Additional system components 
9.1 Terminal Module TM54F 
SINAMICS S120 Combi 
Manual, (GH9), 07/2016, 6SL3097-4AV00-0BP5 
211 
 
X525 fail-safe digital output 
Table 9- 9  Terminal block X525 
1  DI 21 
F-DO 1 
Voltage: -3 … +30 V DC 
Current consumption, typical: 3.2 mA at 24 V 
Electrical isolation: Reference potential is terminal M1 
The digital input is electrically isolated. 
Level (incl. ripple) 
High level: 15 … 30 V 
Low level: -3 … +5 V 
Input delay:
2)
 
for "0" → "1": 30 μs (100 Hz) 
for "1" to "0": 60 μs (100 Hz) 
0.5 A 
Reference potential is terminal M1 
0.5 A 
Reference potential is terminal L1+, L2+ or L3+ 
Output delay:
2)
 
- for "0" → "1": 300 μs 
for "1" → "0": 350 µs 
Total current consumption of all DOs: 2 A 
Max. leakage current: < 0.5 mA 
Switching frequency: 
 for ohmic load: Max. 100 Hz 
 for inductive load: Max. 0.5 Hz 
 for lamp load: Max. 10 Hz 
3  DO 1- 
An F-DO comprises 2 digital outputs and 1 digital input for feedback signal 
F-DO 1 = terminals 1, 2, and 3 
Type: Screw terminal 1 (Page 307) 
Max. connectable cross-section: 1.5 mm² 
Tightening torque: 0.22 … 0.25 Nm 
DI: digital input; DO: digital output F-DO: Fail-safe digital output