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Dual-Channel Radio Control Interface

£60.00 inc VAT

A general purpose dual-channel radio-control interface providing proportional motor speed control from a standard radio control system.

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The DMR-203 is a general purpose dual-channel radio control interface providing proportional motor speed control from a standard radio control system e.g. Spektrum, Futaba etc. It accepts two standard PWM inputs from the RC receiver and converts these to a suitable signal to operate two of our controllers, such as the DNO, PRO or 4QD ranges.

Applications include

  • Robots
  • Model railways
  • Model tanks
  • Remote controlled vehicles
  • Special effects
  • Other applications where powerful motor control via radio is required.


  • Mixed or tank style steering modes.
  • Dead-band areas on both centre and full stick positions.
  • Configurable failsafe system.
  • Switched or proportional output modes, with reverse drivers.
  • Signal validation and rejection for noise immunity.
  • Inputs optically isolated.
  • Low power consumption.
  • Compact and lightweight design.
  • Supplied with connectors and cable as diagram.

DMR-203 accessories

Suitable Controllers

The DMR-203 may be used directly with

  • DNO
  • VTX
  • Pro-120
  • 4QD series
  • Porter 5/10 by using this diagram

For controlling a Pro-150 the DMR-213 should ideally be chosen. However the DMR-203 can be made to work by following the notes on this page.



Supply Voltage 5.7-32.0V*
Supply Current 9.2mA
Power Consumption 50mW
Output Method 2KHz PWM 0-100% Modulation
Output Voltage 4.3V PWModulated
Input Signal
Input Method 40-70Hz PWM 1.5mS Mark Centre [RC STD]
Input Voltage 3.2V – 5.5V Max
Input Resistance 50Kohm
Failsafe Parameters
Valid Input 0.8-2.2mS Mark on PWM Input (450Hz – 1.25kHz approx)
Fail Time-out 300mS
Fail Output 0V (Zero)
Physical Attributes
Operating Temperature -40 – +90deg;C
Dimensions mm(“)(max) H 23.0(0.91) * W 54.0(2.12) * D 38.0(1.50)
Weight 53g


The manual is available in PDF format:

Adobe_PDF_file_icon_32x32   Read manual

The manual is designed to be printed double-sided in A4 booklet format. To print the booklet from the PDF on a double-sided printer, select Booklet in the Page Size & Handling section of the print window, and set Orientation to Portrait.