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Mobile Feeder Breakers

Portable Radio Remote Controls allow operators of Feeder Breakers to choose the safest position with the best vantage point from which to operate. This means safer, more efficient operation, increased production and lower operating costs.

Laird Technologies AT system is at the heart of the MSHA-approved Feeder Breaker system which is engineered and built to operate reliably in the harsh environment of an underground mine. The toggle-type controller has a unique shape and style that provides the operator with a controller that is durable, lightweight, ergonomic, and convenient. It has a highly advanced encoder circuit board which is built using industrial grade components, a powerful microcomputer, and sophisticated operating software. All components are protected by a thick-walled, epoxy-coated extruded aluminum case. The ends of the housing are rubberized metal plates that make shock absorbing end “bumpers”. Only the highest quality mil-spec toggle switches are used and have been field-tested and proven under extreme conditions.

The Feeder Breaker system is built with Laird Technologies' 60+ years of RF experience. Its dependability and high signal integrity ensure that your production will continue with the highest possible safety and reliability. Every roof bolter radio remote control system is backed by Laird Technologies unparalleled service and support. For complete details and specifications call our nearest office or representative.

Contact Laird Technologies today for your complete application solutions. 


  • POWER ON/OFF SWITCH – When the switch is set to ‘ON’, internal battery power is applied to an RF transmitter within the toggle controller.
  • ESTOP PUSHBUTTON - This momentary pushbutton stops all functions and is the quickest way to shut down the Machine. Once pressed to stop all machine motion, the POWER ON/OFF Switch must be turned ‘OFF’ then back to ‘ON’ to resume operation of the machine.
  • PUSH-TO-OPERATE (PTO) BAR - This bar is a large, full length, spring-return switch located on top of the unit that is used as a safety device that electronically disconnects all motion switches when it is released, thus stopping motion commands from these switches. The switch is easily and naturally activated by a convenient and comfortable part of the operator’s hand and must be pressed before and held when commanding movement of the ‘TRAM’ and the ‘BOOM’. It should be noted that operation of the PTO bar is not required to select ‘TRAM MODE’ or ‘BOOM MODE’.
  • TRANSMIT & LOW BATTERY LED – Located on top of the controller, this LED is part of the battery management system and flashes green when the controller’s Power ON/OFF Switch is set to ‘ON’ and the controller is transmitting with a good battery installed. The LED flashes red when the battery is low and sounds a beeper to alert the operator. In addition, a low battery cut-off circuit stops the controller micro-processor when voltage goes below safe operating range. This is because RF transmitters always operate at full power over the entire life of the battery. 


Mobile Feeder Breakers Brochure



MSHA Certification 2G-4127-0
Case Material 3.0 lbs (1.3 kg) with battery
Dimensions Approx. 9.8” H x 3.6” W x 4.1” D (25cm x 9.1cm x 10.4 cm)
Environmental  -22° F to +140° F (-30° C to +60° C), Indoor/outdoor use; contact for extremes
Switch Types Toggle, Push Button, Paddle, Rotary, Lever type switches (stepped or stepless)
Number of Functions Up to 40 Digital and/or 2 Analog
Keylock Switch Optional (Power ON/OFF)
Antenna Internal standard or external optional
Additional Functions Contact factory or sales representative for details
Aux Functions Up to 15 digital ON/OFF
Push to Operate(PTO) Bar Standard
Battery Voltage 12.5 VDC nominal
Radio Transmitters UHF, pulsed packet data, FSK
Approvals USA, Canada, UK, South Africa, Brazil; Contact for complete listing
Power Output Variable - dependant upon application requirements and licensing limitations
Emission/Modulation 14K0F1D +/-5 KHz deviation; 9K0F1D +/-2.5 KHz deviation (narrowband)
Operating Range Greater than 300 ft. (93m) line of sight
Continuous Battery Alkaline ; Ni-Cad - Battery life dependant upon application
Carrying Case Optional shoulder strap and/or swivel belt clip, can also be used with ergonomic vest harness

Specifications are subject to change without notice. Check with the factory for confirmation. 

Machine Control Units


  • 1-32 relay outputs + ON/OFF (mainline)
  • Extensive self-diagnostics
  • Automatic safety override (ASO)
  • Multiple "watch dog" timers
  • EMI/RFI shielded/compartmentalized sub-chassis
  • Plug-in micro-controller with e-prom allows quick "personality" changes
  • FCC/DOC/EC non-licensed and licensed systems available


AT Brochure