iPAK MPX Cascade

Medium Frequency DC Cascade Inverter Controls

iPAK MPX is an integrated timer/controller/inverter system for MF resistance welding which uses modular architecture to fire multiple MFDC power supplies. The control section is housed in a cassette-type casing, which simply mounts onto the power pack for ease of maintenance. Millisecond precision, constant current and constant power operation, with comprehensive monitoring, assures weld quality.




  • Independent calibration files for each transformer
  • Can build cascade programs to be executed in any order
  • Current/Power Monitoring: High/Low limits and Pre-limit
  • Proportional valve controller (0-10 V or 4-20 mA)
  • Pressure Monitoring: High/Low limits
  • Up to 3 analog inputs (2 x 0-10 V, plus 1 x 0-10 V or 4-20 mA)


  • Constant Voltage regulation / Constant Power
  • Isolation Contactors
  • Fieldbus Interfaces – InterBus-S, Profibus DP and DeviceNet
  • Plug-in option board provides 10/100Base-T Ethernet connection
  • ELR/1 Earth-leakage Relay
  • ELCR/1 Machine Protection Device
  • I/O Expansion
  • WSP3 hand-held Programming Pendant


  • Configuration for 2, 3 or 4 MFDC transformers
  • Spot / Repeat / Roll-spot / Seam (dual heat) / Seam (preheat)
  • Pulsation, Upslope and Downslope
  • Dual weld intervals per program (Preheat and Weld)
  • 64 programs (internal or external selection)
  • Constant Current regulation
  • Programmable blocking on fault
  • Weld Log keeps history of recent welds
  • Programmable outputs (events)
  • Retract/High-lift control
  • Single or dual gun operation
  • OHMA (Air over Oil) gun operation
  • Machine Sequencer Logic


  • WS98-iPAK PC Programming/Monitoring Software

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