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LHD - Load Haul Dump

Laird Technologies AT16LHD and AT32LHD portable remote control systems provide reliable, efficient and convenient control of LHD equipment. This control system duplicates the manual controls in the cab of the load-haul-dump, allowing the operator to direct the equipment from a safer location.

Contact Laird Technologies today for your complete application solutions. 

Joystick Controller Features

  • Quick response
  • Accurate, secure radio control
  • CE, FCC and DOC approved (contact factory for other approvals)
  • Microprocessor control
  • Extensive self-diagnostics
  • Long battery operating life (NiCad rechargeable or alkaline)
  • Dustproof, waterproof high impact housings

Receiver/Decoder Features

  • Designed to be mounted on high vibration mining machinery
  • AT16LHD incorporates 16 independent functions, plus run on/off outputs
  • AT32LHD offers up to 5 digital proportional functions, plus up to 7 independent, as well as run
  • Systems also available with custom PWM (pulse width modulation) configurations
  • Multiple watchdog circuits
  • 2-digit system status display (acts as a central test point)
  • Automatic Safety Override (ASO) output monitoring
  • Addressing and time sharing to permit multiple units to share each radio frequency
  • Extremely high message security
  • Extensive self diagnostics
  • BCH data error
  • Auto select 12-24 VDC input power supply
  • Compatible with Autodig™
  • Optional joystick controller/transmitter styles with fiberglass or aluminum dustproof, waterproof high impact housings


Load Haul Dump Brochure


Technical Data & Specifications

Controllers (C01LHD, P06C) 

Dimensions C01LHD – 15cmH x 35.5cmW x 9.5cmD (6 x 14 x 3 ¾ inches), weight approx. 5.5 kg (12 lbs.) including battery.
P06C – 15cmH x 34.3cmW x 17cmD (5.9 x 13.5 x 6.7 inches) weight approx. 4.2 kg (9 lbs.) including battery.
Frequency Band UHF 450 MHz to 470MHz (others available on request).
Standard RF Power Output

20-40 mW output power (higher power available on request).

Spurious and Harmonic Emissions

More than 33 db below carrier.



Modulation Digital Frequency

Shift Keying (FSK).


C01LHD – Fiberglass NEMA (4x), P06C – Aluminum.

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

Receiver/Decorders (AT16LHD and AT32LHD) 

Dimensions Approximately 30.5cmH x 25.5cmW x 15cmD (12 x 10 x 6 inches)
Interface Type AT16LHD – mechanical relays normally open contacts 8A @250VAC or 5A @ 30VDC maximum, AT32LHD – proportional, current control with DDEC throttle control interface. Optional custom PWM configurations available.

Operate from -30ºC to +60ºC (-25ºF to 140ºF), with non-condensing relative humidity from 0 to 95%

Output Termination

AT16LHD – 16 pin connector (military specification), AT32LHD – 24 pin connector (military specification), Optional connector configurations available.


NEMA 4 steel (optional stainless steel or fiberglass) Individual EMI – shielded compartments for subchassis receiver, decoder and power supply. Entire sub-chassis mounts on inside door of NEMA 4 enclosure. Relays not in sub-chassis.

Power Requirements

12-24VDC ± 10% @ less than 2 amps, ± 20% @ less than 1 amp (12VDC), 24VDC (2 pin power connector) for both AT16LHD and AT32 LHD

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

AT AT_AT-S_Thumb

  • 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