Siemens SINAMICS DCM Manual page 180

Table 6- 38 Terminal X179
Terminal Function
X179
1 Supply (output)
2 Ground, digital M
3 TXD1
4 RXD1
5 TXD2
6 RXD2
"Control Unit (CUD)" module
Note
Only one of the two interfaces - RS485 (X178-3, 4) or RS232 (X179-3, 4) - may be used.
SINAMICS DCM DC Converter
Operating Instructions, 02.2015, A5E34763375/RS-AA/001
Technical specifications
4.4 to 5.4 VDC short-circuit proof, maximum load 300 mA
Internal supply related to internal ground terminal
Send cable, RS232 standard (V.24)
Receive cable, RS232 standard (V.24)
Send cable, RS232 standard (V.24)
Receive cable, RS232 standard (V.24)
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6.9 Assignment of terminals and connectors
Connecting
181