Connecting
6.9 Assignment of terminals and connectors
SINAMICS DCM DC Converter
182
Operating Instructions, 12/2018, A5E34763375A
Table 6- 38 Terminal X179
Terminal
X179
Function
Technical specifications
1
Supply (output)
4.4 to 5.4 V DC short-circuit proof, maximum load 300 mA
Internal supply related to internal ground terminal
2
Ground, digital M
3
TXD1
Send cable, RS232 standard (V.24)
4
RXD1
Receive cable, RS232 standard (V.24)
5
TXD2
Send cable, RS232 standard (V.24)
6
RXD2
Receive cable, RS232 standard (V.24)
"Control Unit (CUD)" module
Note
Only one of the two interfaces – RS485 (X178-3, 4) or RS232 (X179-3, 4) – may be used.
PROFIBUS connection
Table 6- 39 PROFIBUS connector assignment
Connector
X126
Pin
Signal name
Technical specifications
1
-
Not assigned
2
-
Not assigned
3
RxD/TxD-P
RS485 receive/transmit data P (B)
4
CNTR-P
Control signal (TTL)
5
DGND
PROFIBUS data ground
6
VP
Positive supply voltage (5 V +/-10%)
7
-
Not assigned
8
RxD/TxD-N
RS485 receive/transmit data N (A)
9
-
Not assigned
"Control Unit (CUD)" module
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