APPENDIX A: TECHNICAL SPECIFICATIONS
DUAL PULSE 125
STORED ENERGY RESISTANCE WELDING POWER SUPPLY
A-8 990-270
Shorting Pin 4 to Pin 5 will close the Charge Inhibit Line, and prevent recharging of the Capacitor Bank
while a weld schedule is being selected. This line must be closed immediately after the power supply
fires, before the 60 ms commutation pulse has ended. See Firing Circuit.
The weld schedule is selected by shorting across Pin 5 and the appropriate pins coded to the BCD
(binary coded decimal) pattern shown in figure 2-9. The charge inhibit line must be closed or the
capacitor bank will begin to recharge before the correct schedule has been selected.
The schedule is executed by disconnecting Pin 4 from Pin 5 and opening the charge inhibit line.
BCD codes are listed below:
Input Pin Numbers
1 (2
0
)
2 (2
1
) 3 (2
2
) Schedule
0
0 0 Front Panel Control
1
0 0 #1
0
1 0 #2
1
1 0 #3
0
0 1 #4
1
0 1 #5
0
1 1 #6
1
1 1 #7
* 1 = Switch Closure
Physical Characteristics
See figure 4-5.
Height:
9.50 inches (24.2 cm)
Width:
13.00 inches (33.0 cm)
Depth:
13.25 inches (33.7 cm)
Weight:
44.0 lbs. (20.0 kg)
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