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Communication modules
6.2 CP50M0 communication module
6.2.7
Pin assignments
PROFIBUS DP/MPI interface X1 and X2
The following connections are assigned to the 9-pin sub-D receptacle:
● PROFIBUS interface, RS 485 format and electrical isolation
● Parameterizing and diagnostics interface with RS 232 format for downloading the bus
configuration
● 5 V power supply for Optical Link Modules (OLM) with electrical isolation
Table 6- 9
Pin
Cable for RS 232 interface on X1 and X2
You can assemble a custom cable for the "SS52load" load program based on the following
pin assignment.
Table 6- 10
Pin
2
7
1
104
Pin assignment for X1 and X2 (for RS 232 or RS 485)
Designation
1
RS 232: Ground
2
RS 232: TxD
3
RS 485: +Tx/Rx
4
RTS
5
M5EXT
6
P5EXT
7
RS 232: RxD
8
RS 485: -Tx/Rx
9
RTS
Pin assignment of the cable (PC ↔ CP50M0) for the "SS52load" load program
CP50M0 (X1 or X2)
Designation
TxD
RxD
Ground
Explanation
For "SS52load": Ground
For "SS52load": Send signal
PROFIBUS: Receive and transmit signal +(corresponds to Data B)
Request to Send (for OLM control: "1" for transmission, as pin 9)
External ground; for the supply to OLMs
P5 external; for the supply to OLMs
For "SS52load": Receive signal
PROFIBUS: Receive and transmit signal +(corresponds to Data A)
Request to Send (for OLM control: "1" for transmission, as pin 4)
PC (9-pole connector)
Pin
Designation
2
RxD
3
TxD
5
Ground
PC (25-pole connector)
Pin
Designation
3
RxD
2
TxD
7
Ground
SIMATIC TDC hardware
System Manual, 12/2013, A5E01114865-07
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