WS500 Flat Pak

AC Welding Controls in Kit Form

The WS500 Flat Pak Kit is a complete control with timer connected to power plate for mounting in customer-provided enclosure. The WS500 provides basic control for resistance welding. User programming and monitoring are simple using a built-in tactile keypad in conjunction with backlit LCD display.


  • Cross-interlock facility (2 options)
  • Built-in test routines
  • Connections via plug-in connector block


  • 3 Power Options – No SCR; water-cooled SCR sized for up to 150 kVA; water-cooled SCR sized for up to 300 kVA
  • ELR/1 Earth-leakage Relay
  • 2-hand Start unit
  • 8-position Remote Program Select unit
  • 3PA/2 3-phase Adapter
  • Dual Gun Adapter


  • 440 VAC or 220 VAC operation
  • 50 Hz or 60 Hz operation
  • 24 VDC Inputs/Outputs
  • 4 inputs and 4 outputs plus weld on/off
  • 1 to 8 programs, depending on mode of operation
  • Configurable for Single, Spot, Repeat Spot, Half Cycle, Roll Spot, Seam
  • Two weld intervals, Upslope and Pulsation
  • Retract/High-lift option
  • Counter with configurable lock-out