64 Rockwell Automation Publication 5094-UM001E-EN-P - April 2020
Chapter 4 Output Module Features
Short-Circuit Protection
Short-Circuit Protection helps prevent damage to the output that can result
when more current is present at the output than it can handle.
For safety output modules (5094-OB16S and 5094-OB16SXT),
I.Ptxx.ShortCircuit tag is used for short to high or channel to channel shorts,
which do not incur over current.
There are ShortCircuitGround and Overload tags in Diagnostic assembly.
In standard modules, when a short-circuit condition is detected, the following
occurs:
• The output turns off.
• The I/O status indicator for the output flashes red.
• The I.Ptxx.ShortCircuit tag is set to 1.
For more information on how to use the modules, see Appendix
B,
Module Tag Definitions
on page 143.
In standard modules, when the short-circuit condition is removed, the following
occurs:
• The output restarts in its commanded state.
• The I/O status indicator for the output turns off.
• The I.Ptxx.ShortCircuit tag is reset to 0.
For safety modules, refer to the Safety Output Fault Reset
procedure on page 83.
For more information on the maximum current that you can apply
to an output, see the FLEX 5000 Modules Specifications Technical Data,
publication 5094-TD001
.
IMPORTANT These FLEX 5000 output modules are the only ones to support the Short-
Circuit Detection feature:
• 5094-OB8, 5094-OB8XT
• 5094-OB16, 5094-OB16XT
• 5094-OB16S, 5094-OB16SXT
• 5094-OB32, 5094-OB32XT
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