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Chapter 9
Proximity Switch LEDs Test Procedure
A proximity sensor can be checked for proper operation by following these steps.
1. Open the Main Enclosure.
2. Turn the disconnect switch on.
3. Push the “ON” button located on the door to engage main power.
4. The 5 proximity LEDs are labeled “NEEDLE HOME”, “TWISTER HOME”, “H/S
HOME”, “RIBBON DROP” and “RIBBON DISP”.
5. While triggering the proximity switch with a piece of metal, observe the LED on
the Field Termination Board. The LED corresponding to the proximity switch
being triggered should come on when the proximity switch is triggered.
The following procedure may require that tests are made with the
electrical enclosures open and power turned “ON”. These tests
should only be conducted by authorized personnel who are aware
of the electrical and mechanical hazards present.
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