SJE-Rhombus SES Controls EZ Series

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Relay Logic Series™ Duplex

Single Phase Duplex

The Relay Logic Series™ Duplex control panel is simple, rugged and reliable.

The Relay Logic Series™ (RLS) Duplex control panel provides a reliable means of controlling two alternating 120, 208, or 240V single phase pumps in pump chambers, sump pump basins, irrigation systems and lift stations.  The alternating action equalizes pump wear.  This system provides override control should either pump fail.

Magnetic motor contactors are used to turn the pumps on and off..  If an alarm condition occurs, an alarm switch activates the audible/visual alarm system.  Standard components are used allowing for easy troubleshooting and service.


Relay Logic Series™ Duplex


  • Controls two alternating 120, 208, or 240V single phase pumps
  • NEMA 4X lockable enclosure rated for indoor/outdoor use
  • Magnetic motor contactor turns the pump on/off
  • Alarm test/normal/silence switch (exterior)
  • HOA switches for manual control of the pumps
  • Relay logic provides pump control and alternation
  • Pump run indicator lights
  • Circuit breakers provide pump disconnect, branch circuit protection, and control/alarm power disconnect
  • Ground lugs
  • Spare replacement control relay
  • Float switch terminal block
  • Input power terminal block
  • Red alarm beacon and horn
  • Horn silence relay

UL/cUL Listed

Five-Year Limited Warranty



Relay Logic Series™ Duplex


120/208/240 VAC


7-15 Amps

14 x 16 x 6 inches (35.5 x 30.5 x 15.24 cm)
NEMA 4X (ultraviolet stabilized thermoplastic with removable mounting feed for indoor or outdoor use)

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