ATC Diversified ARM Triplexor/Quadraplexor Alternating Controllers w/Intrinsically Safe inputs

ARM Tri/Quad Series*

The ATC ARM triplex and quadraplex controllers are available with either Sequence-On-Simultaneous-Off (SOSO) or First-On-First-Off (FOFO) output logic. The special function models are differentiated by a rotary switch that allows any output to be locked as the lead load or any one load to be omitted while sequencing only the remaining loads. In addition to load omission and lead selection, the expandable model can be set for 2, 3, or 4 load operation with either SOSO or FOFO logic.

All models feature intrinsically safe inputs and logic that allows the outputs to operate properly even if one of the inputs fails to open or close. An inrush delay on all models reduces line sags by preventing multiple loads from energizing simultaneously.


  • Three and four load output models
  • Intrinsically safe inputs
  • FIFO (First-On-First-Off) & SOSO (Sequence-On-Simultaneous-Off) versions
  • Optional omit/lead selection switch
  • UL913 listed device


  • Pump sequencing
  • Level control
  • Lift stations
  • Motor protection
  • Other industrial applications
More Information
Features Automatic Alternating
Manufacturer ATC - Diversified
Power 120V AC
Type Alternating Relays & Controllers
Additional Skus ARM-120-AAE, ARM-120-AAEP, ARM-120-ABE, ARM-120-ABEP, ARM-120-ACE, ARM-120-ACEP, ARM-120-ADE, ARM-120-ADEP, ARM-120-AGE, ARM-120-AGEP, ARM-120-AHE, ARM-120-AHEP
Additional Details

*Pricing & appearance may vary based on configuration!* Please configure product above.

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