Interface module
7.4 Interface module SB70
SIMATIC TDC hardware
198 System Manual, 08/2017, A5E01114865-AL
Voltage supply on SIMATIC side
The SIMATIC TDC voltage supply is fed to terminal X3:
Voltage on SIMATIC TDC side
1P
+24 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 X3 is 2.5 mm².
supply voltage, observe the “Installation and EMC Directives” chapter in the
Isolation
Safe electrical isolation is guaranteed only between the inputs and outputs
The system side (rack including 24V power supply) is safely isolated from hazardous
voltages on plant side (8 output signals).
The output circuits are only isolated galvanically.
The output circuits on plant side are only isolated galvanically. Circuits consisting of
combinations of safety extra-low voltage and hazardous voltages are not allowed.
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).
The SIMATIC TDC supply voltage is available on the double test socket X5 (G; +):
+ (1P of X3)
+24 V
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