Siemens SINAMICS S120 Equipment Manual page 59

Power supply for digital inputs/outputs X424
Table 3-6 Terminal block X424
Terminal
+
+
M (GND)
M (GND)
Max. connectable cross-section: 2.5 mm
Type: Screw terminal 2 (see Appendix A)
Note
The two "+" and "M" terminals are jumpered in the connector and not in the unit. This
ensures the supply voltage is looped through.
This power supply is required for the digital inputs/outputs only. The electronics power
supply and the power supply for the analog inputs/outputs are drawn via the option slot of
the control unit.
Note
The power supply of the digital inputs/outputs and the electronics power supply of the control
unit are isolated.
Note
If a momentary interruption in the voltage occurs in the 24 V supply, the digital outputs will
be deactivated until the interruption has been rectified.
Equipment Manual for Control Units and Additional System Components
Equipment Manual, (GH1), 04.2004 Edition, 6SL3097-2AH00-0BP0
Function
Power supply
Reserved, do not use
Ground
Ground
2
Additional System Components
3.2 Option Board: Terminal Board 30 (TB30)
Technical specifications
Voltage: 24 V DC (20.4 V – 28.8 V)
Current consumption: Max. 4 A (per digital output max.
0.5 A)
Max. current via jumper in connector:
20 A at 55 °C
3-9