Allen-Bradley 1756 Series, User Manual, Page: 22 / 136

22 Rockwell Automation Publication 1756-UM013B-EN-P - October 2019
Chapter 1 Digital Safety I/O Module Operation in a Control System
Figure 3 - Example 1756-OBV8S
DC OUTPUT
SAFETY
FLT
ST 0 1 2 3 4 5 6 7
0 1 2 3 4 5 6 7
O
K
DC OUTPUT
SAFETY
FLT
ST 0 1 2 3 4 5 6 7
0 1 2 3 4 5 6 7
O
K
3
5
6
4
2
1
7
Item Description
1 Backplane Connector —Interface for the ControlLogix system that connects the module to the backplane.
2 Top and bottom guides —Guides provide assistance in seating the RTB onto the module.
3 Status indicators —Indicators display the status of communication, module health, and input/output devices.
Indicators help in troubleshooting anomalies.
4 Connector pins —Input/output, power, and grounding connections are made to the module through these pins with
the use of an RTB.
5 Locking tab —The locking tab anchors the RTB on the module, maintaining wiring connections.
6 Slots for keying —Mechanically keys the RTB to help prevent making the wrong wire connections to your module.
7 Module with RTB installed