Allen-Bradley 1756-L6 Series, Reference Manual, Page: 45 / 134

Rockwell Automation Publication 1756-RM001I-EN-P - May 2012 45
ControlLogix I/O Modules Chapter 5
Figure 16 - ControlLogix Diagnostic Output Module Wiring
Figure 17 - Diagnostic Output Logic
Wiring Standard Digital Output Modules
When using standard (non-diagnostic) output modules, you must wire each
output to its field device and also to a system input to monitor the output’s
performance. To verify output performance, use one of these methods:
• Write logic to test the output’s ability to turn ON and OFF at powerup.
• At the proof test interval, force the output ON and OFF and use a
voltmeter to verify output performance.
43365
V-/L2
V+/L1
Output
V+/L2
This normally-open contact (held closed) must represent
the healthy operation of the controller and safety I/O
modules. Safety I/O status can be restricted to inputs
directly affecting outputs on the specific module, or this
contact can represent the healthy status of all safety
inputs and the controller. The module used to control
this relay must follow SIL 2 output guidelines. This
module must also be considered during PFD analysis for
each safety function. We recommend the use of a
recognized safety relay or contactor.
Actuator
Secondary
Output
Alarm to
Operator
Fault
Application Logic
Actuator
Output Fault
Data Echo
Data Echo
Timer
Actuator
Actuator
Output Fault contact must represent module and channel diagnostics.
Secondary
Output
Fault
Allen-Bradley Motors