Siemens SINAMICS DCM Manual page 428

10.4 Communication via PROFIBUS DP
10.4.1 PROFIBUS connection
WARNING
Working on the opened device
Only perform all work when the device is current-free.
Please observe the warning notices in Chapter 1.
Position of PROFIBUS connection and diagnostics LEDs
The PROFIBUS connection and diagnostics LEDs are located on the Control Unit (CUD).
The PROFIBUS connection is via a 9-pin Sub-D socket (X126). The connections are
electrically isolated.
See also Figure 6-39 Terminal/connector arrangement on the "Control Unit (CUD)"
(Page 157) and Chapter Description of the LEDs on the CUD (Page 601).
PROFIBUS connection
Table 10- 33 PROFIBUS connector assignment
Connector Pin
X126
1
2
3
4
5
6
7
8
9
"Control Unit (CUD)" module
SINAMICS DCM DC Converter
Operating Instructions, 02.2015, A5E34763375/RS-AA/001
Signal name Technical specifications
- Not assigned
- Not assigned
RxD/TxD-P RS485 receive/transmit data P (B)
CNTR-P Control signal (TTL)
DGND PROFIBUS data ground
VP Positive supply voltage (5 V +/-10%)
- Not assigned
RxD/TxD-N RS485 receive/transmit data N (A)
- Not assigned
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Descriptions of functions
10.4 Communication via PROFIBUS DP
429