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Rockwell Automation Publication 1791ES-UM001G-EN-P - November 2016
Chapter 1
Safety Function Operation
Dual-channel
When the data of both channels is in the on state, and neither channel has a
fault, the outputs are turned on. The status is normal. If a fault is detected on
one channel, the safety output data and individual safety output status turn off
for both channels.
Figure 12 - Dual-channel (not to scale)
ON
OFF
OUT0
Safety Output
Status 0, 1
OUT0
OUT1
OUT1
Safety Output
Status 0, 1
Fault Detection
Error
Detected
Remote
I/O
Data
Remote
I/O
Data
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
Normal Operation
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