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Red Jacket® ISOTROL™ Control Box

The most adaptable dispenser handle signal isolation solution on the market is called the Red Jacket® ISOTROLTM 1-8 Control Box. In order to comply with NEC regulations, it offers a way to disconnect all external voltage sources, including feedback, during times when the dispensing equipment is being maintained and serviced.

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  • Features
  • Specifications
  • Four configurations
  • Isolates the handle signals between each dispenser.
  • Isolates and protects individual dispensers from wiring shorts or phasing issues.
  • Isolates and protects technicians from dangerous feedback during service.
  • Ready interface with the Red Jacket® IQ Control Box and/or the TLS-450PLUS.
  • Compliant with NEC requirements for handle isolation.
  • Accepts up to eight individual dispenser signals.
  • If ordered without relay, it must be used with another component for motor control.
  • Dedicated Automatic Tank Gauge (ATG) line leak output and coil for easy compatibility with Pressurized Line Leak Detection (PLLD).
  • Terminals are labeled for easy wiring and compatibility.
  • May be used with all Red Jacket and competitive submersible turbine pumps.
  • Easily retrofitted to existing locations.


Type 1 enclosure, 6”x6”x4”

DISP Inputs

10 mA @120V or 240V 50/60 Hz

Control Circuit

15 mA @ 120V 50/60 Hz or 240V 50/60 Hz

ATG Output

750 mA @ 120V or 240V 50/60 Hz

Control Relay

30A DPST 120/240VAC 50/60 Hz



14-28 AWG

10-18 AWG Main

  • ISOTROL™ 1-8: 8 input isolation only control box. Use with IQ, standard control box or three phase magnetic starter
  • ISOTROL™ 1-8-i: 240VAC – international equivalent to above unit
  • ISOTROL™ 1-8R: 8 input isolation with 30-amp. 2HP motor relay
  • ISOTROL™ 1-8Ri: 240 VAC – international equivalent to above unit

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