Thermal Arc POWERMASTER 320SP, Руководство по обслуживанию

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page 14
Pc-board DK-DCDRV / DK-S3DRV
The pc-board DK-DCDRV is managing the primary drive level of the power unit 400SP and 500SP.
The pc-board DK-S3DRV is managing the primary drive level of the power unit 320SP.
!!! CAUTION !!! : there had been several changes at the boards, please read the detailed informations about the-
se changes on page 17.
Functions
- encoding power unit
- connection temperature sensor of heat sink
- supply current sensor
- monitoring bus voltage and supply voltage
- safety shut-down of power unit
- passthrough signal powerup relays
- passthrough signal „welding current on“ (from current sensor)
Encoding Power Unit
The type of the power unit is set via the DIP switch.
DIP 1 DIP 2 setting machine type
OFF OFF 240 A 400SP
OFF ON 270 A 320SP
ON OFF 300 A 500SP
ON ON reserved
LED displays
normal
LED state designation
1 (red) off primary overcurrent shut down
2 (green) on drive level of low-side is ok
4 (green) on bus voltage max is ok
5 (green) on drive level of high-side is ok
6 (green) on bus voltage min is ok
malfunction
LED state reason
1 (red) on primary current is too high, power unit has been switched off
2 (green) never on no drive level low-side
4 (green) off bus voltage is too high (e.g. mains overvoltage)
5 (green) never on no drive level high-side
6 (green) off bus voltage is too low (e.g. mains voltage too low)
Measuring Points
designation measure point result
supply voltage current sensor X2/1
X2/6 +
gnd
+15V DC
supply voltage current sensor X2/3
X2/6 -
gnd
-15V DC
temperature sensor X3/1
X3/2 gnd
+
10k
Ω
at 25°C
(about +2V DC)