WS500 Weld Control Kit

AC Welding Controls

The WS500 Kit is designed to provide a compact, durable and user friendly control solution for either new or rebuilt resistance welding machines. User programming and monitoring are simple using a built-in tactile keypad in conjunction with backlit LCD display.

The WS500 Kit (Part Number 94-10-29-USA) consists of:

  • WS500 Timer
  • Power Card (Firing Board & Synchronization)
  • Control Transformer (Line Voltage; 580, 480 and 240)
  • Power Supply (24V DC)

Other Options are:

  • Fuse Kit (UL)
  • Resistor (680 ohm)
  • HD Resistor (500 ohm)
  • 1200 amp SCR
  • 1800 amp SCR



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


  • 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

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