Control card A002´s functional blocks:
• PWM-development
• Primary IGBT control
• Current and voltage adjustment loop
• Aux. Voltages development + 5, ± 15, + 16 and + 24 V
• Secondary overvoltage watch
• Primary current limiting circuit
• Net overvoltage and undervoltage watch
• Fan control power stage
• Solenoid valve control power stage
• Cooling unit control power supply
Control card A002 functions / connectors
27
X1/1
Machine size detection (1600/2500)
X1/2
Set value from the remote controller
X1/3
Process selecting from the remote controller
X1/4
Overheat protections (PTC)
X1/5
Machine size detection (2000)
X1/6
Fan control
X1/7
Net voltage watch from the aux. Transformer T002 secondary
X1/8
-
X1/9
Welding current; DC+ or AC positive half cycles
X1/10
Welding current; DC- or AC negative half cycles
X1/11
Welding voltage; DC+ or AC positive half cycles
X1/12
Welding voltage; DC- or AC negative half cycles
X1/13
Net overvoltage watch
X1/14
Control amplifier (N6-A) output
X1/15
TIG-torch switch
X1/16
AC TIG auxiliary pulse control
X2/1 Solenoid valve
X2/2 TIG ignition spark control
X2/3 Set value from A001
X2/4 PWM enable
X2/5 Secondary IGBT control
X2/6 Secondary IGBT control
X2/7 + 16 V
X2/8 + 16 V
X2/9 + 5 V
X2/10 + 5 V
X2/11 GND
X2/12 GND
X2/13
Cooling unit start
X2/14
Stop-command from the cooling unit
X2/15
Inverter frequency 18/36 kHz
X2/16 Machine size detection (3500)
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