The CircuitWerkes pREX is an incredibly powerful tool for managing and multiplying contact closures in your facility. The pREX accepts a wide variety of input signals and converts them to contact closure outputs. Because the microprocessor allows each relay to be individually programmed, the pREX can be configured in almost any way imaginable. Each relay can be triggered by any number of inputs, combined together using basic logic functions. Relay operating modes include: Momentary, Toggled, Leading or Trailing edge, Pulse stretching up to 4.5 hours, Input debounce, Maximum ontime and more. The pREX can be programmed using jumpers or from any computer with a serial port. Our pREX configuration manager gives you instant, graphical access to all of the setup commands.