Allen-Bradley 1756 Series, User Manual, Page: 49 / 136

Rockwell Automation Publication 1756-UM013B-EN-P - October 2019 49
1756-IB16S Input Module Features Chapter 3
Single-channel Point
Operation Type
If an error is detected on the input channel, Safety Input Data and Safety Input
Status turn off.
For information on how using single-channel Point Operation Type with a
1756-IB16S module affects the safety application suitability level, see Table 6 on
page 46 .
Figure 9 - Normal Operation and Fault Detection (Not to Scale)
Normal Operation
Fault Detection
24V DC
0V DC
ON
OFF
ON
OFF
ON
OFF
ON
OFF
Safety Input 0
Data
Safety Input 0
Status
Test Output 0
External Device
Input Terminal 0
Safety Network Data
Sent to the Controller
24V DC
0V DC
ON
OFF
ON
OFF
ON
OFF
ON
OFF
Safety Input 0
Data
Safety Input 0
Status
Test Output 0
External Device
Input Terminal 0
Safety Network Data
Sent to the Controller
Fault Detected
Fault is declared at
the end of the Test
Output pulse.