DC link components 
7.1 Control Supply Module CSM 
166 
SINAMICS S120 Combi 
Manual, (GH9), 07/2016, 6SL3097-4AV00-0BP5 
 
Table 7- 2  X21 signaling contact 
Voltage: 24 V DC 
Max. load current: 0.5 A (ohmic load) 
Type: Screw terminal 2 (Page 307) 
Max. connectable cross-section 1.5 mm
2
 
Tightening torque: 0.22 … 0.25 Nm 
2 
The 2-pole terminal connector for the signaling contact is included in the Completion Kit provided. 
The signaling contact can be wired to a digital input (DI) of the Control Unit to indicate the 
failure of a Control Supply Module. 
The signaling contact operates as an isolated NO contact. When the switch is closed, the 
Control Supply Module is "OK" and provides the output voltage. The switch opens in the 
event of a fault "Not OK" – when the overtemperature condition is still present, after a pre-
warning, wire breakage, short-circuit etc. The Control Supply Module is correspondingly 
switched off. 
Signaling contact without terminal connector 
in the delivery condition 
Signaling contact, complete with t
erminal 
 
X24 24 V terminal adapter 
Table 7- 3  X24 24 V terminal adapter 
Supply voltage 24 ... 28.8 V DC 
Type: Screw terminal 5 (Page 307) 
Max. connectable cross-section: 6 mm
2
 
Tightening torque: 1.5 … 1.8 Nm 
The 24 V terminal adapter is included in the scope of supply.