THERMAL ARC ARCMASTER 400 MST Manuel D'opération page 20

2.05 Functional Block Diagram
Figure 2 illustrates the Functional Block Diagram of the 400 MST-power supply.
Input
Main Input
Circuit Diode
Power
Switch
Filter
Down
Transformers
AC115V,AC24V
(T3)
Over
Current
Protect
14PIN
Receptacle
(CON1)
19PIN
Receptacle
(CON2)
2.06 Transporting Methods
This unit is equipped with a handle for carrying purposes.
ELECTRIC SHOCK can kill. DO NOT TOUCH live electrical parts. Disconnect input power conductors
from de-energized supply line before moving the welding power source.
FALLING EQUIPMENT can cause serious personal injury and equipment damage.
Lift unit with handle on top of case.
Use handcart or similar device of adequate capacity.
If using a fork lift vehicle, place and secure unit on a proper skid before transporting.
IGBT
Capacitor
Inverter
DC Power Themal
Detector
Primary
Voltage
Sensor
To each control circuit
Drive
+/-15VDC +18VDC
Circuit
+24VDC +5VDC
Trouble
Sensing
Circuit
Figure 2. 400 MST Model Functional Block Diagram
Output
Main
Diodes
Transformers
Themal
(T1)
Detector
Thermal Stick Mode
Sensor VRD
Circuit Sensing
Circuit
Primary
Circuit
Sensor
Sequence
Control
Current Reference
Adjustment Adjustment &
Circuit Mode select Switch
Panel Circuit Boad
WARNING 1
WARNING 2
14
Hall Current
Transformer
(HCT1)
Output
Inductor
Lift T ig Mode
Output Short
Sensing
Circuit
Fan Control
Fan
Circuit
14PIN-19PIN
Select Switch
(S3)