Rockwell Automation 1791DS-IBxxxx Guard I/O DeviceNet Safety Modules - Manual (Page 29)

Rockwell Automation Publication 1791DS-UM001J-EN-P - May 2013 29
Understand the Operation of Safety Functions Chapter 2
Single Channel Mode
If an error is detected, safety input data and safety input status turn off.
Figure 14 - 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