The Contactor Pro panels are complete "turn-key" solutions for activating larger systems of ProMelt Mats and Cables when used in combination with a PM-224, PM-824, or PM-HSC5 snow detector. They're available in three panel sizes: 50 Amps, 100 Amps, and 200 Amps. An additional 200-amp extension panel allows coverage for even larger systems. 120V, 208V, 240V, or 277V is supplied to the panel and a 24V Class 2 transformer allows connection to the snow detector. Each Contactor Pro panel is complete with "system on" indicator light, manual override by a 4-hr timer, simple 24V wire terminal connections to the snow detector, and outputs for connection to an extension panel. The CP-50 has one 50-amp contactor, the CP-100 has two 50-amp contactors, and the CP-200 has four 50-amp contactors. Systems should be designed to connect one or more ProMelt Cables or Mats in combinations not to exceed the capacity of individual 50-amp contactors. Each panel is NEMA Type 1 for mounting indoors on a wall, has knockouts for conduit, and measures 12" x 12" x 4".