Rockwell Automation 1732DS-IB8 User Manual page 28

24 Understand the Operation of Safety Functions
Publication 1791DS-UM001H-EN-P - April 2009
Dual-channels, Equivalent
The status is treated as normal (OK) when both channels are on or
off. If one channel is on and the other channel is off, it is treated as a
fault (alarm). In the fault (alarm) state, the safety input data and
individual safety input status turn off for both inputs.
Normal Operation and Fault Detection
Normal Operation
IN0
IN1
Safety Input 0
Remote
Safety Input 1
I/O
Data
Safety Input
Status 0, 1
Fault Detection
IN0
IN1
Safety Input 0
Remote
Safety Input 1
I/O
Data
Safety Input
Status 0, 1
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
Discrepancy Time
Discrepancy Time
Fault Detected
44092