APPENDIX A: TECHNICAL SPECIFICATIONS
875DP/500DP/500HV DUAL PULSE
RESISTANCE WELDING POWER SUPPLIES
990-290
A-23
Table A-4. Input Power Specifications
Front Panel Switches
There are 22 electro-statically shielded membrane switches which are integral to the front panel. The
function of each key is defined in Chapter 4.
Microprocessor CPU
The power supply uses a Motorola M68HC11A1 CPU with an 8.0 MHz clock, 8K bytes of random access
memory, 512 bytes of electrically programmable read only memory and 128K bytes of ultraviolet erasable
and programmable read only memory.
Display
This is an electro-statically shielded, 8 row by 40 column, rear lit liquid crystal cold cathode display. A
contrast level adjustment potentiometer can be accessed through a hole in the right side of the cover. The
energy display accuracy is 0.5%. The resolution of the display ranges from 0.1% to 0.6% energy,
depending upon the amount of energy selected. Energy can be displayed in either watt-seconds or % of 875
(500 for the 500DP and 500HV) watt-seconds.
Nominal
Line Voltage
(Volts RMS)
Line Voltage
Range
(Volts RMS)
Line
Frequency
(Hz)
Peak Input
Current * (Amps)
500DP 500HV 875DP
Circuit Breaker
Size (Amps)
500DP 500HV 875DP
Circuit
Breaker
Quantity
100
87
-
113 50/60 46 46 46 15 15 15 1
115
100
-
130 50/60 40 40 40 15 15 15 1
208
180 - 235
50/60
23
23
23
8
8
8
2
230
200 - 260
50/60
20
20
20
8
8
8
2
* First half-cycle.