A feature of the control PCB is that it offers redundancy to a single remote on-off switch.
Before you begin:
■
A 24 VDC (500 mA) and return (GND) from the CNC or controlling device to the expansion PCB are
necessary for redundant remote on-off.
■
Use a separate discrete cable between the redundant remote on-off input and the main control PCB.
1. Move the jumper from pin 1 and pin 2 of the J27 connector to pin 2 and pin 3.
2. Supply 24 V power from the CNC or controlling device to J4 pin 3 of the expansion PCB.
3. Install a return (GND) from the CNC or controlling device to J4 pin 4 of the expansion PCB.
When the redundant remote on-off feature is selected, signals from two remote on-off switches are
necessary for the plasma power supply to work.
When the redundant remote on-off switch is set to OFF (disabled), electric power stays ON (active) to the
following parts:
■
Power-indicator LED on the front of the plasma power supply
■
Control PCB
■
Control transformer (can be different on input and output)
■
Input to the relay that controls the 48 V power supply
■
24 V power supply
■
120 V to the input side of the contactor or contactors
■
120 VAC
■
220 VAC on the power distribution PCB
■
120 VAC to the input side of the 40 V power relay
■
220 VAC to the input side of the cooler power relay
Connect for Communication
4
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811530 Instruction Manual XPR460
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