Interface module
7.5 Interface module SB71
SIMATIC TDC hardware
System Manual, 08/2017, A5E01114865-AL
205
The voltage supply on SIMATIC TDC side is indicated by a green LED (P).
The supply voltage on SIMATIC TDC side (1P, 1M) is short-circuited (fault).
Voltage supply on plant side
The 24/48 V DC power supply voltage for signals on plant side is wired to terminal block X4:
2P
+24/48 V
Connect the cables using accessory kit SM11 "Power supply connector for interface
modules" (article number: 6DD1680-0BB0)
The maximum conductor cross-section at terminal X4 is 2.5 mm².
The SIMATIC TDC supply voltage is available on the double test socket X5 (G; +):
+ (1P of X3)
G (1M of X3)
+24 V
0 V
It is not allowed to use the X5 test sockets in potentially explosive environments.
Note
When wiring the supply voltage, observe the “Installation and EMC Directives” chapter in the
User Manual.
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