ESAB Mig 4002cw - Terminating Resistors; CB0:4 Temperature Monitoring

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1sxx02cw
Terminating resistors
In order to avoid communication interference, the ends of the CAN bus must be
terminated by resistive loads.
One end of the CAN bus is at the control panel, which incorporates a terminating
resistor. The other end is in the power source and it must be fitted with a
terminating resistor. If a CAN remote control with terminating resistor is connected
to the power source, the terminating resistor must be removed from the power
source.
The CAN remote controls and CAN adapters have a built--in terminating resistor.
This resistor can be disconnected or connected by moving a jumper (See the
service manual for the CAN based remote controls, filename 0740 800 170).
CB0:4 Temperature monitoring
Thermal cutout switch B1 is mounted under the winding of main transformer T1,
and opens at a temperature of 160
o
C. The duty cycle is valid for 40
o
C. Thermal
cutout switch B2 is mounted on the heat sink, beside the IGBT transistors, and
opens at a temperature of 75
o
C.
If either of the switches operates, the power source is stopped and LED D1 on the
front panel lights. The power source cannot be restarted until it has cooled
sufficiently for the switch(es) to close.