Aerotech Automation1 iXR3, Hardware Manual

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Table 2-50: STO Electrical Specifications
Status Value
STO off (motion allowed) 18-24 V, 7 ma
STO on (safe state entered, no motion) 0-6 V
Recommended Wire Gauge
22-26 AWG (0.5 - 0.14 mm
2
)
STO System Power Supply PELV
STO Wire Length (maximum) 50 m
Figure 2-47 shows one safety device connected to multiple controllers in parallel.
WARNING : The controller does not check for short circuits on the external STO wiring.
If this is not done by the external safety device, short circuits on the wiring must be
excluded. Refer to EN ISO 13849-2. For Category 4 systems, the exclusion of short
circuits is mandatory.
Figure 2-47: Typical STO Configuration
2.10. Safe Torque Off Input (STO) iXR3/XR3 Hardware Manual
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