Interface module
7.5 Interface module SB71
SIMATIC TDC hardware
204 System Manual, 08/2017, A5E01114865-AL
Interface module SB71
Article number
6DD1681-0DH1
Interface module SB71 is used to adapt eight digital DC signals from SIMATIC TDC to the
signal level on plant side in an electrically isolated circuit.
Cable SC62 is used to connect the interface module to the SIMATIC TDC components (for
further information, refer to the documentation for the SIMATIC TDC components).
● The enclosure is suitable for snap-on mounting to rails
● Ribbon cable connector (X1):
– 8 pins for digital inputs
– 2 pins for 1P, 1M
● Connector (X2), 2x 8-pole
– 8 terminals for digital outputs, 24/48 V DC
– 8 terminals for reference potentials
● 1 terminal pair X3: 1P and 1M (voltage supply on SIMATIC TDC side)
● 1 terminal pair X4: 2P, 2M (voltage supply on plant side)
● Double test socket X5: 1P(+), 1M(G)
● LED displays for diagnostics
● Optocoupler for electrical isolation between inputs and outputs
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.
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