Safety relays 3TK2845 multifunction device

Transcription

1 Important notes Table of Contents Product description 1 Safety relays 3TK2845 multifunction device Functional information 2 Technical data 3 Mounting, wiring, commissioning 4 Manual Applications 5 3TK2890-0B Edition 07/2015 NEB /RS-AC/005 Last update: 09 July 2015

2 Safety Notices This manual contains information that you should observe to ensure your own personal safety and prevent material damage. The instructions for your personal safety are marked by a safety alert symbol. Instructions relating solely to material damage are not marked by a safety alert symbol. Depending on the degree of hazard, the warning information is shown as follows in decreasing sequence: Danger indicates that death or serious injury will result if proper precautions are not taken. Warning indicates that death or severe personal injury may result if proper precautions are not taken. Caution with a safety alert symbol indicates that minor personal injury can result if proper precautions are not taken. Caution indicates that property damage may result if proper precautions are not taken. Notice indicates that an undesirable event or state may arise if the relevant notes are not observed. In the event of a number of levels of danger occurring simultaneously, the warning corresponding to the highest level of danger is always used. A warning on a safety alert symbol indicating possible personal injury may also include a warning relating to material damage. Qualified personnel The product/system to which this documentation relates may only be used/operated by personnel qualified for the respective tasks, taking account of the appropriate documentation for those tasks, in particular, the safety and warning notices contained in the documentation. Qualified personnel are defined as persons who are able, thanks to their training and experience in handling these products/systems, to recognize risks and avoid potential hazards. Intended use Note the following: Warning Siemens products may only be used for the applications described in the catalog and the associated technical documentation. If third-party products or components are to be used, they must be recommended or approved by Siemens. To ensure trouble-free and safe operation of the products, they must be appropriately transported, stored, assembled, installed, commissioned, operated and maintained. The permissible environmental conditions must be maintained. The notes in the associated documentation must be complied with. Copyright Siemens AG 2007 All rights reserved The reproduction, transmission, or use of this document or its contents is not permitted without express written authority. Offenders will be liable for damages. All rights, including rights created by patent grant or registration of a utility model or design are reserved. Disclaimer of liability We have reviewed the contents of this publication to ensure consistency with the hardware and software described. Since variance cannot be precluded entirely, we cannot guarantee full consistency. The information in this publication is reviewed regularly and any necessary corrections are included in subsequent editions. We welcome any suggestions for improvement. Technical Assistance: Phone: +49 (911) (8-17 CET) Fax: +49 (911) technical-assistance@siemens.com Internet: SIEMENS AG Industry Sector P.O. Box 4848 D Nuremberg, Germany Siemens AG 2007 Technical data subject to change.

3 Table of Contents 1 Product description TK2845 multifunction device Function, properties Several safety functions combined in one enclosure Examples of using 3TK2845 modules TK2845 order numbers Functional information General Function description Symbol description Versions TK2845-.HB.. "Monitored and automatic start" TK2845-.DB.. "Monitored start" TK2845-.EB.. "Enabling button" TK2845-.FB.. "Spring force interlocked tumbler" TK2845-.GB.. "Magnetic force interlocked tumbler" Technical data Technical data Terminals Terminal assignment Dimensional drawings Mounting, wiring, commissioning Mounting and coding Wiring Meaning of the LED indicators Applications TK2845-.HB40 "Monitored start and automatic start", instantaneous outputs TK2845-.HB41 "Monitored start and automatic start", time-delayed outputs TK2845-.DB40 "Monitored startup", instantaneous outputs TK2845-.DB41 "Monitored start", time-delayed outputs TK2845-.EB40 "Enabling button" TK2845-.FB41/2/4 "Spring force interlocked tumbler" TK2845-.GB41/2/4 "Magnetic force interlocked tumbler" NEB /RS-AC/005 i

4 ii NEB /RS-AC/005

5 Important notes Important notes Purpose of the manual The information provided in this manual is intended to assist with the configuration of safety-oriented functions as part of an overall installation or machine. Target group This manual is aimed at people with the required qualifications to commission and operate the 3TK2845 multifunction device. Scope of validity This manual applies to multifunction devices with the following order numbers: 3TK2845-.HB40 *) 3TK2845-.HB41 *) 3TK2845-.HB42 *) 3TK2845-.HB44 *) 3TK2845-.DB40 *) 3TK2845-.DB41 *) 3TK2845-.DB42 *) 3TK2845-.DB44 *) 3TK2845-.EB40 *) 3TK2845-.EB41 *) 3TK2845-.EB42 *) 3TK2845-.EB44 *) 3TK2845-.FB41 *) 3TK2845-.FB42 *) 3TK2845-.FB44 *) 3TK2845-.GB41 *) 3TK2845-.GB42 *) 3TK2845-.GB44 *) *) 8th position in order no.: 1 = screw terminal, 2 = spring-loaded terminal Shutdown response to power failure / device failure: On all 3TK28 devices, safety integrity level SIL CL 3 refers to the outputs with stop category 0. The time-delayed outputs are redundantly configured but cannot guarantee the set time in case of a failure (e.g. loss of power supply, device failure). These devices enter the safe state in the event of a failure, which always means that the outputs go to "zero" in this case. NEB /RS-AC/005 iii

6 Important notes Standards and approvals You can use the 3TK2845 safety relays in EMERGENCY-STOP facilities complying with ISO ( ) and in safety circuits complying with EN ( ), e.g. for moving covers and protective doors or contactless protective equipment conforming to IEC ( ). Depending on the external wiring, PL e in accordance with DIN EN ISO ( ) or SIL CL 3 in accordance with IEC 62061:2005 ( ) must be achieved. Installation note Measures to be taken to improve immunity to conducted radiofrequency interference: o Spatial separation of sensitive circuits from interference sources o Use of twisted-conductor cables o Sufficient distance between conductors emitting interference and the conductors of sensitive circuits o Right-angled crossing of cables and conductors where possible o Routing of the conductors as close as possible to the ground plane o Use of electrostatic / electromagnetic shields Disclaimer of liability The products described here have been developed to carry out safety-oriented functions as part of a complete plant or machine. A complete safety-oriented system generally features sensors, evaluation units, signaling units, and reliable shutdown concepts. It is the responsibility of the manufacturer to ensure that a system or machine is functioning properly as a whole. Siemens AG, its regional offices, and associated companies (hereinafter referred to as "Siemens") cannot guarantee all the properties of an entire plant, system or machine that has not been designed by Siemens. Nor can Siemens assume liability for recommendations that appear or are implied in the following description. No new guarantee, warranty, or liability claims above those standard to Siemens can be derived from the following description. Up-to-the-minute information You can obtain further assistance by calling the following numbers: Technical Assistance: Phone: +49 (911) (8-17 CET) Fax: +49 (911) or on the Internet at: technical-assistance@siemens.com Internet: SIEMENS AG, Technical Assistance Breslauer Str. 5 D Fuerth, Germany Correction sheet A correction sheet is included at the end of this manual. Please use it to enter your suggestions for improvements, additions and corrections, and send it back to us. This will help us to improve the next edition of the manual. iv NEB /RS-AC/005

7 Product description 1 Chapter Subject Page 1.1 3TK2845 multifunction device Function, properties TK2845 order numbers 1-7 NEB /RS-AC/

8 Product description 1.1 3TK2845 multifunction device Fig. 1-1: Illustration of the device version with screw connection, instantaneous enabling circuit Fig. 1-2: Illustration of the device version with spring-loaded terminals, delayed enabling circuits 1-2 NEB /RS-AC/005

9 Product description 1.2 Function, properties The 3TK2845 multifunction device is used to implement safety-related functions such as EMERGENCY-STOP monitoring, protective door monitoring and monitoring functions using contactless protective equipment (ESPE) such as light curtains and safety shutdown mats in machines with movable components. The device is especially suited for: Use on machines that operate without an interface to a bus system (stand-alone operation) Use on machines requiring several protection functions (e.g. EMERGENCY-STOP and a protective door, enabling button and protective door and locked protective door tumblers) Use on machines having components which must be switched off during operation (e.g. for servicing) The advantage of using this device is the fact that several safety-related functions can be implemented using only one 3TK2845 multifunction device rather than using several safety relays. In addition, the device is also suited for operational switching, cascading and adding safety relays either using contacts or switching electronically. Note: Under the link "Simulation safety switching device 3TK2845", you will find a simulation of the devices that will illustrate the functionality for you. NEB /RS-AC/

10 Product description Several safety functions combined in one enclosure Conventional design Until now, common combinations of safety applications such as EMERGENCY- STOP and protective door monitoring could only be implemented by using several individual safety relays (as in the example shown; Fig. 1-3). Fig. 1-3: Versions: 3TK2841 One safety relay required per safety function 1-4 NEB /RS-AC/005

11 Product description Configuration with 3TK2845 Multifunction devices of the 3TK2845 series combine several functions in one device. These devices are suitable for monitoring up to two safe 2-channel sensors and 1 safe 1-channel sensor (cascading input) and they also offer you the option of connecting a mode switch. Two solid-state enabling circuits and two relay enabling circuits ensure safe shutdown here. Fig. 1-4: Versions: 3TK2845 EMERGENCY-STOP and protective door monitoring + key-operated switch for bridging the protective door in maintenance mode NEB /RS-AC/

12 Product description Examples of using 3TK2845 modules Monitoring of EMERGENCY-STOP and positioning switches with possible maintenance for intervening in a secured area. Monitoring of position switches and possible operation using an enabling button in "unsafe" mode (maintenance). 1-6 NEB /RS-AC/005

13 Product description 1.3 3TK2845 order numbers Monitored and automatic start Screw terminal Spring-loeaded terminal Time delay 3TK2845-1HB40 3TK2845-2HB40 instantaneous 3TK2845-1HB41 3TK2845-2HB41 time-delayed s 3TK2845-1HB42 3TK2845-2HB42 time-delayed s 3TK2845-1HB44 3TK2845-2HB44 time-delayed s Monitored start Screw terminal Spring-loaded terminal Time delay 3TK2845-1DB40 3TK2845-2DB40 instantaneous 3TK2845-1DB41 3TK2845-2DB41 time-delayed s 3TK2845-1DB42 3TK2845-2DB42 time-delayed s 3TK2845-1DB44 3TK2845-2DB44 time-delayed s Enabling button Screw terminal Spring-loaded terminal Time delay 3TK2845-1EB40 3TK2845-2EB40 instantaneous 3TK2845-1EB41 3TK2845-2EB41 time-delayed s 3TK2845-1EB42 3TK2845-2EB42 time-delayed s 3TK2845-1EB44 3TK2845-2EB44 time-delayed s Spring force interlocked tumblers Screw terminal Spring-loaded terminal Time delay 3TK2845-1FB41 3TK2845-2FB41 time-delayed s 3TK2845-1FB42 3TK2845-2FB42 time-delayed s 3TK2845-1FB44 3TK2845-2FB44 time-delayed s Magnetic force interlocked tumblers Screw terminal Spring-loaded terminal Time delay 3TK2845-1GB41 3TK2845-2GB41 time-delayed s 3TK2845-1GB42 3TK2845-2GB42 time-delayed s 3TK2845-1GB44 3TK2845-2GB44 time-delayed s NEB /RS-AC/

14 Product description 1-8 NEB /RS-AC/005

15 Functional information 2 Chapter Subject Page 2.1 General Function description Symbol description Versions TK2845-.HB.. "Monitored and automatic start" TK2845-.DB.. "Monitored start" TK2845-.EB.. "Enabling button" TK2845-.FB.. "Spring force interlocked tumbler" TK2845-.GB.. "Magnetic force interlocked tumbler" 2-24 NEB /RS-AC/

16 Functional information 2.1 General SIRIUS safety relays and the safety chain A safety chain generally consists of the functions detection, evaluation and switching-off. Detection: This means the sensing of a safety requirement, e.g. when an EMERGENCY-STOP facility is actuated or a hazardous area protected by sensors such as light arrays or laser scanners is entered. Evaluation: This means the detection of a safety requirement and the safe initiation of the reaction (e.g. switching-off of the enabling circuits). This means the monitoring of the correct functioning of the actuator and the sensor. Switching-off: This means the switching-off of the hazard (e.g. of a power supply via the downstream contactors). SIRIUS safety relays play a role in the evaluation and reaction part of this safety chain. The safety functions are shown in a uniform schematic diagram (refer to Chapter 2.2) for a quick overview of the special functions of the individual device types. The sensor interface inputs, the actuator interface outputs and enabling circuits, as well as the special safety logic can all be seen at a glance. Cascading input 1. Safe linking of safety relays In this application a higher-level safety relay switches off the 3TK2845 via a safe output and the cascading input. Example: A -- higher-level -- EMERGENCY-STOP circuit must switch off the whole system. Several lower-level functional groups (e.g. protective doors) with local switch-off can be operated. Notice When faults are ruled out (protected laying of the control lead), the application's safety category corresponds to that of the higher-level safety relay. 2. Additional safety sensor circuit The cascading input is AND-connected with the sensor inputs Y12, Y22. PL c according to EN ISO , or SIL CL 2 according to IEC can be achieved when the cascading input is wired to single-channel safety sensors (positive opening) and the routing of the connecting cable is protected. The start function is set to automatic start. Cascading input 1 can be switched with floating or solid-state switching elements. Both types of switching elements must be fed by the same power supply as the device. 2-2 NEB /RS-AC/005

17 Functional information 3. Operational switching The cascading input can be used for operational (non-safe) switching. Switching is possible with floating or solid-state switching elements. Floating switching elements must be fed by the same power supply as the device. 4. Initial device start 4.1 Cross-circuit detection: o If a voltage of + 24 V DC is applied at Y35, cross-circuit evaluation between Y11/Y12 and Y21/Y22 is deactivated (necessary for non-floating sensors, e.g. light barriers). o If a voltage of + 24 V DC is applied at Y65, cross-circuit evaluation between Y41/Y42 and Y51/Y52 is deactivated (necessary for non-floating sensors, e.g. light barriers). o If no voltage is applied at Y35 or Y65, cross-circuit detection is active (necessary for pressure sensitive mats according to the cross-circuit principle, and non-floating sensors, e.g. EMERGENCY-STOP). Note: If 1-channel sensors are used, Y35 (in the case of 1-channel sensor on Y12 or Y22 or Y65 (in the case of 1-channel sensor on Y42 or Y52)) must be supplied with a voltage of +24 V DC. Note: If a pressure sensitive mat is used, it MUST be wired before switching on the device. Otherwise, the device will not detect the pressure sensitive mat, and a device fault will occur when the pressure sensitive mats are actuated. 5. Switch-on conditions o Voltage present at A1/A2. o Sensor circuit Y12/Y22 closed (exception in the case of variant 3TK2845-.EB4.). o Sensor circuit Y42/Y52 closed (exceptions during maintenance). o Cascading input supplied with 24 V DC. o Feedback circuit closed (supplied with 24 V DC). o An ON signal at Y34 is required for monitored start. For the safe monitoring of device function, sensors and actuators, the state of all input variables must remain unchanged for at least 400 ms after the 3TK2845 outputs drop out. If, for example, a sensor circuit is closed during this time, a device fault occurs that can only be remedied by resetting the supply voltage. NEB /RS-AC/

18 Functional information 6. Monitoring the ON button o Both the positive and negative signal change are monitored on the ON button. o If the ON button is pressed for longer than 5s, the ON command is rejected in the device and the device does NOT start when the ON button is released! o Monitored start requires status "1" at input Y34 as the start condition. When this condition is fulfilled, the safe outputs become active, that is, they are set to "1" (depending on the device version). The start signal at input Y34 is only valid when the following applies: - The time sequence of the START signal corresponds to the values " ". - The value "1" must be present for 0.2 to 5 s. 7. Use of a 1-channel sensor connection on Y11/12, Y21/22, or Y41/42, Y51/52 o If a single-channel sensor is to be connected to one of the two 2-channel sensor inputs, cross-circuit detection must be deactivated for this sensor circuit. The single-channel sensor must be supplied with an external + 24 V DC signal in this case. o If a single-channel sensor is desired at sensor input Y11/12, Y21/22, terminal Y35 must also be supplied with + 24 V DC o If a single-channel sensor is desired at sensor input Y41/42, Y51/52, terminal Y65 must also be supplied with + 24 V DC. 8. Monitoring the feedback circuits External actuators such as contactors or pneumatic valves are monitored with the feedback circuit. o The feedback circuit is tested for correct functioning when all enabling circuits are switched off (must be closed within 200 ms after switching off the enabling circuits). If the feedback circuit remains open after opening the enabling circuits, the device assumes a fault state (LED 24 & 44 flash). It must not be possible to switch the device on in this state. o An ON command is not accepted during a fault in the feedback circuit. o If the fault in the feedback circuit is corrected, the device can be started again as normal. o If an actuator with feedback is not used, feedback input Y64 must be supplied with 24 V DC. 2-4 NEB /RS-AC/005

19 Functional information Function description Automatic sensor detection Sensors such as EMERGENCY-STOP control devices or position switches and safety shutdown mats have different modes of operation. While EMERGENCY-STOP control devices, for example, interrupt the sensor circuit when activated, safety shutdown mats establish a cross-circuit between the two input channels of the evaluation system when stepped on. This means that 1. in the case of a sensor which interrupts the sensor circuit, a cross-circuit leads to a fault. 2. in the case of safety shutdown mats an interruption of the sensor circuit leads to a fault. All safety shutdown mats and switching strips operating in a 4-wire configuration that work in accordance with the principle of cross-circuit tripping can be connected to the 3TK2845 safety relay. The tripping of the 3TK2845 is initiated by a cross-circuit in the sensor cables. If the safety shutdown mat resistance is < 1000 Ω for the mat + the connecting leads, safe evaluation is performed in accordance with DIN EN and DIN EN The 3TK2845 automatically detects the mode of operation of the connected sensor. If, during first activation of the sensor after a device restart, 1. opening of the sensor circuits is detected, the 3TK2845 only accepts sensors which open the sensor circuits (floating NC contacts such as EMERGENCY-STOP control devices or position switches). A cross-circuit between the sensor circuits leads to a fault. 2. a cross-circuit is detected between the sensor circuits, the 3TK2845 only accepts sensors causing a sensor circuit short-circuit (safety shutdown mats). Opening of the sensor circuits leads to a fault. NEB /RS-AC/

20 Functional information Symbol description Explanation of symbols Symbol Meaning START button EMERGENCY-STOP Protective door Enabling button Light curtain, light array, light barrier Safety shutdown mat Cross-circuit monitoring Feedback circuit Key-operated switch Table 2-1: Explanation of symbols 2-6 NEB /RS-AC/005

21 Functional information 2.2 Versions TK2845-.HB.. "Monitored and automatic start" The 3TK2845-.HB.. has two sensor inputs (Y11/12; Y21/22) with monitored start, (Y41/42; Y51/52 with automatic start), one cascading input (1, with automatic start) as well as one switching input (key-operated switch). On the output side there are two relay and two enabling circuits and two solid-state enabling circuits as well as one solid-state signaling output. Standard operation In standard operation (key-operated switch "OFF") all enabling circuits are activated. All input blocks are AND-connected to one another and affect all enabling circuits at the same time. Some are time-delayed (in the versions: 3TK2845-.HB41; -.HB42; -.HB44). Maintenance During maintenance (key-operated switch "ON") only two of the four enabling circuits are activated. In this case, sensor input Y42/Y52 (e.g. protective door) has no function. The hazardous area can be entered since the dangerous motion has been switched off via the two inactive enabling circuits. The sensor input Y12/Y22 and the cascading input (1, with automatic start) still affect the active enabling circuits. Monitored start is required: o At initial start after applying the control supply voltage. o After opening and closing sensor circuits Y12/Y22 (even if this is followed by deactivation and reactivation of cascading!) Automatic start takes place: o After closing sensor circuits Y42/Y52 (following "standard operation") o After activation of the cascading input (not on first switching on the device AND after opening and closing of the sensor on Y12/Y22). o After exiting maintenance mode (not if the sensor on Y12/Y22 has been actuated!) NEB /RS-AC/

22 Functional information Outputs: o Standard operation (Y72/Y82 at 0 V): All enabling circuits (13/14, 24, 33/34, 44 or 13/14, 24, 37/38, 48 with the time-delayed versions 3TK2845-.HB41; -.HB42; -.HB44), some time-delayed, switch on with the Start command or on closing of sensor circuit Y42/Y52 (automatic start, if Y12/Y22 was not opened). All enabling circuits are deactivated by actuating a sensor Signaling circuit 52 always switches inversely to the enabling circuits o Maintenance (Y72/Y82 at 24 V DC): If sensor circuit Y12/Y22 or the cascading input (1, with automatic start) is opened during maintenance, all enabling circuits switch off, and signaling circuit 52 is active. Starting maintenance mode from the idle condition: Enabling circuits 13/14 and 24 (13/14 and 48 with the time-delayed versions) switch on with the Start command (if all other switch-on conditions are met at the same time). Enabling circuits 13/14 and 24 switch on when the key-operated switch is actuated (24 V DC at Y72/Y82) regardless of the status at input Y42/Y52 (if the sensor at Y42/Y52 was the only cause of switching off). Signaling circuit 52 pulses with a frequency of 1.2 Hz. Starting maintenance from standard operation (all enabling circuits active). Enabling circuits 33/34 and 44 switch off when maintenance mode is selected, but enabling circuits 13/14 and 24 remain active. Signaling circuit 52 pulses with a frequency of 1.2 Hz. 2-8 NEB /RS-AC/005

23 Functional information Status diagrams Standard Normalbetrieb operation Maintenance Servicebetrieb Standard Normalbetrieb operation Y34 Inputs Eingänge 1 Y12/22 Y42/52 Changeover Umschaltung from Normal- standard / operation Servicebetrieb to maintenance - Y72/82 13/14 Outputs Ausgänge 24 33/ Fig. 2-1: Status diagram: 3TK2845-.HB40 Standard Normalbetrieb operation Maintenance Servicebetrieb Y34 Inputs Eingänge 1 Y12/22 Y42/52 Changeover Umschaltung from Normal- standard / operation Servicebetrieb to maintenance Y72/82 13/14 Outputs Ausgänge 24 37/ t v tv tv tv tv tv Fig. 2-2: Status diagram: 3TK2845-.HB41 NEB /RS-AC/

24 Functional information Connections: Monitored and automatic start instantaneous Inputs (sensors) Outputs (enabling circuit) Sensor Terminals Description Description Terminals 1 Cascading Safe relay output instantaneous or or Y11 Y12 Y21 Y22 Sensor connection Safe solid-state output instantaneous 240 or Y34 START button Y35 refers to Y11/Y12, Y21/Y22 - with cross-circuit detection (not connected) - without cross-circuit detection (with 24V DC = terminal A1 connected) Safe relay output instantaneous or or Y41 Y42 Y51 Y52 Sensor connection Safe solid-state output instantaneous 44 Y65 refers to Y41/Y42, Y51/Y52 Y72 Y82 - with cross-circuit detection (not connected) - without cross-circuit detection (with 24V DC = terminal A1 connected) Key-operated switch Solid-state signaling output 1) (must not be used for safety-related applications) 52 Y64 External device monitoring circuit 1) Solid-state signaling output Enabling circuits active: Enabling circuits inactive: Key-operated switch operation: Signaling output OFF Signaling output ON Signaling output clocked (approx. 1.2 Hz) 2-10 NEB /RS-AC/005

25 Functional information Connections: Monitored and automatic start, time-delayed Inputs (sensors) Outputs (enabling circuit) Sensor Terminals Description Description Terminals 1 Cascading Safe relay output instantaneous or or Y11 Y12 Y21 Y22 Sensor connection Safe solid-state output instantaneous 24 or Y34 START button Y35 refers to Y11/Y12, Y21/Y22 - with cross-circuit detection (not connected) - without cross-circuit detection (with 24V DC = terminal A1 connected) Safe relay output time-delayed or or Y41 Y42 Y51 Y52 Sensor connection Safe solid-state output time-delayed 48 Y65 refers to Y41/Y42, Y51/Y52 Y72 Y82 - with cross-circuit detection (not connected) - without cross-circuit detection (with 24V DC = terminal A1 connected) Key-operated switch Solid-state signaling output 1) (must not be used for safety-related applications) 52 Y64 External device monitoring circuit 1) Solid-state signaling output Enabling circuits active: Enabling circuits inactive: Key-operated switch operation: Signaling output OFF Signaling output ON Signaling output clocked (approx. 1.2 Hz) NEB /RS-AC/

26 Functional information TK2845-.DB.. "Monitored start" The 3TK2845-.DB.. has two sensor inputs (Y42/Y52, Y12/Y22 with monitored start), one cascading input (1, with automatic start) as well as one switching input (key-operated switch). On the output side there are two relay and two enabling circuits and two solid-state enabling circuits as well as one solid-state signaling output. Standard operation In standard operation (key-operated switch "OFF") all enabling circuits are activated. All input blocks are AND-connected to one another and affect all enabling circuits at the same time. Some are time-delayed (in the versions: 3TK2845-.DB41; -.DB42; -.DB44). Maintenance During maintenance (key-operated switch "ON") only two of the four enabling circuits are activated. In this case, sensor input Y42/Y52 (e.g. protective door) has no function. The hazardous area can be entered since the dangerous motion has been switched off via the two inactive enabling circuits. The sensor input Y12/Y22 and the cascading input (1, with automatic start) still affect the active enabling circuits. A monitored start is required: o At initial start of the device. o After opening one or both sensor circuits (Y12/Y22 or Y42/Y52). o After exiting maintenance mode, if the protective door has been opened. Automatic start takes place if: o Cascading input 1 (if no Y12/Y22 or Y42/Y52 sensor has been actuated previously). o Service switch Y72/Y82 (if the protective door has not been opened during maintenance). Outputs: o Standard operation (Y72/Y82 at 0 V): All enabling circuits (13/14, 24, 33/34, 44; or 13/14, 24, 37/38, 48 with the time-delayed versions 3TK2845-.DB41; -.DB42; -.DB44), some time-delayed, switch on with the Start command. All enabling circuits are deactivated by actuating a sensor. Signaling circuit 52 always switches inversely to the enabling circuits. o Maintenance (Y72/Y82 at 24 V DC): If sensor circuit Y12/Y22 or the cascading input (1, with automatic start) is opened during maintenance, all enabling circuits switch off, and signaling circuit 52 is active. Starting maintenance mode from the idle condition: Enabling circuits 13/14 and 24 (13/ and 48 with the time-delayed versions) switch on with the Start command regardless of the status at sensor input Y42/Y52 (if all other switch-on conditions are met at the same time). Signaling circuit 52 pulses with a frequency of 1.2 Hz. Starting maintenance from standard operation (all enabling circuits active) Enabling circuits 33/44 and 44 switch off when maintenance mode Y72/Y82 is selected, but enabling circuits 13/14 and 24 remain active. Signaling circuit 52 pulses with a frequency of 1.2 Hz NEB /RS-AC/005

27 Functional information Status diagrams Standard Normalbetrieb operation Maintenance Servicebetrieb Standard Normalbetrieb operation Y 34 Inputs Eingänge 1 Y 12/22 Y 42/52 Changeover Umschaltung from Normal- standard / Servicebetrieb operation to maintenance - Y 72/82 13/14 Outputs Ausgänge 24 33/ Fig. 2-3: Status diagram: 3TK2845-.DB40 Y34 Inputs Eingänge 1 Y12/22 Y42/52 Y72/82 13/14 Outputs Ausgänge 24 37/ t v t v t v Fig. 2-4: Status diagram: 3TK2845-.DB41 NEB /RS-AC/

28 Functional information Inputs (sensors) Connections: Monitored start instantaneous Outputs (enabling circuit) Sensor Terminals Description Description Terminals 1 Cascading Safe relay output instantaneous or or Y11 Y12 Y21 Y22 Sensor connection Safe solid-state output instantaneous 24 or Y34 START button Y35 refers to Y11/Y12, Y21/Y22 - with cross-circuit detection (not connected) - without cross-circuit detection (with 24V DC = terminal A1 connected) Safe relay output instantaneous or or Y41 Y42 Y51 Y52 Sensor connection Safe solid-state output instantaneous 44 Y65 refers to Y41/Y42, Y51/Y52 Y72 Y82 - with cross-circuit detection (not connected) - without cross-circuit detection (with 24V DC = terminal A1 connected) Key-operated switch Solid-state signaling output 1) (must not be used for safety-related applications) 52 Y64 External device monitoring circuit 1) Solid-state signaling output Enabling circuits active: Enabling circuits inactive: Key-operated switch operation: Signaling output OFF Signaling output ON Signaling output clocked (approx. 1.2 Hz) 2-14 NEB /RS-AC/005

29 Functional information Connections: Monitored start time-delayed Inputs (sensors) Outputs (enabling circuit) Sensor Terminals Description Description Terminals 1 Cascading Safe relay output instantaneous or or Y11 Y12 Y21 Y22 Sensor connection Safe solid-state output instantaneous 24 or Y34 START button Y35 refers to Y11/Y12, Y21/Y22 - with cross-circuit detection (not connected) - without cross-circuit detection (with 24V DC = terminal A1 connected) Safe relay output time-delayed or or Y41 Y42 Y51 Y52 Sensor connection Safe solid-state output time-delayed 48 Y65 refers to Y41/Y42, Y51/Y52 Y72 Y82 - with cross-circuit detection (not connected) - without cross-circuit detection (with 24V DC = terminal A1 connected) Key-operated switch Solid-state signaling output 1) (must not be used for safety-related applications) 52 Y64 External device monitoring circuit 1) Solid-state signaling output Enabling circuits active: Enabling circuits inactive: Key-operated switch operation: Signaling output OFF Signaling output ON Signaling output clocked (approx. 1.2 Hz) NEB /RS-AC/

30 Functional information TK2845-.EB.. "Enabling button" The 3TK2845-.EB.. has two sensor inputs (Y12/Y22 enabling button with automatic start, Y42/Y52 protective door with monitored start/automatic start), one cascading input (1, with automatic start) as well as one switching input (key-operated switch). On the output side there are two relay and two enabling circuits and two solid-state enabling circuits as well as one solid-state signaling output. Standard operation In standard operation (key-operated switch "OFF") all enabling circuits are activated. The cascading input (1, with automatic start) and the protective door input Y42/Y52 are AND-connected with each other and affect all enabling circuits at the same time. Some are time-delayed. Input Y12/Y22 for the enabling button has no function in this context. The opening of the protective door or a missing signal at the cascading input CAS/OS deactivates all enabling circuits. Maintenance During maintenance (key-operated switch "ON") only two of the four enabling circuits are activated. In this case, sensor input Y42/Y52 (e.g. protective door) has no function. The hazardous area can be entered since the dangerous motion has been switched off via the two inactive enabling circuits. The dangerous motion can be started again via the enabling button at sensor input Y12/Y22 despite the protective door being open. Parameterization for monitored/automatic start for sensor circuit Y42/Y52: o If Y32 is at 24 V DC, the device powers up in automatic start. o If there is no voltage at Y32, the device powers up in monitored start. - If the protective door is not opened during maintenance, all enabling circuits close automatically on exiting maintenance mode. This applies to both monitored start and automatic start. If "monitored start" is parameterized: - A monitored start is required: o At initial start after applying the control supply voltage. o After opening and closing sensor circuits Y42/Y52 (even if this is followed by deactivation and reactivation of cascading!) - Automatic start takes place: o After activation of the cascading input (not on first switching of the device AND after opening and closing of the sensor on Y12/Y22 if maintenance mode is not selected). o After exiting maintenance mode (if Y42/Y52 has not been actuated). If "automatic start" is parameterized: o After the switch-on conditions have been met, all enabling circuits switch in (not in maintenance mode!) 2-16 NEB /RS-AC/005

31 Functional information Outputs: - Standard operation (Y72/Y82 at 0 V): o All enabling circuits (13/14, 24, 33/34, 44; or. 13/14, 24, 37/38, 48 with the time-delayed versions 3TK2845-.EB41; -.EB42; -.EB44) switch on with the Start command All enabling circuits are deactivated by actuating the sensor circuit Y42/Y52. o Signaling circuit 52 always switches inversely to the enabling circuits. - Maintenance (Y72/Y82 at 24 V DC): General: If cascading input 1 is opened during maintenance, all enabling circuits switch off, and signaling circuit 52 is active. o When exiting maintenance mode, all enabling circuits switch on only after a renewed Start command (if Y42/Y52 has been actuated). Starting maintenance mode from the idle condition: o Enabling circuits 13/14 and 24 switch on with the Start command regardless of the status at sensor input Y12/Y22 (if all other switch-on conditions are met at the same time). o Outputs 33/34 and 44 (37/38 and 24 with the time-delayed versions) can be activated in maintenance mode with the enabling button (even if door Y12/Y22 is opened). o Signaling circuit 52 pulses with a frequency of 1.2 Hz. Starting maintenance from standard operation (all enabling circuits active). o Enabling circuits 33/44 and 44 (24, 37/38 with the time-delayed versions) switch off when maintenance mode Y72/Y82 is selected, but enabling circuits 13/14 and 24 remain active. o Outputs 33/34 and 44 (37/38 and 24 with the time-delayed versions) can be activated in maintenance mode with the enabling button (even if door Y12/Y22 is opened). o Signaling circuit 52 pulses with a frequency of 1.2 Hz. NEB /RS-AC/

32 Functional information Status diagrams Standard Normalbetrieb operation Maintenance Servicebetrieb Standard Normalbetrieb operation Y34 Inputs Eingänge 1 Y12/22 Y42/52 Changeover Umschaltung from Normal- standard / operation Servicebetrieb to maintenance Y72/82 13/14 Outputs Ausgänge 24 33/ Fig. 2-5: Status diagram: 3TK2845-.EB40 Standard Normalbetrieb operation Maintenance Servicebetrieb Standard Normalbetrieb operation Y34 Inputs Eingänge 1 Y12/22 Y42/52 Changeover Umschaltung from Normal- standard - / Servicebetrieb operation to maintenance -/Servicebetrieb Y72/82 13/14 Ausgänge Outputs 24 37/ t v t v t v t v t v t v Fig. 2-6: Status diagram: 3TK2845-.EB NEB /RS-AC/005

33 Functional information Connections: Enabling button instantaneous Inputs (sensors) Outputs (enabling circuit) Sensor Terminals Description Description Terminals 1 Cascading Safe relay output 13 Y11 Y12 instantaneous 14 Y21 Y22 Sensor connection Safe solid-state output instantaneous 24 or or Y41 Y42 Y41 Y42 Sensor connection Safe relay output instantaneous Y34 START button Y32 - Monitored start (not connected) - Automatic start (with 24 V DC = terminal A1 connected) Safe solid-state output instantaneous 44 Y65 refers to Y41/Y42, Y51/Y52 Y72 Y82 - with cross-circuit detection (not connected) - without cross-circuit detection (with 24V DC = terminal A1 connected) Key-operated switch Solid-state signaling output 1) (must not be used for safety-related applications) 52 Y64 External device monitoring circuit 1) Solid-state signaling output Enabling circuits active: Enabling circuits inactive: Key-operated switch operation: Signaling output OFF Signaling output ON Signaling output clocked (approx. 1.2 Hz) NEB /RS-AC/

34 Functional information Inputs (sensors) Connections: Enabling button time-delayed Outputs (enabling circuit) Sensor Terminals Description Description Terminals 1 Cascading Safe relay output Y11 instantaneous Y12 Y21 Y22 Sensor connection Safe solid-state output instantaneous or or Y41 Y42 Y51 Y52 Sensor connection Safe relay output instantaneous Y34 START button Y32 - Monitored start (not connected) - Automatic start (with 24 V DC = terminal A1 connected) Safe solid-state output instantaneous 48 Y65 refers to Y41/Y42, Y51/Y52 Y72 Y82 - with cross-circuit detection (not connected) - without cross-circuit detection (with 24V DC = terminal A1 connected) Key-operated switch Solid-state signaling output 1) (must not be used for safety-related applications) 52 Y64 External device monitoring circuit 1) Solid-state signaling output Enabling circuits active: Enabling circuits inactive: Key-operated switch operation: Signaling output OFF Signaling output ON Signaling output clocked (approx. 1.2 Hz) 2-20 NEB /RS-AC/005

35 Functional information TK2845-.FB.. "Spring force interlocked tumbler" The 3TK2845-.FB.. has two sensor inputs (Y12/Y22 EMERGENCY-STOP with monitored start, Y42/Y52 protective door with tumbler and monitored start), one cascading input (1, with automatic start) as well as one door enable input. On the output side there are one relay enabling circuit and two solid-state enabling circuits as well as a solenoid control output and a solid-state signaling output. Not enabled If the protective door is not enabled, it cannot be opened. Cessation of the signal at the inputs Y12/Y22 or at the cascading input (1, with automatic start) deactivates the enabling circuits. Enabled The solenoid control output and the second solid-state enabling circuit are activated via a signal to the door enable input after the delay time has passed. This enables the protective door. A monitored start is required: o At initial start of the device. o After opening one or both sensor circuits (Y12/Y22 or Y42/Y52). o After cessation of the door enable (Y82), if the protective door has been opened. Automatic start takes place only: o In the case of a cascading input (if no sensor has been actuated previously). o After cessation of the door enable, if the protective door has not been opened. Outputs: o Standard operation (Y82 at 24 V): Enabling circuits 13/14 and 24 switch on with the Start command. Enabling circuits 13/14 and 24 are deactivated by actuating a sensor. Signaling circuit 52 always switches inversely to the enabling circuits. o Door enabling mode (Y82 at 0 V DC): In the mode for door enabling, outputs 13/14 and 24 are always inactive. Starting the mode for door enabling from the idle condition: Enabling circuits 37/38 and 48 are inactive, and the spring force interlocked tumbler remains enabled (protective door can be opened). Signaling circuit 52 pulses with a frequency of 1.2 Hz. Starting the mode for door enabling from standard operation (all enabling circuits active) Enabling circuits 13/14 and 24 switch off when maintenance Y82 is selected, and enabling circuits 37/38 and 48 switch off after the set time and enable the door tumbler. Signaling circuit 52 pulses with a frequency of 1.2 Hz. NEB /RS-AC/

36 Functional information Status diagram Y34 Start Door Standard Standard Norm albetrieb operation enabling Türfreigabe Norm al Inputs Eingänge 1 Y12/22 Y42/52 Y72 Cascading Kaskadier EMERGENCY NOT HALT Überwacht Stop monitored Protective Schutztür door Überwacht monitored Magnetüberwachung monitoring Y82 Door Türfreigabe enabling Outputs Ausgänge 13/ /38 48 OUT1 OUT2 OUT3 door Türverriegelung interlock OUT4 door Türverriegelung interlock 52 Signaling Meldeausgang output Fig. 2-7: Status diagram: 3TK2845-.FB4. t v 2-22 NEB /RS-AC/005

37 Functional information Connections: Spring force interlocked tumbler Inputs (sensors) Outputs (enabling circuit) Sensor Terminals Description Description Terminals 1 Cascading Safe relay output 13 Y11 instantaneous 14 Y12 Y21 Y22 Y34 Sensor connection START button Safe solid-state output instantaneous 24 Y35 - with cross-circuit detection (not connected) - without cross-circuit detection (with 24V DC = terminal A1 connected) Safe relay output switch-on delay e.g. for door interlock or or Y41 Y42 Y51 Y52 Sensor connection Safe solid-state output switch-on delay e.g. door interlock 48 Y65 refers to Y41/Y42, Y51/Y52 Y72 Y82 Y64 - with cross-circuit detection (not connected) - without cross-circuit detection (with 24V DC = terminal A1 connected) Magnet monitoring Door enable External device monitoring circuit Solid-state signaling output 1) (must not be used for safety-related applications) 52 1) Solid-state signaling output Enabling circuits active: Enabling circuits inactive: Key-operated switch operation: Signaling output OFF Signaling output ON Signaling output clocked (approx. 1.2 Hz) NEB /RS-AC/

38 Functional information TK2845-.GB.. "Magnetic force interlocked tumbler" The 3TK2845-.GB.. has two sensor inputs (Y12/Y22 EMERGENCY-STOP with monitored start, Y42/Y52 protective door with tumbler and monitored start), one cascading input (1, with automatic start) as well as one door enable input. On the output side there are one relay enabling circuit and two solid-state enabling circuits as well as a relay solenoid control output and a solid-state signaling output. Not enabled If the protective door is not enabled, it cannot be opened. Cessation of the signal at the inputs Y12/Y22 or at the cascading input (1, with automatic start) deactivates the enabling circuits (13, 14; 24). Enabled The solenoid control output and the second solid-state enabling circuit are deactivated via a signal to the door enable input after the delay time has passed. This enables the protective door. A monitored start is required: o At initial start of the device. o After opening one or both sensor circuits (Y12/Y22 or Y42/Y52). o After closing the door enable, if the protective door has been opened. Automatic start only: o In the case of a cascading input (if no sensor has been actuated previously). o After closing the door enable, if the protective door has not been opened. Outputs: o Standard operation (Y82 at 24 V DC): Enabling circuits 13/14 and 24 switch on with the Start command. Enabling circuits 13/14 and 24 are deactivated by actuating a sensor. Signaling circuit 52 always switches inversely to the enabling circuits. o Door enabling mode (Y82 at 0 V DC) In the mode for door enabling, outputs 13/14 and 24 are always inactive. Starting the mode for door enabling from the idle condition: Enabling circuits 37/38 and 48 are inactive, and the magnetic force interlocked tumbler remains enabled (protective door can be opened). Signaling circuit 52 pulses with a frequency of 1.2 Hz. Starting the mode for door enabling from standard operation (all enabling circuits active): Enabling circuits 13/14 and 24 switch off when door enabling is selected (Y82 at 0 V DC), and the magnetic force interlocked tumbler becomes inactive after the set time (protective door can be opened). Signaling circuit 52 pulses with a frequency of 1.2 Hz NEB /RS-AC/005

39 Functional information Status diagram Y34 Start Standard Norm albetrieb operation Türfreigabe Door Standard Norm al enabling Inputs Eingänge 1 Y12/22 Y42/52 Cascading Kaskadier EMERGENCY NOT HALT Überwacht Stop monitored Protective Schutztür door Überwacht monitored Y72 Y82 Magnetüberwachung monitoring Door Türfreigabe enabling Outputs Ausgänge 13/ /38 48 OUT1 OUT2 OUT3 door Türverriegelung interlock OUT4 door Türverriegelung interlock 52 Signaling Meldeausgang output Fig. 2-8: Status diagram: 3TK2845-.GB4. t v NEB /RS-AC/

40 Functional information Connections: magnetic force interlocked tumbler Inputs (sensors) Outputs (enabling circuit) Sensor Terminals Description Description Terminals 1 Y11 Cascading Safe relay output instantaneous Y12 Sensor connection Y21 Y22 Safe solid-state output Y34 START button instantaneous Y35 refers to Y11/142, Y21/Y22 - with cross-circuit detection (not connected) - without cross-circuit detection (with 24V DC = terminal A1 connected) Safe relay output off-delay e.g. door interlock or or Y41 Y42 Y51 Y52 Sensor connection Safe solid-state output off-delay e.g. door interlock 48 Y65 refers to Y41/Y42, Y51/Y52 Y72 Y82 Y64 - with cross-circuit detection (not connected) - without cross-circuit detection (with 24V DC = terminal A1 connected) Magnet monitoring Door enable External device monitoring circuit Solid-state signaling output 1) (must not be used for safety-related applications) 52 1) Solid-state signaling output Enabling circuits active: Enabling circuits inactive: Key-operated switch operation: Signaling output OFF Signaling output ON Signaling output clocked (approx. 1.2 Hz) 2-26 NEB /RS-AC/005

41 Technical data 3 Chapter Subject Page 3.1 Technical data Terminals Terminal assignment Dimensional drawings 3-6 NEB /RS-AC/

42 Technical data 3.1 Technical data Type 3TK Standards EN , EN ISO , IEC EMC EN Category in accordance with DIN EN PL e /CAT 4 Safety Integrity Level Claim Limit (SIL CL) 3 Test verification documents Overvoltage category Rated insulation voltage U i Rated impulse withstand voltage U imp Rated control supply voltage V s Operating range Rated power Short-circuit protection TÜV II 300 V 2,5 kv 24 V DC 0,85 to 1,15 U s 5 W Switching frequency z during rated operation /h Response time Release time, (stop category 0) in the case of EMERGENCY-STOP Release time, (Stop category 1) at the safe outputs during EMERGENCY-STOP Supply power buffering Recovery time during EMERGENCY-STOP/ power failure Minimum EMERGENCY-STOP command time START button command time Permissible ambient temperature T a during operation and storage Total resistance of sensor circuit R SG Total capacity of sensor circuit C SG Degree of protection according to EN 60529, enclosure/terminals Touch protection, DIN VDE 0106, Part 100 Weight Permissible mounting position Semiconductor outputs: Short-circuit-proof Use 4 A gl/gg or quick-response fuse-links for the floating safe outputs, e.g. LV HRC type 3NA, DIAZED type 5SB, NEOZED type 5SE Max. 60 ms 45 ms Max. 300 seconds (adjustable) 25 ms At least 200 ms/at least 8 seconds 30 ms 0.2 to 5 seconds 25 to +60 C/ 40 to +80 C Max. 250Ω max. 500 nf IP20 Finger-safe 0.4 kg Shock resistance Sine wave 8/10 and 15/5 g/ms PFH D 6.86 x 10-9 Any PFD 6.1 x 10-4 Table 3-1: Technical data 3-2 NEB /RS-AC/005

43 Technical data Type 3TK HFT 1 Lifetime 20 years SFF [%] > 90 % T1 20 years Table 3-1: Technical data (Contd.) Data sheet You can find all the technical data of the product in the Siemens Industry Online Support. 1. Enter the full article number of the desired device in the "Product" field, and confirm with the Enter key. 2. Click the "Technical data link. NEB /RS-AC/