Control card A004 includes these operational blocks:
• TIG ignition spark development
• TIG-torch start detection
Control card A004 functions / connectors
X1/1,3
Spark transformer primary (approx. 1 kV)
X2/1,3
360 Vac from aux. Transformer T002
X3/2
TIG-torch start detection
X3/3
13 Vac
X3/4
+ 24 V
X3/5
TIG ignition spark control
X3/6
GND
X4/1,2
TIG-torch start switch
X4
X1
X3
X2
Control card A004 layout
32