Controlling the safety functions   
5.3 Control of "STO" and "SS1" via terminals on the Control Unit and the Motor/Power Module 
  Safety Integrated 
86  Function Manual, 08/2023, A5E03264275A 
Terminal strip -X132 on the CU320-2 Control Unit 
Table 5- 25  Terminal strip -X132 on the CU320-2 Control Unit 
1)
 
Electrical isolation: Yes  
Reference potential: M2 
Input characteristic acc. to IEC 61131-2, type 1 
Input voltage (including ripple) 
 "1" signal: 15 … 30 V 
 "0" signal: -3 … +5 V 
Input current  
 at 24 V DC: typ. 3.5 mA  
 at <0.5 mA: Signal "0" reliably detected 
Input delay 
 for "0" → "1": typ. 50 μs 
 for "1" → "0": typ. 150 µs 
Reference potential for terminals 1 … 6 
Voltage: -3 … +30 V DC 
Electrical isolation: no 
Reference potential: M 
Input characteristic acc. to IEC 61131-2, type 1 
Input voltage (including ripple) 
 "1" signal: 15 … 30 V 
 "0" signal: -3 … +5 V 
Input current  
 at 24 V DC: typ. 3.5 mA  
 at <0.5 mA: Signal "0" reliably detected
 
Input delay 
 for "0" → "1": typ. 5 μs 
 for "1" → "0": typ. 50 μs 
 DI 12, DI 13, DI 14 and DI 15 are "fast inputs"
2)
 
As output: 
Voltage: 24 V DC 
Electrical isolation: no 
Reference potential: M 
Output voltage 
 "1" signal, with load: > X124.+ -2 V 
Output current  
 for each output: ≤ 0.5 A 
 Sum of all four outputs: ≤ 2 A 
 Residual current for "0" signal: < 0.5 mA 
 Short-circuit protection, automatic restart after a short-circuit 
Load types: ohmic, capacitive, inductive 
Output delay
3)
 
 for "0" → "1": typ. 150 μs / max. 400 μs (ohmic load) 
 for "1" → "0": typ. 75 µs / max. 100 µs (ohmic load) 
Switching frequency 
 for ohmic load: max. 100 Hz 
 for inductive load: max. 0.5 Hz 
 for lamp load: max. 10 Hz