X21 Digital Inputs/Outputs; S1 Threshold Switch - Siemens SINAMICS S120 Equipment Manual

5.1.3.6

X21 digital inputs/outputs

Table 5- 2
Max. connectable cross-section 1.5 mm
1)
Note
Applying a high signal to terminal X21.3 inhibits the Braking Module. On a falling edge,
pending error signals are acknowledged.
Note
You will find setting instructions for wiring the signals in the SINAMICS S120 Function
Manual.
5.1.3.7

S1 Threshold switch

The response threshold at which the Braking Module is activated and the DC link voltage
generated during braking are specified in the following table.
The threshold switch must only be used when the Basic Line, Smart Line, Active Line, or
Motor Module are switched off and the DC link capacitors are discharged.
Chassis power units
Manual, (GH3), 10/2008, 6SL3097-2AE00-0BP3
X21 terminal strip
Terminal Designation
1 Shield
2 0 V
3 DI inhibit input
4 0 V
5 DO fault output
6 +24 V
DI: digital input; DO: Digital output
WARNING
Technical specifications
1)
Shield connection for terminals 2 ... 6
High signal level: +15 V to 30 V
Current consumption: 2 mA to 15 mA
Low signal level: -3 V to 5 V
High signal: No fault
Low signal: Fault present
Voltage: 24 V DC
Load current: 0.5 mA to 0.6 mA
Voltage: +18 V to 30 V
Typical current consumption:
10 mA at 24 V DC
2
DC link components
5.1 Braking Module
187