WS2003 Cascade

Constant Current Controls with up to 16 SCRs

The WS2003 Cascade is an advanced controller that can fire up to 16 SCRs in Cascade fashion. Because of its highly modular construction, it lends itself to integration into customer control cabinets and retrofits, as well as completely self-contained applications. The variety of "add on" accessories makes this controller one of the most versatile on the market.




  • Individual calibration files for each SCR
  • Current Monitoring: High/Low limits and Pre-limit
  • Easy calibration to external monitor; Primary or Secondary sensors
  • Force Monitoring: High/Low limits in lbf and kN
  • Easy calibration to external force gauge


  • Fieldbus adapters – Profibus, Interbus, DeviceNet
  • 10/100Base-T Ethernet Adapter
  • 3-phase Adapter
  • Medium Frequency Adapter
  • Isolation Contactors
  • Earth-leakage Detector
  • Two-hand Start
  • WSP3 hand-held Programming Pendant


  • Configure to fire 2 SCRs up to 16 SCRs using one timer
  • Welding modes: Single, Repeat & Half Cycle Spot, Single or Repeat, Seam, Dual Seam or Roll Spot
  • 64 weld programs
  • Constant Current – program weld current in kA
  • Programmable Force in lbf/kN (4-20 mA or 0-10 VDC)
  • Internal or binary program selection
  • Fault output with selectable Head-lock function
  • Weld History Log keeps last 64 welds
  • Wait for pressure function before weld
  • Upslope and Downslope
  • 16 inputs (24 VDC) – extended on Cascade/Multi-Valve
  • 12 outputs + SCR pulse drive (24 VDC can drive 110 VAC loads) – configure up to 16 SCRs
  • End of Sequence output
  • 3 modes of Retraction + Air/Oil (OHMA gun compatible)
  • Weld Counter
  • Stepper function with pre-set curves and end-blocking for up to 16 electrodes
  • Machine Logic Sequencer
  • Programmable outputs
  • RS232 port for pendant or PC connection


WS98-2003 PC Programming Software


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