IN-STOCK and Available Now from Weld Systems Integrators

UNITROL has created an ECONOMICAL, POWERFUL, and SIMPLE MICROCOMPUTER driven resistance welding control system designed to operate a large variety of equipment:

  • Mechanical pedal operated welders
  • Cam operated machine type welders
  • Computer driven welding cells
  • Multi-SCR systems
  • Foot or hand operated bench welders
  • High speed automated welding cells

The basic system is designed to control the welding transformer duties onlyNo solenoid driver is available on the UNITROL Fire’n Module control. The Fire’N Module can be purchased as a circuit board only for mounting in as existing cabinet with customer supplied SCR contactor or as a complete control with circuit board and SCR contactor mounted in an enclosure.

UNITROL Fire'N Module | Weld Systems Integrators

Operational Functions of the UNITROL Fire’N Module:

  • Simple thumb wheel settings
  • Microcomputer driven accuracy
  • 0-99 cycles of weld time, 0-99% weld heat
  • SCR pulse transformer driver system, NEMA protection
  • Input voltage: 115, 208/230, 380, 460, 575
  • 50/60 HZ operation
  • Input terminals for initiation, no weld, emergency stop, SCR and transformer
  • Over temperature thermostats
  • Automatic power factor


  • ½ cycle or full cycle count
  • First half cycle inrush protection on/off
  • Beat or non-beat initiation
  • Polar or non-polar firing


  • Upslope
  • Downslope
  • Pulsation
  • Dual heat / dual time
  • EHR (end of sequence) relay
  • RS-232 data input

Contact Weld Systems Integrators

Weld Systems Integrators (WSI) is your complete source for standard and custom resistance welders, consumables, spare and replacement parts and value added services. We offer WORLDWIDE shipping from our Warrensville Heights, OH location.

CONTACT Weld Systems Integrators, or REQUEST A QUOTE on standard IN-STOCK inventory or fully custom welding equipment. To speak with a WSI team member, please give us a call at 844-WSI-WELD or +1-216-475-5629.

Welding Controls  |  UNITROL from Weld Systems Integrators

© UNITROL Electronics