Short Circuit Detection

Short Circuit Detection helps prevent damage to the output that can result when more current is present at the output than it can handle.

A short circuit condition can cause an increase in temperature and trigger a thermal shutoff to prevent damage to the output.

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.Outputxx.Fault
tag is set to 1.

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 follows the commanded state (off or steady yellow).
If there are no other faults present, the
I.Outputxx.Fault
tag is reset to 0.

For more information on the maximum current that you can apply to an output, see the PointMax I/O System Specifications Technical Data, publication 5034-TD001.