Micron MR603a User Manual

Micron MR603a 2.4GHz DSM2/DSMX Receiver
This document is regular updated and the most recent version may be found online at
http://micronrc.uk/mr603a
The MR603 receiver is designed for use in
larger scale model rail locomotives and road
vehicles. It provides a 3A reversible ESC for
brushed motors and 10 auxiliary outputs for
lighting, sound triggers, couplers, etc. It
operates on 2.4GHz and is compatible with
any Spektrum DSM2 or DSMX transmitter
including all of the Micron
MR603 requires Binding
already bound to that transmitter. Once bound, the transmitter should be switched on before the
MR603. If the transmitter is not switched on, MR603 will automatically enter bind mode 10 seconds
after switch on; it may also be configured to bind only manually using pads P5 and P6.
The MR603 free-air range, when used with a Micron low-power transmitter, is 50m-60m and
approximately 200m when used with a full-power (100mW) transmitter. This range will be reduced
indoors due to absorption by furniture / fittings and reflections from metal surfaces. Range is also
reduced if the receiver aerial is in a metal enclosure. Ideally, the aerial should be placed outside the
vehicle body and clear of any metal. The active tip of the extended aerial needs to 'see' the transmitter
so should be placed through a hole in the vehicle body - e.g. into the cab space. The MR603 aerial
should not be cut short or made longer as this will affect operation of the receiver. It is important to
perform a range check after installation to ensure you have full control of your loco/vehicle at all
positions around the layout.

Features

Compatible with all DSM2 and DSMX transmitters with up to 10 R/C channels, both Micron model
rail and aero model stick type transmitters.
4.5V to 10V working voltage range.
10 auxiliary outputs: 4 x F which are normally open switches capable of passing up to 2A; and 6 x
P which are 0V/3.3V logic outputs capable of supplying up to 20mA each. P outputs may also be
configured to drive servos.
Supports the Selecta
bound to change Selecta switch position.
The default configuration provides auto-switched front and rear LED lights on P1 and P2.
Receiver on-board LED can be repeated to any non-servo output (this is called the LED2 function).
All functionality may be configured by programming using a a suitable transmitter (most Micron tx
or a stick type model aircraft tx).

Connections, Configurations and Indicators

MR603 power input (positive & negative battery) and motor outputs pads are at one end of the
receiver. The pad spacing is 3.5mm which allows use of a terminal block if screw rather than solder
connection is preferred.
Auxiliary outputs are mostly on the long side of the receiver: 4 x 2A switches (labeled A to D) and 4 x
0V/3.3V logic outputs (labeled P1 to P4). There are also a 3.3V output, 0V (battery negative) outputs
and a 'L' input on the long side closer to the motor pade end. The 'L' input is used to monitor battery
voltage when a booster module is used, e.g. to raise a single LiPo cell to 12V. The 3.3V output can be
used to power attached components, the maximum current from the pin plus anything connected to
Micron R/C, www.micronradiocontrol.co.uk, +44 (0)1653 696008
where you will be able to view larger versions of the images.
model rail transmitters. The voltage range is 4.5V to 20V.
with your transmitter before use. If purchased with a transmitter, it will be
feature for compatibility with multi-loco transmitters, MR603 must be re-
Uplands House, Castle Howard Road, Malton YO17 6NJ
www.micronradiocontrol.co.uk
+44 (0)1653 696008
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