Setup
Connections
EPOS4 50/5 Hardware Reference
3-46
CCMC | 2022-04 | rel10445
Table 3-48
STO input specification
Figure 3-36
STO-IN1 circuit (analogously valid for STO-IN2)
Table 3-49
STO output specification
Figure 3-37
STO-OUT circuit
Continued on next page.
Safe Torque Off inputs 1…2
Circuit type
Optically isolated input
Input voltage
0…+30 VDC
Max. input voltage
±30 VDC
Logic 0
<1.0 VDC
Logic 1
>4.5 VDC
Input current at logic 1
>2 mA @ 5 VDC
typically 3.2 mA @ 24 VDC
Reaction time
<25 ms
Safe Torque Off output
Circuit type
Optically isolated output with self-resetting short-
circuit protection
Max. input voltage
±30 VDC
Max. load current
15 mA
Leakage current
<10
μ
A @ +30 VDC
Max. voltage drop
1.3 V @ 2 mA
2.5 V @ 15 mA
