Aerotech Automation1 iXL2e, Hardware Manual

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Table 2-25: 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 2-26 shows one safety device connected to multiple drives in parallel.
WARNING : The drive 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 2-26: Typical STO Configuration
2.4. Safe Torque Off Input (STO) iXL2e/XL2e Hardware Manual
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