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1 EIO /2014

2 The information provided in this documentation contains general descriptions and/or technical characteristics of the performance of the products contained herein. This documentation is not intended as a substitute for and is not to be used for determining suitability or reliability of these products for specific user applications. It is the duty of any such user or integrator to perform the appropriate and complete risk analysis, evaluation and testing of the products with respect to the relevant specific application or use thereof. Neither Schneider Electric nor any of its affiliates or subsidiaries shall be responsible or liable for misuse of the information contained herein. If you have any suggestions for improvements or amendments or have found errors in this publication, please notify us. No part of this document may be reproduced in any form or by any means, electronic or mechanical, including photocopying, without express written permission of Schneider Electric. All pertinent state, regional, and local safety regulations must be observed when installing and using this product. For reasons of safety and to help maintain compliance with documented system data, only the manufacturer should perform repairs to components. When devices are used for applications with technical safety requirements, the relevant instructions must be followed. Failure to use Schneider Electric software or approved software with our hardware products may result in injury, harm, or improper operating results. Failure to observe this information can result in injury or equipment damage Schneider Electric. All rights reserved. EIO /2014 2

3 Table of Contents Safety Information 4 About the Book 6 1 M168 PC Board Introduction M168 PC Board Controllers TM168B23PCBS Controller TM168B08PCBC Controller Range Environmental Features Installation First Start-Up Installation on the DIN Rail M168 Controllers TM168B23PCBS Controller Physical Description Electrical Characteristics and Wiring Diagrams Serial Ports Expansion Bus Serial Port Programming Port Memory Backup/Restore RTC (Real Time Clock) TM168B08PCBC Controller Physical Description Electrical Characteristics and Wiring Diagrams...52 Serial Ports Expansion Bus Serial Port Programming Port Memory Backup/Restore RTC (Real Time Clock) APPENDICES NTC 10k beta 3435 Resistance Temperature Table PTC KTY81_121 Resistance Temperature Table NTC 10k-2 beta (25/50) 3977 Resistance Temperature Table NTC 10k-3 beta (25/50) 3635 Resistance Temperature Table PT1000 Resistance Temperature Table 77 Index 79 EIO /2014 3

4 Safety Information Safety Information Important Information NOTICE Read these instructions carefully, and look at the equipment to become familiar with the device before trying to install, operate, or maintain it. The following special messages may appear throughout this documentation or on the equipment to warn of potential hazards or to call attention to information that clarifies or simplifies a procedure. PLEASE NOTE Electrical equipment should be installed, operated, serviced, and maintained only by qualified personnel. No responsibility is assumed by Schneider Electric for any consequences arising out of the use of this material. EIO /2014 4

5 Safety Information A qualified person is one who has skills and knowledge related to the construction and operation of electrical equipment and the installation, and has received the safety training necessary to recognize and avoid the hazards involved. EIO /2014 5

6 About the Book About the Book At a Glance Document Scope Validity Note Related Documents This document describes the M168 PC Board controllers and the accessories including installation and wiring information. This document is valid for SoHVAC V3.0. Title of Documentation Modicon M168 Controller Hardware Guide SoHVAC C Programming Language User Guide SoHVAC Software User Guide SoHVAC Standard Library User Guide Modicon M168 Electronic Expansion Valve Driver Hardware Guide TM168B23PCBS Instruction sheet TM168B08PCBC Instruction sheet Modicon M168 Controllers Network Connectivity Modules User Guide Reference Number EIO EIO EIO EIO EIO S1B72772 EAV37464 S1A38393 You can download these technical publications and other technical information from our website at EIO /2014 6

7 About the Book Product Related Information DANGER HAZARD OF ELECTRIC SHOCK, EXPLOSION OR ARC FLASH Disconnect all power from all equipment including connected devices, prior to removing any covers or doors, or installing or removing any accessories, hardware, cables, or wires. Always use a properly rated voltage sensing device to confirm the power is removed. Replace and secure all covers, accessories, hardware, cables, and wires and confirm that a proper ground connection exists before applying power to the unit. Use only the specified voltage when operating this equipment and any associated products. Failure to follow these instructions will result in death or serious injury. This equipment has been designed to operate outside of any hazardous location. Only install this equipment in zones known to be free of hazardous atmosphere. POTENTIAL FOR EXPLOSION DANGER Install and use this equipment in non-hazardous locations only. Failure to follow these instructions will result in death or serious injury. The use and application of the information contained herein require expertise in the design and programming of automated control systems. Only you, the user, machine builder or system integrator can be aware of all the conditions and factors present during installation and setup, operation, and maintenance of the machine or process, and can therefore determine the automation and associated equipment and the related safeties and interlocks which can be effectively and properly used. When selecting automation and control equipment, and any other related equipment or software, for a particular application, the user or integrator must also consider any applicable local, regional or national standards and/or regulations. REGULATORY INCOMPATIBILITY WARNING Ensure that all equipment applied and systems designed comply with all applicable local, regional and national regulations and standards. Failure to follow these instructions can result in death, serious injury, or equipment damage. EIO /2014 7

8 About the Book WARNING UNPROTECTED OPEN EQUIPMENT You must install this equipment in an approved enclosure providing a minimum of IP20 level of protection. The enclosure must protect this equipment from casual access. Only install this equipment in strict accordance with the accompanying and supporting documentation. Failure to follow these instructions can result in death, serious injury, or equipment damage. WARNING UNINTENDED EQUIPMENT OPERATION Use appropriate safety interlocks where personnel and/or equipment hazards exist. Use the sensor power supply only for supplying power to sensors connected to the module. Power line and output circuits must be wired and fused in compliance with local and national regulatory requirements for the rated current and voltage of the particular equipment. Use only isolating SELV / Class II power supplies to supply power and respect the current limitations specified in this document. Use fuses designed to Type T standards per IEC Recommended: R/C JDYX2/8 or Listed JDDZ; these fuses are UL recognized and CSA approved. Use this equipment only in HVAC applications. Do not disassemble, repair, or modify this equipment. Do not connect wires to unused terminals and/or terminals indicated as No Connection (N.C.). Failure to follow these instructions can result in death, serious injury, or equipment damage. WARNING UNINTENDED EQUIPMENT OPERATION DUE TO ELECTROSTATIC DISCHARGE DAMAGE Keep equipment in the protective conductive packaging until you are ready to install the equipment. Only install equipment in approved enclosures that prevent casual access and provide electrostatic discharge protection as defined by IEC Use a conductive wrist strap or equivalent field force protective device attached to an earth ground when handling this equipment. Always discharge yourself by touching a grounded surface or approved antistatic mat before opening the cabinet containing the equipment. Failure to follow these instructions can result in death, serious injury, or equipment damage. EIO /2014 8

9 About the Book LOSS OF CONTROL WARNING The designer of any control scheme must consider the potential failure modes of control paths and, for certain critical control functions, provide a means to achieve a safe state during and after a path failure. Examples of critical control functions are emergency stop and overtravel stop, power outage and restart. Separate or redundant control paths must be provided for critical control functions. System control paths may include communication links. Consideration must be given to the implications of unanticipated transmission delays or failures of the link. Observe all accident prevention regulations and local safety guidelines. 1 Each implementation of this equipment must be individually and thoroughly tested for proper operation before being placed into service. Failure to follow these instructions can result in death, serious injury, or equipment damage. 1 For additional information, refer to NEMA ICS 1.1 (latest edition), "Safety Guidelines for the Application, Installation, and Maintenance of Solid State Control" and to NEMA ICS 7.1 (latest edition), "Safety Standards for Construction and Guide for Selection, Installation and Operation of Adjustable-Speed Drive Systems" or their equivalent governing your particular location. WARNING HOT SURFACES You must wear thermal resistive protective clothing and hand protection when working with and around this equipment. Failure to follow these instructions can result in death, serious injury, or equipment damage. WARNING UNINTENDED EQUIPMENT OPERATION Only use software approved by Schneider Electric for use with this equipment. Update your application program every time you change the physical hardware configuration. Failure to follow these instructions can result in death, serious injury, or equipment damage. EIO /2014 9

10 M168 PC Board Introduction 1 M168 PC Board Introduction The TM168B23PCBS is a controller dedicated to HVAC control applications. It supports the same functions as the TM168B23S controller of the M168 offer. However, the TM168B23PCBS is an open equipment version of that controller. 1.1 M168 PC Board Controllers TM168B23PCBS Controller The TM168B23PCBS is a programmable controller with the following options: Reference Display Analog Inputs Analog Outputs PWM Output Low- Voltage Digital Input Relay Outputs Communication ports Network connectivity slot TM168B23PCBS No Modbus 1 ExpBus No For more information, refer to TM168B23PCBS Controller. Digital Inputs The TM168B23PCBS controller is equipped with 7 isolated low-voltage digital inputs. For more information, refer to TM168B23PCBS Digital Inputs. EIO /

11 M168 PC Board Introduction Digital Outputs Analog Inputs Analog Outputs Serial Ports The TM168B23PCBS controller is equipped with 8 digital outputs: 7 NO relays 1 CO relay For more information, refer to TM168B23PCBS Digital Outputs. The TM168B23PCBS controller is equipped with 5 inputs that you can configure using the SoHVAC software: NTC probes: C ( F) (10 KΩ ±1% at 25 C (77 F)) PTC probes: C ( F) (990 Ω ±1% at 25 C (77 F)) PT1000 probes: C ( F) 0 5 Vdc ratiometric transducers 0 10 Vdc transducers 0 20 ma transducers 4 20 ma transducers For more information, refer to TM168B23PCBS Analog Inputs. The TM168B23PCBS controller is equipped with 3 analog outputs: 2 analog outputs configurable using the SoHVAC software: o o o Vdc ma ma 1 PWM output For more information, refer to TM168B23PCBS Analog Outputs. The TM168B23PCBS controller has the following serial communication ports: 2 Modbus serial ports: o 1 RS-485 for use with the Modbus protocol (slave only) o 1 RS-485 for use with the Modbus protocol (master or slave) 1 serial port for connecting expansion modules (ExpBus) 1 programming port For more information, refer to TM168B23PCBS Serial Ports. RTC A Real Time Clock is embedded in the TM168B23PCBS controller. For more information, refer to TM168B23PCBS RTC (Real Time Clock). For more information on additional equipments, refer to M168 Controller Hardware Guide. EIO /

12 M168 PC Board Introduction TM168B08PCBC Controller Range The TM168B08PCBC are programmable controllers with the following options: Reference Display Relay Outputs Analog Inputs Analog Outputs Communication Ports TM168B08PCBC No Modbus ExpBus USB Programming port For more information, refer to TM168B08PCBC Controller. Network Connectivity Slot Yes EIO /

13 M168 PC Board Introduction Digital Outputs Analog Inputs Analog Outputs Serial Ports The TM168B08PCBC controller is equipped with 3 digital outputs: 3 NO relays For more information, refer to TM168B08PCBC Digital Outputs. The TM168B08PCBC controller is equipped with 1 input that you can configure either as analog or digital input using the SoHVAC software: NTC probes: C ( F) (10 KΩ ±1% at 25 C (77 F)) PT1000 probes: C ( F) PTC probes: C ( F) (990 Ω ±1% at 25 C (77 F)) 0 5 Vdc ratiometric transducers 0 10 Vdc transducers 0 20 ma transducers 4 20 ma transducers KΩ resistance measurement Dry contact digital input (non-isolated) The TM168B08PCBC controller is equipped with 3 inputs that you can configure either as analog or digital input using the SoHVAC software: NTC probes: C ( F) (10 KΩ ±1% at 25 C (77 F)) PT1000 probes: C ( F) PTC probes: C ( F) (990 Ω ±1% at 25 C (77 F)) Dry contact digital input (non-isolated) For more information, refer to TM168B08PCBC Analog Inputs. The TM168B08PCBC controller is equipped with 1 analog output that you can configure using the SoHVAC software: Vdc. For more information, refer to TM168B08PCBC Analog Outputs. The TM168B08PCBC controller has the following serial communication ports: 2 Modbus serial ports: o 1 RS-485 for use with the Modbus protocol (slave only) o 1 RS-485 for use with the Modbus protocol (master or slave) 1 serial port for connecting expansion modules (ExpBus) 1 USB port 1 network slot for Building Management System (BMS) connectivity For more information, refer to TM168B08PCBC Serial Ports. RTC A Real Time Clock is embedded in the TM168B08PCBC controller. For more information, refer to TM168B08PCBC RTC (Real Time Clock). EIO /

14 M168 PC Board Introduction 1.2 Environmental Features Environmental Feature Storage temperature Ambient temperature Relative Humidity Operation altitude Transport altitude Vibration Mechanical shock C ( F) C ( F) % non-condensing Description from 0 to 2000 m (0 to 6562 ft) from 0 to 3048 m (0 to ft) Hz: 3.5 mm/0.14 in displacement 8.4 Hz Hz: 1 g n acceleration 15 gpeak 11 ms; half-sine test Pollution degree 2 Overvoltage category 3 EMC compliance level Product conformity EN/IEC Exempted as defined by EN/IEC for Open Equipment Environmental regulations ROHS 2002/95 REACH CE1907/2006 Housing Characteristic Value Installation 35-mm DIN/EN Mounting base DIN Material Plastic UL 94 V0 Resistance to fire and heat IEC/EN Protection level IP 00 EIO /

15 M168 PC Board Introduction 1.3 Installation Before Starting Disconnecting Power Read and understand this manual before beginning the installation of your M168 Controller. All options and modules should be assembled and installed before installing the control system on a mounting rail. Remove the control system from its mounting rail before disassembling the equipment. This product, like all microcontroller products, uses semiconductors that can be damaged by electrostatic discharge (ESD). DANGER HAZARD OF ELECTRIC SHOCK, EXPLOSION OR ARC FLASH Disconnect all power from all equipment including connected devices, prior to removing any covers or doors, or installing or removing any accessories, hardware, cables, or wires. Always use a properly rated voltage sensing device to confirm the power is removed. Replace and secure all covers, accessories, hardware, cables, and wires and confirm that a proper ground connection exists before applying power to the unit. Use only the specified voltage when operating this equipment and any associated products. Failure to follow these instructions will result in death or serious injury. Operating Environment This equipment has been designed to operate outside of any hazardous location. Only install this equipment in zones known to be free of hazardous atmosphere. DANGER POTENTIAL FOR EXPLOSION Install and use this equipment in non-hazardous locations only. Failure to follow these instructions will result in death or serious injury. EIO /

16 M168 PC Board Introduction LOSS OF CONTROL WARNING The designer of any control scheme must consider the potential failure modes of control paths and, for certain critical control functions, provide a means to achieve a safe state during and after a path failure. Examples of critical control functions are emergency stop and overtravel stop, power outage and restart. Separate or redundant control paths must be provided for critical control functions. System control paths may include communication links. Consideration must be given to the implications of unanticipated transmission delays or failures of the link. Observe all accident prevention regulations and local safety guidelines. 1 Each implementation of this equipment must be individually and thoroughly tested for proper operation before being placed into service. Failure to follow these instructions can result in death, serious injury, or equipment damage. 1 For additional information, refer to NEMA ICS 1.1 (latest edition), "Safety Guidelines for the Application, Installation, and Maintenance of Solid State Control" and to NEMA ICS 7.1 (latest edition), "Safety Standards for Construction and Guide for Selection, Installation and Operation of Adjustable-Speed Drive Systems" or their equivalent governing your particular location. WARNING UNINTENDED EQUIPMENT OPERATION Use appropriate safety interlocks where personnel and/or equipment hazards exist. Install and operate this equipment in an enclosure appropriately rated for its intended environment. Use the sensor and actuator power supplies only for supplying power to the sensors or actuators connected to the module. Power line and output circuits must be wired and fused in compliance with local and national regulatory requirements for the rated current and voltage of the particular equipment. Do not use this equipment in safety-critical machine functions. Do not disassemble, repair, or modify this equipment. Do not connect any wiring to unused connections, or to connections designated as Not Connected (N.C.). Failure to follow these instructions can result in death, serious injury, or equipment damage. WARNING UNINTENDED EQUIPMENT OPERATION Install and operate this equipment according to the environmental conditions described in this document. Failure to follow these instructions can result in death, serious injury, or equipment damage. EIO /

17 M168 PC Board Introduction Programming Considerations WARNING UNINTENDED EQUIPMENT OPERATION Only use software approved by Schneider Electric for use with this equipment. Update your application program every time you change the physical hardware configuration. Failure to follow these instructions can result in death, serious injury, or equipment damage First Start-Up Introduction This procedure helps you through the first installation and start-up of your M168 controller. Startup Procedure Step Action Comment 1 Unpack your devices verify the contents of the package. 2 Mount your devices on DIN rail. Package contents. Refer to the Installation on a DIN rail. 3 Connect your devices to the inputs. 4 Connect your devices to the outputs. 5 Connect your devices to the power supply. 6 Connect your M168 controller to your PC. Refer to the TM168B23PCBS Digital Inputs or the TM168B08PCBC Digital Inputs. Refer to the TM168B23PCBS Digital Outputs. Refer to the TM168B08PCBC Digital Outputs. Refer to the TM168B23PCBS Power Supply. Refer to the TM168B08PCBC Power Supply. SoHVAC must be installed on your PC. 7 Apply power. Refer to the State Machine in the SoHVAC Software User Guide. 8 Create an application. Refer to the SoHVAC Software User Guide. 9 Download your application into the M168 controller. 10 Run the application to fully test the program and control system before commissioning. Refer to the SoHVAC Software User Guide. Refer to the SoHVAC Software User Guide. EIO /

18 M168 PC Board Introduction Installation on the DIN Rail The M168 controller and expansion module must be installed on 35 mm/1.38 in DIN rail complying with EN The DIN rail depth can be 7.5 mm/0.29 in or 15 mm/0.59 in. To install the M168 controller or expansion module, proceed as indicated in the figures. To remove the M168 controller or expansion module, use a screw driver and proceed as indicated in the figures. EIO /

19 TM168B23PCBS Controller 2 M168 Controllers 2.1 TM168B23PCBS Controller Physical Description Number 1 LED Status 2 Power supply unit terminal block 3 Programming port 4 Analog inputs terminal block 5 Digital inputs terminal block 6 Analog outputs terminal block Description 7 2 RJ45 connectors for MBS1 and MBS2 serial lines 8 Dip switches for termination and polarization (Modbus or ExpBUS) 9 ExpBUS terminal block 10 Auxiliary power supply for remote display 11 Relay outputs terminal block EIO /

20 TM168B23PCBS Controller Dimensions The dimensions of the controllers are displayed below. All dimensions are in millimeters and equivalent inches. LED Characteristics The table indicates the main function for the LEDs: LED PWR RUN ERR EXP Main Function Power Controller operation state Alarm ExpBus Off: No power supply On: Presence of power supply Meaning Off: The controller is in STOP state 1 On: The controller is in RUN state Slow flashes: Controller in RUN state. The installed application program has been compiled for debugging, Rapid flashes: Controller halted at a breakpoint. The installed application program has been compiled for debugging. During execution, the program halted at a breakpoint. Off: No alarms On: An error was detected that must be corrected before the alarm can be cleared. Slow flashes: An error was detected. Once corrected, the controller will automatically clear the alarm. Rapid flashes: An error was detected that requires manual acknowledgement before the alarm can be cleared. Off: Communication ok On: Error detected on expansion bus 1 If the LED remains Off, it may mean that your application is not compatible with the controller. EIO /

21 TM168B23PCBS Controller Electrical Characteristics and Wiring Diagrams DANGER FIRE HAZARD Use only the recommended wire sizes for I/O channels and power supplies. Failure to follow these instructions will result in death or serious injury Connectors WARNING UNINTENDED EQUIPMENT OPERATION Do not exceed any of the rated values specified in all the characteristic tables. Failure to follow these instructions can result in death, serious injury, or equipment damage. The following table shows the wire type and sizes for the connector ports. The connectors are plug-in terminal blocks of a 5 mm (0.19 in) pitch for conductors up to 2.5 mm² (14 AWG) with M3 screw thread. EIO /

22 TM168B23PCBS Controller Cabling Length I/O and Serial Lines Maximum Length Peripheral Type Maximum Length Power supply Embedded sensor PS Digital inputs Analog inputs Relay digital outputs Configurable analog outputs FAN analog output Modbus SL1 Bus Modbus SL2 Bus Expansion bus Supply for remote display PC programming port 30 m (98.42 ft) 100 m ( ft) 100 m ( ft) 100 m ( ft) 100 m ( ft) 100 m ( ft) 1 m (3.28 ft) 1000 m ( ft) 1000 m ( ft) 1000 m ( ft) (Refer to Expansion Bus Serial Port). 30 m (98.42 ft) 5 m (16.40 ft) EIO /

23 TM168B23PCBS Controller Power Supply Power Supply Characteristics The table indicates the power supply characteristics: Characteristic Voltage Frequency Isolation required Built-in protection Maximum consumption Protection Micro-breaks immunity Value 24 Vac ±15% / Vdc 50 / 60 Hz ±3 Hz isolated SELV / Class II reverse polarity AC supply power: 30 VA DC supply power: 22 W external 2.5 A Type T fuse required 10 ms Power Supply Wiring Diagram EIO /

24 TM168B23PCBS Controller Digital Inputs Digital Inputs Characteristics The table indicates the digital inputs characteristics: Characteristic Value Type Voltage range Input impedance Protection against overvoltage 24 Vac / 24 Vdc opto-isolated voltage input Vdc: V Vac: 24 V ±15%; Frequency: 50/60 Hz ±3 Hz > 10 kω none Digital Sink/Source Inputs (Positive/Negative Logic) External Power Wiring Diagram (1) 0.5 A fast-blow fuse NOTE: You can use either a 24 Vdc or a 24 Vac external power supply. Marking Description DI1 low voltage digital input number 1 DI2 low voltage digital input number 2 DI3 low voltage digital input number 3 DI4 low voltage digital input number 4 DI5 low voltage digital input number 5 DI6 low voltage digital input number 6 DI7 low voltage digital input number 7 DICOM common terminal for digital inputs EIO /

25 TM168B23PCBS Controller Digital Outputs Digital Output Characteristics The table indicates the 8 A relay characteristics: Characteristic Value Voltage range Maximum current Minimum switching capacity Maximum switching rate Response time Mechanical life Electrical durability, operating cycles Conforming to IEC/EN Vdc Vac 8 A 10 ma (minimum voltage at 12 Vdc or 24 Vac) 0.1 Hz close = 10 ms open = 5 ms operations (cycles) DC 12: 24 Vdc / 1.5 A DC 13: 24 Vdc / 0.6 A (L/R = 10 ms) AC 12: 230 Vac / 1.5 A AC 15: 230 Vac / 0.9 A The table indicates the 5 A relay characteristics: Characteristic Value Voltage range Maximum current Minimum switching capacity Maximum switching rate Response time Mechanical life Electrical durability 5 30 Vdc Vac 5 A 10 ma / 5 Vdc Off load: 20 Hz at operating current: 0.1 Hz Close = 8 ms Open = 4 ms operations (cycles) operating cycles DC 12: 30 Vdc / 2 A operating cycles DC 13: 24 Vdc / 1 A (L/R = 48 ms) operating cycles AC 12: 250 Vac / 2.5 A operating cycles AC 15: 250 Vac / 3 A cos phi = 0.4 EIO /

26 TM168B23PCBS Controller Protecting Outputs from Inductive Load Damage Depending on the load, a protection circuit may be needed for the outputs on the controllers and certain modules. Inductive loads using DC voltages may create voltage reflections resulting in overshoot that will damage or shorten the life of output devices. CAUTION OUTPUT CIRCUIT DAMAGE DUE TO INDUCTIVE LOADS Use an appropriate external protective circuit or device to reduce the risk of inductive direct current load damage. Failure to follow these instructions can result in injury or equipment damage. Relay outputs can support up to 250 Vac. Inductive damage to these types of outputs can result in welded contacts and loss of control. Each inductive load must be equipped with a protection device such as a peak limiter, RC circuit or flyback diode. Capacitive loads are not supported by these relays. WARNING RELAY OUTPUTS WELDED CLOSED Always protect relay outputs from inductive alternating current load damage using an appropriate external protective circuit or device. Do not connect relay outputs to capacitive loads. Failure to follow these instructions can result in death, serious injury, or equipment damage. Protective circuit A: This protection circuit can be used for both AC and DC load power circuits. C represents a value from 0.1 to 1 µf. R represents a resistor of approximately the same resistance value as the load. Protective circuit B: This protection circuit can be used for DC load power circuits. Use a diode with the following ratings: Reverse withstand voltage: power voltage of the load circuit x 10. Forward current: more than the load current. EIO /

27 TM168B23PCBS Controller Protective circuit C: This protection circuit can be used for both AC and DC load power circuits. In applications where the inductive load is switched on and off frequently and/or rapidly, ensure that the continuous energy rating (J) of the varistor exceeds the peak load energy by 20% or more. Digital Output Wiring Diagram with Different Sources Relay Groups The outputs are divided into groups with different commons (COMx, COMy, COMx-y). The groups are as follows (see the connections layout): Group n 1 : COM1-2 / NO1 / NO2; COM3 / NO3 Group n 2 : COM4-5 / NO4 / NO5; COM6-7 / NO6 / NO7 Group n 3 : COM8 / NO8 / NC8 There are different levels of isolation between the groups and consequently these may have different voltages. The relays belonging to the same group have minimal level of isolation between their commons and therefore must have the same energy level (24 Vac, 24 Vdc or 230 Vac). The current through the common terminals must not exceed the rated current: COMx: maximum current of the relay COMx-y: maximum current of 10 A NOTE: Each relay connector must have the same unique voltage. DANGER ELECTRIC SHOCK Do not mix voltage types or levels on the same relay connector. Failure to follow these instructions will result in death or serious injury. EIO /

28 TM168B23PCBS Controller Maximum Current The table indicates the maximum current per connection for the controller: Terminal Maximum Current Description COM A common relay number 1 2 NO1 5 A normally open contact relay number 1 NO2 8 A normally open contact relay number 2 COM3 8 A common relay number 3 NO3 8 A normally open contact relay number 3 COM A common relay number 4 5 NO4 8 A normally open contact relay number 4 NO5 5 A normally open contact relay number 5 COM A common relay number 6 7 NO6 8 A normally open contact relay number 6 NO7 5 A normally open contact relay number 7 COM8 8 A common relay number 8 NO8 8 A normally open contact relay number 8 NC8 5 A normally closed contact relay number 8 NOTE: The current through the common terminals must not exceed the rated current. EIO /

29 TM168B23PCBS Controller Analog Inputs Analog Input Characteristics The table indicates the input characteristics for voltage sensing: Characteristic Value Range Input impedance Accuracy Resolution Conversion time Value of Least Significant Bit (LSB) (Analog to Digital Conversion (ADC)) Isolation Built-in protection Digital resolution 0 5 Vdc ratiometric / 0 10 Vdc 10 kω ±0.5% of full scale 0.01 Vdc 100 ms 5 mv none reverse protection A/D conversion: 10 bits The table indicates the input characteristics for current sensing: Characteristic Value Range Input Impedance Accuracy Resolution Conversion time Value of LSB (ADC) Isolation Maximum current Built-in protection Digital resolution 0/4 20 ma 200 Ω ±0.5% of full scale 0.01 ma 100 ms 0.01 ma none 25 ma none A/D conversion: 10 bits EIO /

30 TM168B23PCBS Controller The table indicates the input characteristics for temperature sensing (NTC at 10 kω at 25 C / 77 F: Characteristic Value NTC type 10 k beta 3435 Range Accuracy Resolution Conversion time Value of LSB Isolation Built-in protection Digital resolution C ( F) ±0.7 C (±33.26 F) of full scale C ( F range) and ±1 C (±33.8 F) C and C ( F and F) 0.1 C (32.18 F) 100 ms 0.07 C (32 F) none none A/D conversion: 10 bits The table indicates the input characteristics for temperature sensing (PT1000): Characteristic Value Range Accuracy Resolution Conversion time Value of LSB (ADC) Isolation Built-in protection Digital resolution C ( F) ±0.5% of full scale 0.5 C (32.9 F) 100 ms 0.15 C (32.27 F) none none A/D conversion: 10 bits EIO /

31 TM168B23PCBS Controller The table indicates the input characteristics for temperature sensing (PTC at 950 Ω at 25 C): Characteristic Value PTC type Range Accuracy Resolution Conversion time Value of LSB Isolation Built-in protection Digital resolution KTY81_ C ( F) ±0.5% of full scale C ( F range) and ±1 C (±33.8 F) C and C ( F and F) 0.1 C (32.18 F) 100 ms 0.07 C (32 F) none none A/D Conversion: 10 bits EIO /

32 TM168B23PCBS Controller Built-in Power Supply for Sensors The table indicates the built-in power supply characteristics for +5 Vdc: Characteristic Value Voltage Current Built-in protection Vdc 40 ma max. against overload and short-circuit (thermal protection) The table indicates the built-in power supply characteristics for +24 Vdc: Characteristic Value Voltage Current Built-in protection Vdc 120 ma max. against overload and short-circuit (thermal protection) The power supply protection is thermal protected. It will automatically attempt to re-arm itself once the temperature has fallen below the pre-established temperature threshold. WARNING UNINTENDED EQUIPMENT OPERATION Remove all power from all equipment when correcting a short-circuit or overload condition. Failure to follow these instructions can result in death, serious injury, or equipment damage. Analog Input Wiring Diagram for Temperature and Voltage Mode EIO /

33 TM168B23PCBS Controller Analog Input Wiring Diagram for Current Sensing Mode NOTICE INOPERABLE EQUIPMENT Do not apply voltages above 11 Vdc to the analog inputs of the controller or I/O expansion module. Failure to follow these instructions can result in equipment damage. Marking Description GND AI1 AI2 AI3 AI4 AI5 GND 5V-S 24V-S Common terminal for analog input analog input 1, configurable (NTC, PTC, PT1000, ma, ma, 0 5 Vdc, 0 10 Vdc) analog input 2, configurable (NTC, PTC, PT1000, ma, ma, 0 5 Vdc, 0 10 Vdc) analog input 3, configurable (NTC, PTC, PT1000, ma, ma, 0 5 Vdc, 0 10 Vdc) analog input 4, configurable (NTC, PTC, PT1000, ma, ma, 0 5 Vdc, 0 10 Vdc) analog input 5, configurable (NTC, PTC, PT1000, ma, ma, 0 5 Vdc, 0 10 Vdc) common terminal for probes power supply ratiometric probes power supply output sensor power supply output EIO /

34 TM168B23PCBS Controller Analog Outputs Analog Output Characteristics The table indicates the output characteristics for voltage actuator: Characteristic Value Range Minimum load impedance Accuracy Step-wise resolution Conversion time Isolation Built-in protection 0 10 Vdc 1 kω % of full scale for load impedance from 1 5 kω ±2% of full scale for load impedance > 5 kω 0.01 Vdc 1 s None against overload (thermal protection) The table indicates the output characteristics for current actuator: Characteristic Value Range Load impedance Accuracy Resolution Conversion time Isolation Built-in protection 0/4 20 ma Ω range ±3% of full scale 0.02 ma 1 s None against overload (thermal protection) The power supply is thermal protected. It will automatically attempt to re-arm itself once the temperature has fallen below the pre-established temperature threshold. WARNING UNINTENDED EQUIPMENT OPERATION Remove all power from all equipment when correcting a short-circuit or overload condition. Failure to follow these instructions can result in death, serious injury, or equipment damage. EIO /

35 TM168B23PCBS Controller Analog Output Wiring Diagram (1) voltage/current actuator Marking Description FAN + FAN - GND AO1 AO2 reserved for future expansions reserved for future expansions common terminal for analog outputs analog output number 1 configurable 0 10 Vdc / 0 20 ma, 4 20 ma analog output number 2 configurable 0 10 Vdc / 0 20 ma, 4 20 ma EIO /

36 TM168B23PCBS Controller Serial Ports Modbus Serial Port MBS1 MBS1 is an RS-485, 2-wire Modbus serial line using an RJ45 connector. It can be configured only as a Modbus slave. Slave configuration is adjustable using the SoHVAC software. RJ45 - I/O Layout Description RJ45 Pin Signal Description 1 - N.C. 2 - N.C. 3 - N.C. 4 D1 (A+) transceiver terminal 1, V1 voltage 5 D0 (B-) transceiver terminal 0, V0 voltage 6 - N.C. 7 - N.C. 8 Common signal common Communication and Status Indicators The MBS1 RJ45 connector has: 1 orange LED for communication 1 red LED for error detection Orange LED for Communication Description Off Flashing On Serial port not configured Serial port configured, communication is OK Serial port configured as slave invalid Modbus packet received Red LED for errors Off Flashing On No error Description Communication configuration error: frame error or parity error or overrun error Communication data error: valid packet received but not processed, not acknowledged EIO /

37 TM168B23PCBS Controller Setting the Built-in Line Termination Mode The dip-switch MBS1 TER, found to the right of the MBS2 port, is used to connect a 120 Ω/0.25 W resistor for line termination. Marking Description 1 ON: Modbus serial 1 line terminated 2 ON: Modbus serial 2 line terminated 3 4 ON: Modbus serial 2 polarized (Dip switches 3 and 4 have to be in the same position) ON: Modbus serial 2 polarized (Dip switches 3 and 4 have to be in the same position) 5 ON: expansion bus line terminated EIO /

38 TM168B23PCBS Controller Installation as Slave with Line Termination If the M168 controller is installed at one end of the main Modbus fieldbus, line termination (the MBS1 TER dip switch) must be turned on. If line termination is not applied for this fieldbus layout, the Modbus communications will not function reliably. Installation as Slave without Line Termination If the M168 controller is installed on a trunk line of the main Modbus fieldbus, line termination (the MBS1 TER dip switch) must be turned off. The trunk line must not exceed 20 m (65 ft) in length. EIO /

39 TM168B23PCBS Controller Modbus Serial Port MBS2 MBS2 is an RS-485, 2-wire Modbus serial line using an RJ45 connector. It can be configured as Modbus master or Modbus slave. Modbus master/ Modbus slave configuration is adjustable using either the SoHVAC software or by setting the parameter using the device configuration user interface. RJ45 I/O Layout Description RJ45 Pin Signal Description 1 - N.C. 2 - N.C. 3 - N.C. 4 D1 (A+) transceiver terminal 1, V1 Voltage 5 D0 (B-) transceiver terminal 0, V0 Voltage 6 - N.C. 7 - N.C. 8 Common signal common Communication and Status Indicators The MBS2 RJ45 connector has one orange LED for communication and one red LED for error detection Orange LED for Communication Off Serial port not configured Description Flashing Serial port configured, communication is OK Serial port configured as master On Timeout expired after last Modbus request Serial port configured as slave Invalid Modbus packet received Off Red LED for errors No error Description Flashing On Communication configuration error: frame error or parity error or overrun error Communication data error: valid packet received but not processed, not acknowledged EIO /

40 TM168B23PCBS Controller Setting the Built-in Line Termination and Fieldbus Polarization Modes The dip-switch MBS2 TER, found just to the right of the MBS2 port, is used to connect a 120 Ω/0.25 W resistor for line termination. The dip-switches POL MBS2 (dip switch 3 and 4) are used for polarization of the Modbus line with a 560 Ω/0.25 W resistor. Marking Description 1 ON: Modbus serial 1 line terminated 2 ON: Modbus serial 2 line terminated 3 ON: Modbus serial 2 polarized (Dip switches 3 and 4 must be in the same position) 4 ON: Modbus serial 2 polarized (Dip switches 3 and 4 must be in the same position) 5 ON: expansion bus line terminated Installation as Master Using Line Termination and Polarization If the M168 controller is installed at one end of the main Modbus fieldbus, line termination (the MBS2 TER dip switch) and polarization (both POL MBS2 dip switches) must be turned on. If line termination and polarization are not applied for this fieldbus layout, the Modbus communications will not function reliably. EIO /

41 TM168B23PCBS Controller Installation as Master Using Polarization Only If the M168 controller is installed on a trunk line of the main Modbus fieldbus, line termination (the MBS2 TER dip switch) must be turned off and polarization (both POL MBS2 dip switches) must be turned on. The trunk line must not exceed 20 m (65 ft) in length. For more information about the Modbus Function Codes which are supported when the serial port is configured as a Modbus master, refer to the SoHVAC Standard Library User Guide. EIO /

42 TM168B23PCBS Controller Modbus Settings and Supported Functions Data Link Layer Slave address Baud rate (Bds) Parity Mode Broadcast The default value is , 24000, 4800, 9600, 19200, 28800, 38400, The default value is None, Odd and Even The default value is even. RTU Yes Application Layer Messaging class Functions supported: Function FC 01 FC 02 FC 03 FC 04 FC 05 FC 06 FC 08 FC 15 FC 16 FC 23 FC 43 Description Read coils Read discrete inputs Read multiple registers Read input registers Write single coil Write single register Diagnostic Write multiple coils Write multiple registers Read write multiple registers Read device identification Device Management Class Function supported: Function Access type Description Level 1 (Vendor name, product code, version) EIO /

43 TM168B23PCBS Controller M168 Modbus Cabling NOTE: If you do not use the pre-fabricated cable indicated above, you must use shielded cables with the shield connected to Pin 8 of the RJ45 connector. CAUTION INTERRUPTED MODBUS COMMUNICATIONS Only use shielded cables that have Pin 8 of the RJ45 connector connected to the cable shield. Ensure that at least one of the devices you are connecting via Modbus has its serial port connected to the functional ground (FE) or protective ground (PE) of your installation. Ensure that each end of your Modbus serial network is terminated with the correct line termination resistor (125 Ohms/0.25 W). Failure to follow these instructions can result in injury or equipment damage. EIO /

44 TM168B23PCBS Controller Expansion Bus Serial Port This expansion bus is used to connect the M168 controller to other M168 I/O expansion modules and to remote user interface. A maximum of 32 devices can be connected to the expansion bus. The number of devices which can be connected to the expansion bus depends on the baud rate, the type of device, and the cable and wiring of the expansion bus network. The following table provides the recommended maximum number of devices: Baud Rate Recommended Maximum Number Maximum Cable Length 20 kbit/s 4 devices 1000 m (3280 ft) 50 kbit/s 8 devices 500 m (1640 ft) 125 kbit/s 16 devices 250 m (820 ft) 500 kbit/s 32 devices (maximum) 50 m (164 ft) Marking EXP+ EXP- GND Description expansion bus + signal expansion bus - signal expansion bus common Line Termination The dip-switch EXP TER is used to connect the 120 Ω/0.5 W resistor for line termination. The Bus is realized using a double twisted pair wire with line termination on each end. If any of the devices at either end of the cable do not have a built-in possibility to terminate the line, you will need to add a 120 Ω/0.5 W resistor to help maintain reliable communications. Line Termination/Polarization Dip Switch Marking Description 1 ON: Modbus serial 1 line terminated 2 ON: Modbus serial 2 line terminated 3 ON: Modbus serial 2 polarized (Dip switches 3 and 4 must be in the same position) 4 ON: Modbus serial 2 polarized (Dip switches 3 and 4 must be in the same position) 5 ON: expansion bus line terminated EIO /

45 TM168B23PCBS Controller Communication and Status Indicator One red LED for status Bus provides the following information: Red LED Description Off Rapid flashes Expansion bus status OK or expansion bus disabled by SoHVAC Error detected on expansion bus Expansion Bus Address Configuration Each device on the expansion bus must have a unique address. The M168 controller address is set by the hardware wizard in the SoHVAC software and is set during application download in the M168 controller. The TM168E expansion module has a default address of "2" set by the factory. The TM168GDB or TM168GDTS remote displays have a default address of "99" set by the factory. When the expansion bus Network has multiple devices with duplicated addresses, they can be adjusted using the CAN Config tool in the SoHVAC software, the controller or the remote display menus. Follow these steps to use the CAN Config tool in the SoHVAC software: Connect the programming cable to the programming port of the device Start the CAN Config tool under the Tools menu in SoHVAC Select the COM port to communicate with the device Click on Connect to read the device parameters Modifiy the parameters Click on Apply to store the modified parameters into the device EIO /

46 TM168B23PCBS Controller Display Supply Output (To Remote Display) 24V-S GND Marking Description display auxiliary power supply 24 Vdc display auxiliary power supply common Characteristic Description Voltage +24 Vdc ±15% Current Built-in protection 120 ma max (max. 1 remote display, cable length max. 30 m / (98 ft)) against overload and short-circuit (thermal protection) The power supply is thermal protected. It will automatically attempt to re-arm itself once the temperature has fallen below the pre-established temperature threshold. WARNING UNINTENDED EQUIPMENT OPERATION Ensure to remove all power from all equipment when correcting a short-circuit or overload condition. Failure to follow these instructions can result in death, serious injury, or equipment damage Programming Port Programming Connector The M168 controller has a female RJ11 connector, marked Prg. Port, dedicated to all programming functions. EIO /

47 TM168B23PCBS Controller Memory The table indicates the characteristics of the memory: Characteristic Flash program memory RAM data storage memory Value 544 kb 24 kb Backup/Restore Introduction Application Parameters Backup Parameters Application parameters and hardware configurations can be stored (backup) from/into the controller flash memory. This operation is useful during commissioning when multiple parameters are changed and a restore point is required. copy application parameters and hardware configuration parameters from the controller to the controller flash memory (backup) copy application parameters and hardware configuration parameters from controller flash memory to the controller (restore) Application parameters are variables defined in the application program using the Par entity (Par). Hardware configuration parameters are the configuration parameters for inputs/outputs and communication ports NOTE: From the remote display press both ESC and RIGHT buttons for 3 seconds to access the controller menus. Follow the following procedure to backup parameters to the controller flash memory: Step Description 1 Make sure that the controller is connected to the power supply 2 Press both ESC and RIGHT buttons on the remote display for 3 seconds to access the built-in menus 3 Press the Down button to navigate to the Backup/Restore menu and press Enter button 4 5 Restore Parameters Select Application par. to backup application parameters Select Save on Mem to backup the parameters on the controller flash memory (the user interface displays the status of the backup process) Select Hardware Configuration to backup hardware configuration parameters Select Save on Mem to backup the parameters on the controller flash memory (the user interface displays the status of the backup process) Follow the following procedure to restore parameters from the controller flash memory: EIO /

48 TM168B23PCBS Controller Step Description 1 Make sure that the controller is connected to the power supply Press both ESC and RIGHT buttons on the remote display for 3 seconds to access the built-in menus Press the Down button to navigate to the Backup/Restore menu and press Enter button Select Application par. to backup application parameters Select Rest. from Mem to restore the parameters from the controller flash memory (the user interface displays the status of the restore process) Select Hardware Configuration to backup hardware configuration parameters Select Rest. from Mem to restore the parameters from the controller flash memory (the user interface displays the status of the restore process) NOTE: The error LED will illuminate when an error is detected during the backup/restore process RTC (Real Time Clock) The table indicates the functions of the RTC: Function Description Backup type RTC data retention time in the event of a power loss Drift value Super capacitor 3 days 30 sec/month at 25 C EIO /

49 TM168B08PCBC Controller 2.2 TM168B08PCBC Controller Physical Description Number Description 1 LED Status 2 Power supply unit terminal block 3 Expansion bus and Modbus serial lines terminal block 4 Dip switches for Modbus and Expansion bus termination 5 Analog inputs terminal block 6 Programming port 7 Analog outputs terminal block 8 Digital outputs terminal blocks 9 Network connectivity slot EIO /

50 TM168B08PCBC Controller TM168B08PCBC Base without built-in display, programmable 8 I/O EIO /

51 TM168B08PCBC Controller LED Characteristics The table indicates the main function for the LEDs: LED PWR RUN Main Function Power Controller operation state Off: No power supply On: Presence of power supply Meaning Off: The controller is in STOP state 1 On: The controller is in RUN state Slow flashes: Controller in RUN state. The installed application program has been compiled for debugging, Rapid flashes: Controller halted at a breakpoint. The installed application program has been compiled for debugging. During execution, the program halted at a breakpoint. Off: No alarms ERR EXP Alarm ExpBus On: An error was detected that must be corrected before the alarm can be cleared. Slow flashes: An error was detected. Once corrected, the controller will automatically clear the alarm. Rapid flashes: An error was detected that requires manual acknowledgement before the alarm can be cleared. Off: Expansion bus status OK or expansion bus disabled by SoHVAC Slow flashes: error detected on Modbus Fast flashes: error detected on expansion bus On: error detected on expansion bus and Modbus L1 - LED can be controlled by application program. 1 If the LED remains off, your application may not be compatible with the controller. EIO /

52 TM168B08PCBC Controller Electrical Characteristics and Wiring Diagrams Connectors DANGER FIRE HAZARD Use only the recommended wire sizes for I/O channels and power supplies. Failure to follow these instructions will result in death or serious injury. WARNING UNINTENDED EQUIPMENT OPERATION Do not exceed any of the rated values specified in all the characteristic tables. Failure to follow these instructions can result in death, serious injury, or equipment damage. The following table shows the wire type and sizes for the supply, analog input, analog output, and communication ports. The connectors are plug-in terminal blocks of a 3.5 mm (0.13 in) pitch for conductors up to 1.5 mm² (16 AWG) with M2 screw thread. The following table shows the wire type and sizes for the digital output connector port. The connectors are plug-in terminal blocks of a 5 mm (0.19 in) pitch for conductors up to 2.5 mm² (14 AWG) with M3 screw thread. EIO /

53 TM168B08PCBC Controller Cabling Length I/O and Serial Lines Maximum Length Peripheral Type Maximum Length Power supply Embedded sensor PS Digital inputs Analog inputs Relay digital outputs Analog outputs Analog outputs (configured as FAN) Modbus SL1 Bus Modbus SL2 Bus Expansion bus PC programming port 30 m (98.42 ft) 100 m ( ft) 100 m ( ft) 100 m ( ft) 100 m ( ft) 30 m (98.42 ft) 1 m (3.28 ft) 1000 m ( ft) 1000 m ( ft) 1000 m ( ft) (Refer to Expansion Bus Serial Port). 5 m (16.40 ft) EIO /

54 TM168B08PCBC Controller Power Supply Power Supply Characteristics The table indicates the power supply characteristics: Voltage Frequency Characteristic Isolation required Insulation Built-in protection Internal fuse Maximum consumption Protection Minimum voltage detection Micro-breaks immunity Error Status Indicator 24 Vac ±15% / Vdc 50 / 60 Hz ±3 Hz isolated SELV / Class II Value without power supply insulation from the rest of the controller. reverse polarity none 24 Vac Max 20 VA Vdc Max 15 W external 2.5 A Type T fuse required under voltage is detected by the product. 10 ms 1 bit in application 1 green LED Power Supply Wiring Diagram EIO /

55 TM168B08PCBC Controller Digital Outputs Digital Output Characteristics The TM168B08PCBC controller has 3 relay outputs. The table indicates the 5 A relay output characteristics: Characteristic Value Voltage range Maximum current Electrical durability Minimum switch capacity Minimum load Maximum switching rate Mechanical life Voltage or withstanding shocks Response time Built in protection 5 30 Vdc Vac 5 A operating cycles. DC 12: 30 Vdc / 3 A operating cycles. AC 12: 125 Vac / 3 A 10 ma / 5 Vdc 10 ma / 5 Vdc Off load: 20 Hz at operating current: 0.1 Hz 5,000,000 operations (cycles) EN / VDE 0700 Close = 10 ms / Open = 10 ms Against short circuit = none Against over voltages and overloads: none Protecting Outputs from Inductive Load Damage Depending on the load, a protection circuit may be needed for the outputs on the controllers and certain modules. Inductive loads using DC voltages may create voltage reflections resulting in overshoot that will damage or shorten the life of output devices. CAUTION OUTPUT CIRCUIT DAMAGE DUE TO INDUCTIVE LOADS Use an appropriate external protective circuit or device to reduce the risk of inductive direct current load damage. Failure to follow these instructions can result in injury or equipment damage. Relay outputs can support up to 250 Vac. Inductive damage to these types of outputs can result in welded contacts and loss of control. Each inductive load must be equipped with a protection device such as a peak limiter, RC circuit or flyback diode. Capacitive loads are not supported by these relays. EIO /

56 TM168B08PCBC Controller WARNING RELAY OUTPUTS WELDED CLOSED Always protect relay outputs from inductive alternating current load damage using an appropriate external protective circuit or device. Do not connect relay outputs to capacitive loads. Failure to follow these instructions can result in death, serious injury, or equipment damage. Protective circuit A: This protection circuit can be used for both AC and DC load power circuits. C represents a value from 0.1 to 1 µf. R represents a resistor of approximately the same resistance value as the load. Protective circuit B: This protection circuit can be used for DC load power circuits. Use a diode with the following ratings: Reverse withstand voltage: power voltage of the load circuit x 10. Forward current: more than the load current. Protective circuit C: This protection circuit can be used for both AC and DC load power circuits. In applications where the inductive load is switched on and off frequently and/or rapidly, ensure that the continuous energy rating (J) of the varistor exceeds the peak load energy by 20% or more. EIO /

57 TM168B08PCBC Controller Digital Output Wiring Diagram Marking Description COM 1-3 common relay number NO 1 normally open contact relay number 1 NO 2 normally open contact relay number 2 NO 3 normally open contact relay number 3 WARNING UNINTENDED EQUIPMENT OPERATION Do not connect wires to unused terminals and/or terminals indicated as No Connection (N.C.). Failure to follow these instructions can result in death, serious injury, or equipment damage. EIO /

58 TM168B08PCBC Controller Analog Inputs Analog Input Characteristics The table indicates the input characteristics for voltage sensing: Characteristic Value Range Input impedance Accuracy Resolution Conversion time Value of LSB (ADC) Isolation Non destructive voltage Built-in protection Digital resolution 0 5 Vdc ratiometric / 0 10 Vdc 10 kω ±0.5% of full scale 0.01 Vdc 100 ms 5 mv none 11 Vdc maximum reverse protection A/D conversion: 12 bits The table indicates the input characteristics for current sensing: Characteristic Value Range Input Impedance Accuracy Resolution Conversion time Value of LSB (ADC) Isolation Maximum current Built-in protection Digital resolution 0/4 20 ma 200 Ω ±0.5% of full scale 0.01 ma 100 ms 0.01 ma none 25 ma none A/D conversion: 12 bits EIO /

59 TM168B08PCBC Controller The table indicates the input characteristics for temperature sensing (NTC at 10 k Ω at 25 C / 77 F): Characteristic Value NTC type 10 k beta 3435 Range Accuracy Resolution Conversion time Value of LSB Isolation Built-in protection Digital resolution C ( F) ±0.5% of Full scale ( C) / +/-1 C (-50-40; C) 0.1 C (32.18 F) 100 ms 0.07 C (32 F) none none A/D conversion: 12 bits The table indicates the input characteristics for temperature sensing (PT1000): Characteristic Value Range Accuracy Resolution Conversion time Value of LSB (ADC) Isolation Built-in protection Digital resolution C ( F) ±0.5% of full scale ( C) / +/-2 C ( C) 0.1 C 100 ms 0.15 C (32.27 F) none none A/D conversion: 12 bits EIO /

60 TM168B08PCBC Controller The table indicates the input characteristics for temperature sensing (PTC at 1k Ω at 25 C): Characteristic Value PTC type Range Accuracy Resolution Conversion time Value of LSB Isolation Built-in protection Digital resolution KTY81_ C ( F) ±0.5% of full scale C ( F range) and ±1 C (±33.8 F) C and C ( F and F) 0.1 C (32.18 F) 100 ms 0.07 C (32 F) none none A/D Conversion: 10 bits Non-isolated Dry Contact Digital Input Using Analog Input Terminal The table indicates the characteristics of the non-isolated dry contact digital input using analog input terminal: Characteristic Value Type Level 0 Level 1 ON to OFF detection time OFF to ON detection time Isolation Non destructive voltage dry contact digital input contact open, resistance >6 kω contact closed, resistance < 500 Ω <200 ms (hardware delay) <200 ms (hardware delay) none 11 Vdc maximum EIO /

61 TM168B08PCBC Controller Analog Input Wiring Diagram for Temperature and Voltage Mode Analog Input Wiring Diagram for Current Sensing Mode EIO /

62 TM168B08PCBC Controller NOTICE INOPERABLE EQUIPMENT Do not apply voltages above 11 Vdc to the analog inputs of the M168 controller or I/O expansion module. Failure to follow these instructions can result in equipment damage. Marking AI1 AI2 AI3 AI4 GND Description analog input 1, configurable (NTC, PTC, PT1000, 0 10 Vdc, Vdc, 0 20 ma, 4 20 ma, dry contact digital input) analog input 2, configurable (NTC, PTC, PT1000, dry contact digital input) analog input 3, configurable (NTC, PTC, PT1000, dry contact digital input) analog input 4, configurable (NTC, PTC, PT1000, dry contact digital input) common terminal for probes power supply EIO /

63 TM168B08PCBC Controller Analog Outputs Analog Output Characteristics The analog outputs can be configured for voltage 0-10 V. The table indicates the output characteristics for voltage actuator: Characteristic Value Range Minimum load impedance Accuracy Step-wise resolution Conversion time Isolation Built-in protection Digital resolution 0 10 Vdc 1 kω % of full scale for load impedance from 1 5 kω ±2% of full scale for load impedance > 5 kω 0.01 Vdc 1 s None against overload (thermal protection), no protection against short circuit. DAC: 12 bits WARNING UNINTENDED EQUIPMENT OPERATION Remove all power from all equipment when correcting a short-circuit or overload condition. Failure to follow these instructions can result in death, serious injury, or equipment damage. EIO /

64 TM168B08PCBC Controller Analog Output Wiring Diagram Marking AO1 GND Description analog output number 1 configurable 0 10 Vdc common terminal for analog outputs WARNING UNINTENDED EQUIPMENT OPERATION Do not connect wires to unused terminals and/or terminals indicated as No Connection (N.C.). Failure to follow these instructions can result in death, serious injury, or equipment damage. EIO /

65 TM168B08PCBC Controller Serial Ports Modbus Setting and Supported Functions Physical Link Layer: PL1 (RS485 2W with open style connector) Data Link Layer: Basic Slave address Baud rate (Bds) Parity Mode Broadcast Point to point addressing mode The default value is , 2400, 4800, 9600, 19200, 28800, 38400, The default value is None, odd and even The default value is even. RTU Yes With address 248. In master mode it communicates with all slave addresses from 1 to 247. Application Layer Messaging class Regular. Functions supported: Function FC 01 FC 02 FC 03 FC 04 FC 05 FC 06 FC 08 FC 15 FC 16 FC 23 FC 43 Description Read coils Read discrete inputs Read multiple registers Read input registers Write single coil Write single register Diagnostic Write multiple coils Write multiple registers Read write multiple registers (max 10 registers) Read device identification Device Management Class Basic. Function supported: Function Description Access type Level 1 (Vendor name, product code, version) For more information about the Modbus Function Codes which are supported when the serial port is configured as a Modbus master, refer to the SoHVAC Standard Library User Guide. EIO /

66 TM168B08PCBC Controller M168 Modbus Cabling NOTE: If you do not use the pre-fabricated cable indicated above, you must use shielded cables with the shield connected to the ground of the electrical cabinet. CAUTION INTERRUPTED MODBUS COMMUNICATIONS Verify that at least one of the devices you are connecting via Modbus has its serial port connected to the functional ground (FE) or protective ground (PE) of your installation. Ensure that each end of your Modbus serial network is terminated with the correct line termination resistor (125 Ohms/0.25 W). Failure to follow these instructions can result in injury or equipment damage. EIO /

67 TM168B08PCBC Controller Expansion Bus Serial Port This expansion bus is used to connect the M168 controller to other M168 I/O expansion modules and to remote user interface. A maximum of 32 devices can be connected to the expansion bus. The number of devices which can be connected to the expansion bus depends on the baud rate, the type of device, and the cable and wiring of the expansion bus Network. The following table provides the recommended maximum number of devices: Baud Rate Recommended Maximum Number Maximum Cable Length 20 kbit/s 4 devices 1000 m (3280 ft) 50 kbit/s 8 devices 500 m (1640 ft) 125 kbit/s 16 devices 250 m (820 ft) 500 kbit/s 32 devices (maximum) 50 m (164 ft) Marking Description EXP+ EXP- GND expansion bus + signal expansion bus signal expansion bus common NOTE: There is no auxiliary power supply for the remote displays. Remote displays must be powered from an external power supply. Line Termination The dip-switch EXP TER is used to connect the 120 Ω/0.5 W resistor for line termination Communication and status indicator One red LED for status Bus provides the following information: Red LED Description Off Slow flashes Rapid flashes On Expansion bus off or expansion bus disabled using SoHVAC software Error detected on Modbus Error detected on expansion bus Error detected on expansion bus and Modbus EIO /

68 TM168B08PCBC Controller Expansion Bus Address Configuration Each device on the expansion bus must have a unique address. The M168 controller address is set by the hardware wizard in the SoHVAC software and is set during application download in the M168 controller. The TM168E21 expansion module has a default address of "2" set by the factory. The TM168GDB or TM168GDTS remote displays have a default address of "99" set by the factory. When the expansion bus Network has multiple devices with duplicated addresses, they can be adjusted using the CAN Config tool in the SoHVAC software, the controller or the remote display menus. Follow these steps to use the CAN Config tool in the SoHVAC software: Connect the programming cable to the programming port of the device Start the CAN Config tool in the Tools menu in SoHVAC software Select the COM port to communicate with the device Click Connect to read the device parameters Modifiy the parameters Click Apply to store the modified parameters into the device EIO /

69 TM168B08PCBC Controller Programming Port Programming Connector The TM168B08PCBC has a port, marked USB, dedicated to all programming functions. WARNING UNINTENDED EQUIPMENT OPERATION USB connection must not be used as a long-term connection. Failure to follow these instructions can result in death, serious injury, or equipment damage Memory The table indicates the characteristics of the memory: Characteristic Flash program memory RAM data storage memory Flash data memory Value 1024 kb 128 kb 8 Mb EIO /