Allen-Bradley 1732ES-IB12XOB4, User Manual, Page: 25 / 176

Rockwell Automation Publication 1791ES-UM001G-EN-P - November 2016 25
Safety Function Operation Chapter 1
Single-channel
When the data of the channel is in the on state, and the channel does not have a
fault, the output is turned on. The status is normal. If a fault is detected on the
channel, the safety output data and individual safety output status turn off for
the channel.
Figure 13 - Single-channel (not to scale)
Safety Output Fault Recovery
If a fault is detected, the safety outputs are switched off and remain in the off
state.
Follow this procedure to reactivate the safety output data for modules with
bipolar safety outputs (1791ES, 1732ES-IB12XOBV2, and
1732ES-IB12XOBV4 modules).
1. Remove the cause of the error.
2. Place the safety output (or safety outputs) into the safety state.
The safety output status turns on (fault cleared) when the output-error
latch time has elapsed. The I/O indicator (red) turns off. The output
data can now be controlled.
IMPORTANT Safety outputs configured for single-channel operation must be controlled
as pairs for use in functional safety applications.
ON
OFF
OUT0
Safety Output
Status 0
OUT0
Safety Output
Status 0, 1
Fault Detection
Error
Detected
Remote
I/O
Data
Remote
I/O
Data
ON
OFF
ON
OFF
ON
OFF
Normal Operation