Serial Interface Modules TTL to RS232/RS485/RS422

USERS MANUAL Serial Interface Modules TTL to RS232/RS485/RS422 The modules converts serial TTL signals to RS232 or RS485/RS422. They are available in several different configuration such as directly mountable on MPL s Single Board Computers (ie. PIP9, MIP440GX) or as external modules (useable for MIP405, VCMA9). The RS232 modules converts the 3 TTL Signals to RS232 Signals and 5 RSR232 Signals to TTL Signals. The RS485/RS422 modules are galvanic isolated and no external power supply is needed. Features Availabe in several different configurations: RS232 Modules: 3 TTL to RS232 signal converter 5 RS232 to TTL signal converter up to 20kbps Data Rate ESD Protected RS485/RS422 Modules: completely galvanic isolated either 4 wire (Full-duplex RS485) or 2 wire (Half-duplex RS422) configuration. up to 250kbps Data Rate ESD Protected 2004 by MPL AG MEH-008-00 Rev. A

TABLE OF CONTENTS. INTRODUCTION...3. About this manual...3.2 Safety precautions and handling...3.3 Electrostatic discharge (ESD) protection...3.4 Equipment safety...3 2. VARIANTS...4 2. Full-Build-In Modules -/-2...5 2.. Mounting -/-2 Modules...5 2.2 Half-Build-In Modules -3/-4...5 2.2. Mounting -3/-4 Modules...5 2.3 External Modules -5/-6...6 2.3. Connecting -5/-6 Modules...6 3. DIMENSIONS...6 3. Top view Dimensions Full-Build-In Modules...6 3.2 Top view Dimensions Half-Build-In and External Modules...7 3.3 Height Dimension of -...7 3.4 Height Dimension of -2...8 3.5 Height Dimension of -3...8 3.6 Height Dimension of -4...8 3.7 Height Dimension of -5...9 3.8 Height Dimension of -6...9 4. PARTS LOCATION...0 4. Top View...0 4.2 Bottom View...0 4.3 Switch Settings... 4.3. S: RS485/422 Termination... 4.4 Connectors... 4.4. J 9Pin D-Sub RS232/RS485/422 Signal Connector... 4.4.2 J2 2Pin 2mm female header RS232/RS485/422 Signal Connector... 4.4.3 J3 0Pin 2mm female header TTL-in Connector...2 4.4.4 J4 0Pin 2mm male header TTL-in Connector...2 5. OPERATION...3 5. RS232...3 5.2 RS485/RS422...4 5.2. Differences between RS485 and RS422...4 5.2.2 Block Diagram...5 5.2.3 RS422 Configuration...5 5.2.4 RS485 Configuration...5 6. ELECTRICAL SPECIFICATION...6 6. RS232 Modules (-/-3/-5)...6 6.. TTL Signals...6 6..2 RS232 Signals...6 6..3 AC Characteristic and ESD Protection...6 6.2 RS485/422 Modules (-2/-4/-6)...6 6.2. TTL Signals...6 6.2.2 RS485 Signals...6 6.2.3 AC Characteristic and Isolation Voltage...7 7. SUPPORT INFORMATION...8 2004 by MPL AG 2 MEH-008-00 Rev. A

High-Tech Made in Switzerland. Introduction. About this manual This manual assists the installation procedure by providing all hardware related information necessary to handle and configure the Modules..2 Safety precautions and handling For personal safety and safe operation of the Modules, follow all safety procedures described here and in other sections of the manual. Power must be removed from the system before installing (or removing) the Modules X to prevent the possibility of personal injury (electrical shock) and/or damage to the product. Handle the product carefully, i.e., dropping or mishandling the Modules can cause damage to assemblies and components. Do not expose the equipment to moisture. WARNING There are no user-serviceable components on the Modules.3 Electrostatic discharge (ESD) protection Various electrical components within the product are sensitive to static and electrostatic discharge (ESD). Even a nonsensible static discharge can be sufficient to destroy or degrade a component's operation!.4 Equipment safety Great care is taken by MPL that all its products are thoroughly and rigorously tested before leaving the factory to ensure that they are fully operational and conform to specification. However, no matter how reliable a product, there is always the remote possibility that a defect may occur. The occurrence of a defect on this device may, under certain conditions, cause a defect to occur in adjoining and/or connected equipment. It is the user s responsibility to ensure that adequate protection for such equipment is incorporated when installing this device. MPL accepts no responsibility whatsoever for such kind of defects, however caused. 2004 by MPL AG 3 MEH-008-00 Rev. A

High-Tech Made in Switzerland 2. Variants Several Variants of the modules exists. The table below shows the variants versus their options: Name RS232 RS485 Full-Build-In Module used in PIP9, MIP440GX - -2 Half Build-In Module used in MIP440GX -3-4 External Module used for MIP405, VCMA9-5 -6 Table 2- Variants 2004 by MPL AG 4 MEH-008-00 Rev. A

High-Tech Made in Switzerland 2. Full-Build-In Modules -/-2 modules /-2 are intented for a Full-Build-In into MPL s Single Board Computers such as PIP9 or MIP440GX. Full-Build-In means, that the module is mounted on the SBC and the Input and Output Connectors are connected to the SBC. 2.. Mounting -/-2 Modules 0 O N 2 Figure 2- Mounting -2 on a PIP9 2.2 Half-Build-In Modules -3/-4 modules 3/-4 are intented for a Half-Build-In into MPL s Single Board Computers such as MIP440GX. Half- Build-In means, that the module is mounted on the SBC and only the Input Connector is connected to the SBC. The Output Connector consists of a 9Pin D-Sub male and is directly avaiable on the Front Plate. 2.2. Mounting -3/-4 Modules O N Figure 2-2 Mounting -4 on a MIP440GX 2004 by MPL AG 5 MEH-008-00 Rev. A

2.3 External Modules -5/-6 modules 5/-6 are not intented for mounting on a base board or SBC. The Input connector can be connected with a flat ribon cable to a MIP405 or VCMA9 and the RS232 or RS485/422 signals are avaiable an a 9Pin D-Sub male connector. 2.3. Connecting -5/-6 Modules 2 2 O N 90 90 Figure 2-3 Connecting a -6 Module to a MIP405 COMA Note: Please take care to connect Pin of the to Pin of the SBC 3. Dimensions 3. Top view Dimensions Full-Build-In Modules 32.00mm O N 28.5mm 36.7mm 4.25mm 4.85mm Figure 3- Dimensions Full-Build-In Modules Top View (-2) 2004 by MPL AG 6 MEH-008-00 Rev. A

3.2 Top view Dimensions Half-Build-In and External Modules O N 28.5mm 36.7mm 4.85mm 32.00mm 0.9mm 4.25mm 3.3 Height Dimension of - Figure 3-2 Dimensions Half-Build-In and External Modules Top View (-4) 6.35mm 2.00mm. 5.00mm..60mm. 3.90mm. Figure 3-3 Height Dimension of a - Module 2004 by MPL AG 7 MEH-008-00 Rev. A

3.4 Height Dimension of -2 3.5 Height Dimension of -3 Figure 3-4 Height Dimension of a -2 Module 2.00mm. 5.00mm. 2.5mm 6.35mm 3.90mm. 5.00mm..60mm 6.35mm 3.90mm. 9.00mm.60mm. 3.6 Height Dimension of -4 Figure 3-5 Height Dimension of a -3 Module 3.90mm..60mm 6.35mm 9.00mm 5.00mm. 2mm Figure 3-6 Height Dimension of a -4 Module 2004 by MPL AG 8 MEH-008-00 Rev. A

3.7 Height Dimension of -5 3.8 Height Dimension of -6 Figure 3-7 Height Dimension of a -5 Module.60mm 5.2mm 2.50mm 9.00mm 2.00mm..60mm. 2.5mm 5.2mm Figure 3-8 Height Dimension of a -6 Module 2004 by MPL AG 9 MEH-008-00 Rev. A

4. Parts Location 4. Top View The Figure below shows all comonents on Top Side. Please note that depending on the variants only some of the components are populated. J 9Pin D-Sub 0 9 O N 2 J4 0Pin 2mm Header 4.2 Bottom View S RS485/422 Termination Figure 4- Part Location Top View The Figure below shows all comonents on Bottom Side. Please note that depending on the variants only some of the components are populated. J3 0pin 2mm female header 9 0 (c) 2004 by MPL AG MEL-05-00 (A) 2 2 2 J2 2pin 2mm female header Figure 4-2 Part Location Bottom View 2004 by MPL AG 0 MEH-008-00 Rev. A

4.3 Switch Settings 4.3. S: RS485/422 Termination This Switch is populated only on the RS485/422 Modules (-2, -4, -6) Switch On Off S S RxD+ and RXD- are terminated (20Ohm) RxD+ and RXD- are not terminated O N Table 4- S RS485/422 Termination Switch 4.4 Connectors 4.4. J 9Pin D-Sub RS232/RS485/422 Signal Connector This Connector is only populated on the Half-Build-In and External modules (-3, -4, -5 and -6) No RS232 (-3/-5) RS485/422 (-3/-6) Signal Description Signal Description Pinout DB9 male DCD Carrier detect 2 RXD Receive data RX+ Receive data + 3 TXD Transmit data TX+ Transmit data + 4 DTR Data terminal ready 5 GND Ground GND RS485 Ground 5 6 DSR Data set ready 6 9 DSUB-9 7 RTS Request to send RX- Receive data - 8 CTS Clear to send TX- Transmit data - 9 RI0 Ring indicator Table 4-2 J 9Pin D-Sub RS232/RS485/422 Signal Connector 4.4.2 J2 2Pin 2mm female header RS232/RS485/422 Signal Connector This Connector is only populated on the Full-Build-In modules (-, -2) No RS232 (-) RS485/422 (-2) Signal Description Signal Description Pinout 2Pin 2mm female header EARTH Earth EARTH Earth 2 EARTH Earth EARTH Earth 3 GND Ground GND RS485 Ground 4 GND RS485 Ground GND RS485 Ground 2 5 RI Ring indicator 6 DTR Data terminal ready 7 CTS Clear to send TX- Transmit data - 8 TXD Transmit data TX+ Transmit data + 9 RTS Request to send RX- Receive data - 0 RXD Receive data RX+ Receive data + DSR Data set ready 2 2 DCD Carrier detect Table 4-3 J2: 2Pin 2mm female header RS232/RS485/422 Signal Connector 2004 by MPL AG MEH-008-00 Rev. A

4.4.3 J3 0Pin 2mm female header TTL-in Connector This Connector is only populated on the Full-Build-In and Half-Build-In modules (-, -2, -3 and -4) No -, -2, -3-4 Pinout 0Pin 2mm female Signal Description header DCD# Carrier detect 2 DSR# Data set ready 3 RXD Receive data 4 RTS# Request to send 9 0 5 TXD Transmit data 6 CTS# Clear to send 7 DTR# Data terminal ready 8 RI# Ring indicator 9 GND Ground 0 VCC +5V Power 2 Table 4-4 J3 0Pin 2mm female header TTL-in Connector 4.4.4 J4 0Pin 2mm male header TTL-in Connector This Connector is only populated on the External modules (-5, -6) No -5, -6 Signal Description Pinout 0Pin 2mm male header DCD# Carrier detect 2 DSR# Data set ready 3 RXD Receive data 0 9 4 RTS# Request to send 5 TXD Transmit data 6 CTS# Clear to send 7 DTR# Data terminal ready 8 RI# Ring indicator 9 GND Ground 2 0 VCC +5V Power Table 4-5 J4 0Pin 2mm male header TTL-in Connector 2004 by MPL AG 2 MEH-008-00 Rev. A

5. Operation 5. RS232 The RS232 operation is straight forward. All TTL Inputs Signals are converted to RSR232 Output Signals and all RS232 Input Signals are converted to TTL Signals. The Table below shows the convering directions of the Signals: Signals Description TTL RS232 Direction Direction TXD Transmit data In Out RXD Receive data Out In RTS# Request to send In Out CTS# Clear to send Out In DTR# Data terminal ready In Out DSR# Data set ready Out In DCD# Carrier detect Out In RI# Ring indicator Out In Table 5- RS232 Signal List 2004 by MPL AG 3 MEH-008-00 Rev. A

High-Tech Made in Switzerland 5.2 RS485/RS422 5.2. Differences between RS485 and RS422 The major difference betweeen RS485 and RS422 is the bus topology. RS422 allows multi-drop (one transmitter, up to 0 receiver on one two wire connection) operation, whereas RS485 allows multi-point (up to 32 transmitter/receiver on one two wire connection). Driver Receiver Termination Termination Up to 32 Driver/Receiver Figure 5- Typical RS485 multi-point Application Driver Termination Receiver Up to 0 Receiver Figure 5-2 Typical RS422 multi-drop Application Since the electrical Specification of the RS485 Driver/Receiver is backward compatible with the electrical Specification of the RS422 Driver/Receiver, the RS485/422 modules can be used for either Interface. Due to the topology, RS422 is often used/refered as RS422 full-duplex Interface and RS485 is refered as RS485 halfduplex Interface. Driver Receiver Termination Figure 5-3 RS485 Half Duplex Connection Driver Termination Receiver Receiver Termination Driver Figure 5-4 RS422 Full-Duplex Connection 2004 by MPL AG 4 MEH-008-00 Rev. A

High-Tech Made in Switzerland 5.2.2 Block Diagram VCC 5V DC/DC Converter VCC 5V RS485 VCC GND RS485 GND RS485 Ground S: Termination enable RxD Receiver Termination RS485 Receive + RxD RS485 Receive - RS485 GND Driver TxD TxD RS485 Transmit + RS485 Transmit - RTS# Driver Enable TTL In: J3 on -2/-3 J4 on -6 RS485/422: J2 on -2 J on -4/-6 Figure 5-5 RS485/422 Schematic 5.2.3 RS422 Configuration To use the modules as RS422 Interfaces, connect the 4 wires (Rx+, Rx-, Tx+ and Tx-) to the connector and make sure that your Software Driver asserts the RTS# (Ready To Send) Signal. Set the DIP switch S according your bus topology (The last Receiver on the bus must be terminated). 5.2.4 RS485 Configuration To use the modules as RS485 Interfaces, connect the Receive+ (Rx+) to the Transmit+ (Tx+) and the Receive- (Rx-) to the Transmit- (Tx-). Then connect the 2 wires to your bus. Make sure, that your Software Driver asserts the RTS# (Ready To Send) Signal only during transmitting data to the bus. Set the DIP switch S according your bus topology (The last Driver/Receiver on the bus must be terminated). 2004 by MPL AG 5 MEH-008-00 Rev. A

6. Electrical Specification 6. RS232 Modules (-/-3/-5) 6.. TTL Signals Parameter Symbol Min Max Input Low Voltage V IL 0.8V Input High Voltage V IH 2.0V Output Low Voltage @.6mA V OL 0.4V Output High Voltage @-ma V OH 3.5V Table 6- TTL Signals RS232 Modules 6..2 RS232 Signals Parameter Min Typ Max Input Voltage Range -30V +30V Input Threshold Low 0.8V.2V Input Threshold High.7V 2.4V Output Voltage Swing +/-5V +/-9V Table 6-2 RS232 Signals RS232 Modules 6..3 AC Characteristic and ESD Protection Parameter Conditions Symbol Min Typ Max Maximum Data Transfer Rate RL = 3kΩ.. 7kΩ, CL = 50pF.. 000pF 20 kbps Receiver Propagation Delay CL = 50pF t PLHR, t PHLR 0.5 µs 0 µs Transmitter Propagation Delay RL = 3kΩ.. 7kΩ, CL = 50pF.. 000pF t PLHT, t PHLT 2 µs Human Body Model +/-5kV ESD-Protection Voltage IEC000-4-2, Contact Discharge +/-8kV IEC000-4-2, Air-Gap Discharge +/-5kV Table 6-3 AC Characteristic and ESD Protection RS232 Modules 6.2 RS485/422 Modules (-2/-4/-6) 6.2. TTL Signals Parameter Symbol Min Typ Max Input Low Voltage V IL 0.8V Input High Voltage V IH 2.0V Output Low Voltage @4mA V OL 0.4V 0.8V Output High Voltage @-4mA V OH 3.7V Table 6-4 TTL Signals RS485 Modules 6.2.2 RS485 Signals Parameter Conditions Min Typ Max no Load 5V Driver differential Output RL=50Ω (RS422) 2.0V RL=27Ω (RS485).5V 2.0V 5V Receiver Input Threshold -7V<V CM<2V -200mV -90mV -0mV Receiver Input Hysteresis -7V<V CM<2V 5mV 30mV 70mV Table 6-5 RS485 Signals RS485/422 Modules 2004 by MPL AG 6 MEH-008-00 Rev. A

6.2.3 AC Characteristic and Isolation Voltage Parameter Conditions Symbol Min Typ Max Maximum Data Transfer Rate 250 kbps 40 kbps Receiver Propagation Delay t PLH, t PHL 600ns 855ns Driver Propagation Delay t PLH, t PHL 600ns 855ns Driver Enable to Output t ZH, t ZL 000ns 400ns Driver Disable to Output t LZ, t HZ 700ns 300ns Isolation Voltage Minute 500V RMS Table 6-6 AC Characteristic and Isolation Voltage RS485/422 Modules 2004 by MPL AG 7 MEH-008-00 Rev. A

7. Support information MPL AG In case of questions contact MPL AG or your local distributor. MPL AG homepage: www.mpl.ch Email address: support@mpl.ch 2004 by MPL AG 8 MEH-008-00 Rev. A

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Copyright and revision history Copyright 2004 by MPL AG Elektronik Unternehmen. All rights reserved. Reproduction of this document in part or whole, by any means is prohibited, without written permission from MPL AG Elektronik Unternehmen. This manual reflects Revision A of the -Modules. Disclaimer The information contained herein is believed to be accurate as of the date of this publication, however, MPL AG will not be liable for any damages, including indirect or consequential, arising out of the application or use of any product, circuit or software described herein. MPL AG reserves the right to make changes to any product herein to improve reliability, function or design. Trademarks Brand or product names are trademarks and registered trademarks of their respective holders. Our local distributor: 2004 by MPL AG 20 MEH-008-00 Rev. A