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Instructions for Using Incandescent Lamps or LEDs
All North American Operator Panels may be operated with either incandescent lamps or with LEDs. Table
1-8 lists LED conversion kits for Operator Panels that have incandescent lamps.
Note:
•
Jumper JP1 must be in the standard position if lamps are installed, and in the
alternate position if LEDs are installed. (See “JP1 Setting”, below.)
•
Do not mix lamps and LEDs.
•
Each LED should be mounted behind a lens cap of the same color, otherwise the
emitted light may not pass through.
JP1 Setting
All North American Operators Panels have a jumper (JP1) that must be set up differently depending on
whether incandescent lamps are used, or LEDs are used. On the Series i compatible units, JP1 is located on
circuit board OPND1, behind and below the Cycle Start Pushbutton.
•
For use with incandescent lamps, place the jumper JP1inside the silk-screened rectangle marking. This
will result in the jumper being located across the two pins furthest from the nearby corner of the circuit
board OPND1. When the jumper is set this way, the lamp filaments are pre-heated when off, and will
result in longer lamp life.
•
For use with LEDs, place the jumper JP1 in its alternate setting (i.e. not inside the rectangle). This will
result in the jumper being located across the two pins closest to the nearby corner of the circuit board
OPND1.
Verifying Correct Setting of JP1
There are simple tests that can be performed to verify that the jumper JP1 is set correctly.
•
If incandescent lamps are installed, remove the lens cap of a couple of the unlit pushbuttons. A dim
glow will be visible in the filament of each unlit lamp when the jumper JP1 is correctly positioned. If
the ambient light is low, this effect is visible even with the lens caps in place, so this effect can also be
used to check for blown lamps. If none of the "off" lamps is glowing dimly, it is likely that JP1 is in
the wrong position.
•
If LEDs are installed, they will glow dimly if the jumper JP1 is positioned incorrectly. And, as
additional pushbuttons are activated, the LEDs that are supposed to be off will glow a little more
brightly each time. No damage will result to the LEDs, but the operator could become confused. So, if
LEDs that are supposed to be off are in fact glowing, the setting of jumper JP1 should be changed. It is
possible to remove a few lens caps to get a better view of the LEDs underneath while conducting this
test.
WARNING!
The +24VDC power supplied to the Operator Panel is typically NOT removed from the operator
panel by CNC's Control Off logic. Please refer to the electrical schematics provided by the Machine
Tool Builder for specifics.
CAUTION
When removing the incandescent lamps, take care use the extractor tool 44A739089-G01. If the
specified extractor tool is not available, use only a non-metallic/non-conductive device to remove the
incandescent lamps. Damage to circuitry may result when attempting to remove lamps with
conductive tooling such as needle-nose pliers while +24VDC is applied to the operator panel. Even if
no circuit damage results, shorting out the lamp circuit will lead to an I/O error which will disrupt
operation of the machine tool.