Connecting; Rs232 Interface Of The Communications Module - Siemens SIMATIC S7-1500/ET 200MP CM PtP RS232 HF Manual

Connecting

3.1

RS232 interface of the communications module

Terminal assignment
The table below shows the terminal assignment for the 9-pin sub D male connector in the
front panel of the communications module.
Table 3- 1 Terminal assignment for the sub D male connector of the integrated interface of the communications module
Male connector of the
communications module
* View from the front
Connecting cables
Standard connecting cables of various lengths (see chapter Accessories (Page 11)) are
available for connection with a communication partner which also has a 9-pin sub-D male
connector.
Please note that you must only use shielded connector casings and cables. A large surface
area of the cable shield must be in contact with the connector casing on both sides.
NOTICE
Never connect the cable shield with the GND, as this could destroy the interfaces. GND
must always be connected on both sides (pin 5), otherwise the modules could be
destroyed.
CM PtP RS232 HF (6ES7541‑1AD00‑0AB0) communication module
Manual, 01/2013, A5E03790665-01
Pin Designation
1 DCD Data Carrier Detect
2 RXD Receive Data
3 TXD Transmit Data
4 DTR Data Terminal Ready
5 GND Ground
6 DSR Data Set Ready
7 RTS Request To Send
8 CTS Clear To Send
9 RI Ring Indicator
Input/output Meaning
Input Received signal level
Input Receive data
Output Transmit data
Output Data terminal ready
- Functional ground
(isolated)
Input Data set ready
Output Request to send
Input Clear to send
Input Incoming call
3
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