Connecting; Rs232 And Rs422/485 Interface Of The Communication Module - Siemens SIMATIC ET 200SP Manual

Connecting

3.1

RS232 and RS422/485 interface of the communication module

Pin assignment
Table 3- 1 RS232 connection
Terminal assignment of the
communication module
BaseUnit
Front view
CM PtP communication module (6ES7137-6AA00-0BA0)
Manual, 01/2013, A5E03790792-01
Pin Designation
1 TXD Transmit Data
2 RXD Receive Data
3 RTS Request To Send
4 CTS Clear To Send
5 DTR Data Terminal Ready
6 DSR Data Set Ready
7 DCD Data Carrier Detect
8 RI Ring Indicator
GND Ground
9+10
Input/output Meaning
Output Transmit data
Input Receive data
Output Request to send
Input Clear to send
Output Data terminal ready
Input Data set ready
Input Received signal level
Input Incoming call
- GND functional ground
(isolated)
3
17