Allen-Bradley 1791ES-IB8XOBV4 - Page 16

16 Rockwell Automation Publication 1791ES-UM001G-EN-P - November 2016
Chapter 1 Safety Function Operation
If an error is detected, safety input data and safety input status turns off.
Figure 5 - Single Channel Normal Operation and Fault Detection (not to scale)
24V
0V
T0
Input Terminal 0
External Device
Fault Detected
Remote
I/O
Data
ON
OFF
ON
OFF
ON
OFF
ON
OFF
24V
0V
ON
OFF
T0
Safety Input
Status 0
Fault Detection
Remote
I/O
Data
ON
OFF
ON
OFF
ON
OFF
Safety Input
Status 0
Safety Input 0
Safety Input 0
Input Terminal 0
Normal Operation
External Device