Data Sheet

M5S communication modules - „CX“
• These modules can be used to address different
communication interfaces.
• The communication modules use 2 signal pins per
module as opposed to the I/O modules, each using
1 signal pin.
• TX/RX wiring on the control side
• Optional: isolated or non-isolated signal
• RS232, RS422, RS485, USB, LAN, CAN
• Not usable with the evaluation boards for Arduino
and Raspberry Pi
M5S-CX.232.03.E3, M5S-CX.232.05.E3
Description Internal circuit External circuit
Version Signal Supply Isolation Signal Supply
RS232
communication module
non-isolated
CX.232.03 0-3.3 V TTL 3.3 V/5 mA DC No ± 9 V
RS232 interface
Via internal supply
CX.232.05 0-5 V TTL 5 V/5 mA DC
EXT-RX
INT+ INT-TX
EXT−
INT−
U
U
INT
5 V
MCU
M5S-CX23205E3
1
2 3 4
5
6
7
8
INT-RX
EXT-TX
RS232-TX
RS232-RX
GND
+ −
M5S-CX.422.03.E3, M5S-CX.422.05.E3
Description Internal circuit External circuit
Version Signal Supply Isolation Signal Supply
RS422
communication module
non-isolated
CX.422.03 0-3.3 V TTL 3.3 V/5 mA DC No 5 V
differential voltage
RS422 interface
Via internal
supply
CX.422.05 0-5 V TTL 5 V/5 mA DC
EXT-TX−
INT+ INT-TX
EXT-RX+
INT−
U
U
INT
3.3 V
MCU
M5S-CX42203E3
1
2 3 4
5
6
7
8
INT-RX
EXT-TX+
RS422-TX+
RS422-TX−
RS422-RX+
RS422-RX−
GND
EXT-RX−
+ −
Rev-2019-08 Page 16 of 20 www.tde-instruments.de