
The serial interface COM2 is connected to a 9-pin D-sub connector. It is configurable for
RS-232 and RS-485 and can be used (depending on the processor module) for:
● Online access (RS-232 programming interface for Automation Builder)
● A free protocol
● Modbus RTU, client and server
COM2 is not intended to establish a CS31 system bus.
TB5x3-2ETH terminal bases have no COM2 D-sub connector.
Serial
Interface
Pin
Signal
Interface
Description
1
FE
-
Functional earth
2
TxD
RS-232
Transmit data
Output
3
RxD/TxD-P
RS-485
Receive/Transmit
Positive
4
RTS
RS-232
Request to send
Output
5
SGND
Signal ground
0 V supply out
6
+5 V
-
5 V supply out
7
RxD
RS-232
Receive data
Input
8
RxD/TxD-N
RS-485
Receive/Transmit
Negative
9
CTS
RS-232
Clear to send
Input
Shield
FE
-
Functional earth
NOTICE!
Risk of corrosion!
Unused connectors and slots may corrode if XC devices are used in salt-mist
environments.
Protect unused connectors and slots with TA535 protective caps for XC devices
Chapter 1.8.4.6 “TA535 - Protective Caps for XC Devices”
.
1.1.1.2.4 ARCNET Network Interface
ARCNET connection of the processor modules PM5xx-ARC.
1.1.1.2.5 Ethernet Networking Interfaces
This interface is used for the connection of processor modules with onboard Ethernet e.g.
PM5xx-ETH.
Serial Interface
COM2
Pin assignment
Device Specifications
Terminal Bases (AC500 Standard) > TB51x-TB54x
2019/04/17
3ADR010121, 13, en_US
9