Allen-Bradley 1756 Series

62 Rockwell Automation Publication 1756-UM013B-EN-P - October 2019
Chapter 4 1756-OBV8S Output Module Features
Dual-channel Point
Operation Type
When dual-channel Point Operation Type is used, output channels function as
connection pairs. Connection pairs are as follows:
•Channels 0 and 1
•Channels 2 and 3
•Channels 4 and 5
•Channels 6 and 7
When both output channels in a connection pair are in the On state and without
any faults, the safety outputs are turned on.
For information on how to use dual-channel Point Operation Type with a
1756-OBV8S module affects the safety application suitability level, see Table 13
on page 59.
Figure 15 - 1756-OBV8S Dual-channel Point Operation Type (Not to Scale)
IMPORTANT Dual-channel Point Operation Type is only available if the module is
connected so that Output Mode is Sourcing.
Normal Operation
Fault Detection
ON
OFF
ON
OFF
ON
OFF
Safety Outputs 0
and 1 Status
Output 0
Safety Network Data
Sent to the Controller
Safety Outputs 0
and 1 Status
Output 1
Safety Network Data
Sent to the Controller
Error Detected
ON
OFF
ON
OFF
ON
OFF
Output 0
Output 1