• Bottom Flange = 31" Square
  • Roof Opening = 24" Square
  • Curb Height = 12"
  • Made In The USA





      Fast Cycle Input Card



      • Designed For Zero Cross Type Solid State Relays With DC Control
      • Mounts Directly On The Relay Control Terminals
      • Operates From A Standard Instrumentation Signal Of 4 ~ 20mA
      • Utilizes A Time Proportional Cycle Rate Of Less Than One Second
      • 4V-AC Cycles On And 4V-AC Cycles Off At 50 Percent Power
      • Allowes Using High Watt Density Heaters With Fast Cycling



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      • This Loop-Powered Firing Card Was Developed By Watlow Electric.  It's Design Enables Very Rapid Cycling Time.  The Use Of This Solid State Relay Control Provides A More Accurate Temperature Control, Extends The  Heater Life Especially With Higher Watt Density Heaters.