APPENDIX A: TECHNICAL SPECIFICATIONS
MODEL 250DP DUAL PULSE
RESISTANCE WELDING POWER SUPPLY
A-18
990-280
Binary Schedule Selection Code
To select a schedule, connect the pin(s) corresponding to the schedule number to Pin 11. The schedules
listed below are selected using the pin indicated by the 1 marked under the pin number. To select any
other schedule number, select the schedule numbers whose sum equals the desired schedule, then
connect all of the corresponding pins.
For example, to select Schedule 127, connect the pins which correspond to the numbers totaling 127.
Schedule 127 = 1 + 2 + 4 + 8 + 16 + 32 + 64
Connect Pins 1, 2, 3 , 4, 12, 5 and 14 to Pin 11 (ground)
When all input pins are open, control of the power supply remains at the front panel. When any one of
the pins is shorted, the front panel controls are disabled. The capacitor bank will begin to recharge 60
milliseconds after the end of the previous pulse unless the charge inhibit line is grounded. Therefore,
any change in the schedule selection code should be made during this 60 millisecond period and/or
while the charge inhibit line is grounded.
Alarm stop conditions can also be cleared remotely by toggling the charge inhibit line.
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2
6
2
0
2
1
2
2
2
3
2
4
2
5
COM
BINARY SW ITCH
1
2
3
4
12
5
14
11
2
6
2
0
2
1
2
2
2
3
2
4
2
5
COM
250DP
Figure A-6. Remote Schedule Selection with a
Remote Binary Switch
