Siemens SINAMICS S120 Manual page 381

NOTICE
Interfaces -X1, -X2, -X3 and -X4 are wired in the cabinet and are not available for customer
connections!
If the customer terminal block is ever replaced, connectors -X1 and -X2 must not be mixed
up! Otherwise, "Safe Torque Off" and "Safe Stop 1" will malfunction!
Note
The customer terminal block is a standard component of the Motor Module (chassis format)
Cabinet Module. The digital inputs/outputs of the CU320-2 Control Unit on terminal blocks -
X55-X122 and -X55-X132 can only be used with the K90 option (CU320-2 Control Unit
PROFIBUS).
Note
The two groups of digital inputs (DI0 to DI3, DI16 and DI17 or DI4 ... DI7, DI20 and DI21)
each have a common reference potential per group (ground reference M1 or M2). To close
the circuit when the internal 24 V supply is used, the ground references M1 / M2 are
connected to internal ground (M).
If power is supplied from an external source, the jumper between ground M1 and M or M2
and M must be removed in order to avoid potential looping. The external ground must then
be connected to terminals M1 or M2.
Cabinet Modules
Manual, (GH5), 05/2010, A5E03263538A
8.15 K90, Control Unit CU320-2 PROFIBUS
Options
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