Relay Output - Vacon optbj Safety Manual

vacon • 26
V - V
STO1+ STO1-
0VDC
24VDC
0VDC
24VDC
5.3.6

Relay output

When the STO function is active, the relay output is closed. When the STO function is inactive the
relay output is open. When STO function has detected a non-resettable diagnostics fault the relay
output toggles at a frequency of one hertz.
NOTE! The ATEX input has no effect on the relay output.
CAUTION! The relay output is intended only for diagnostics of the STO function.
13006.emf
CAUTION! The relay output is a non-safety-related functionality.
13006.emf
5
Table 7. STO function truth table
V - V
STO2+ STO2-
0VDC STO active
STO diagnostic fault and STO activation. Fault is activated after
0VDC
inputs have been in different states for >500 ms.
STO diagnostic fault and STO activation. Fault is activated after
24VDC
inputs have been in different states for >500 ms.
24VDC STO inactive
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STO and SS1 safety functions
STO state