Power Board_Pcb2 Thermal Switch Circuit (0558038315) - ESAB Powercut 1600 Service Manual

SECTION 4 DESCRIPTION Of OPERATION
4.10.18

Power Board_PCB2 Thermal Switch Circuit (0558038315)

The Thermal switch circuit supplies +15 VDC out to the Thermal switch. This is then passed through the
thermal switch and returned to the power board where the voltage is passed to ground. The output of this
circuit is a logic low that is sent to the microcontroller on the Main Control Board PCB1. If the Thermal
switch opens, this will place a logic high on the microcontroller input and set a thermal fault on the PC1600.
The thermal interlock is "self-resetting" When the temperature of the monitored device cools to an accept-
able operating temperature, the fault is reset and output will return.
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