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Deltang Rx65c DSM2/DSMX 13V/18V Receiver with 3A Bi-Directional ESC
Please take a look at this notice on Rx65 availability.
Now with option to run at 18V
Rx65 is a 2.4GHz DSM2/DSMX receiver which includes one integrated 3A reversable controller for brushed motors (ESC) plus 11 auxiliary outputs (8xP, 3xF) for lighting, sound trigger, couplers, ... The voltage range is 3-13v in standard form or 8.5V-18v with add-on regulator.
The data on this page is for the latest version, Rx65c. Information on previous versions of the Rx65 maybe found on the Deltang web page. If your motor has a stall current greater than 3A, take a look at the Rx66 which can handle up to 18V and 6A.
Rx65 is available as board-only for you to add wiring or with a range of pre-wired leads / connectors. If the options below do not exactly meet your needs, please contact us to discuss your requirements.
An enormous range of programming features are provide to enable you to customise the operation of Rx65 to suit your model. See Rx65 v611 Programming for full details. Access to programming is either via a stick type transmitter or using the PROG3 programmer. A selection of program setups are provided as variants (-1, -2, etc.) - view the Variants tab for details.
The Rx65 has 1 x H, 8 x P and 3 x F outputs.
H: Rx65 is intended for surface vehicles which require forward and reverse motor control. For brushed motors this is achieved with an H-Bridge - the H outputs. H outputs have 256 step resolution in both directions (512 total). They control speed with pulse width modulation (PWM) which, by default, is set to its fastest (quietest) 12kHz setting.
Each H output can handle up to 3A current. The main constraint with current is heat in the receiver. Higher currents may be possible if heat sinks are added or the PWM frequency is reduced to 200Hz. Rx65 has one integrated ESC (H1). How the outputs are used has to be set with programming. Receivers are provided 'pre-programmed'. The default settings are shown on the instructions pages for each variant.
P: 'P' outputs are 'pads' with 'logic' type outputs. Pads are simply solder points for controlling external things. Logic outputs are either on or off (also known as high/low and 3.5v/0v in voltage terms). The action can be inverted so 'On' can mean 0v or 3.5v. P outputs are used to provide servo signals direct to the white/yellow lead on a servo. They can be used to directly control triggers on external sound cards - a series resistor, of 4k7 ohm or more, must be used if the external trigger open circuit voltage is greater than 3.3V. P outputs are also used to drive LEDs and need a resistor to limit current to no more than 20mA.
F: 'F' outputs are 'buffered' P outputs capable of controlling up to 2A. The buffer is a FET (Field Effect Transistor). These provide a path to ground (0v) when on and are floating (disconnected) when off. Technically they are called 'open drain' (the equivalent with a transistor which is more widely known is called 'open collector'). The Rx65 main board provides 3 x 'F' outputs, labelled A, B and C. F outputs are often used to control sound cards and lights.
The default receiver setting is for the Low Voltage Cutoff (LVC) threshold to be determined from the voltage seen on initialisation - basically, the receiver firmware makes a 'guess' at the battery type. The algorithm used for this calculation means that a 9V Alkaline or NIMH battery can often be interpreted as an almost discharged 3S LiPo. The solution is to either disable LVC, or set it to the correct value for your battery; this is done by programming the receiver.
Instructions for programming receivers using your DT transmitter are at the bottom of the information leaflet that came with the transmitter.
The receiver programming steps for LVC are:
e.g. to set the LVC to 6.5V, the programming steps are: 7 2 3 6 5
The Rx65c voltage limit was reduced to 13V due to issues with the on-board regulator device with input voltage over 14V. The Deltang view was that electrical noise from a motor with badly worn brushes or commutator was finding its way into the Rx65 regulator circuit and causing the device to operate outside its safe area. This regulator supplies the receiver microprocessor and radio transceiver with 3.3V.
The usual result was a dead regulator seen as no activity on the receiver LED. Suppressing the motor with 100nF capacitors and 10uF chokes in series with each motor lead does help but the number of failures meant that operation above 13V could not be guaranteed.
Micron has developed an add-on regulator which addresses the problem. This is a small board mounted on the bottom of the Rx65 (see photo). The original regulator chip is removed and the new regulator supplies the receiver. When fitted with this option, we guarantee Rx65 operation up to 18V. If you wish to use Rx65 above 13V, please select 'upgraded' from the Receiver Regulator menu below.
Please contact Micron if you want additional information on the issue.
The receiver is normally supplied as a bare board, with wiring options as specified in the menus below. If you want the receiver protected against accidental contact with metal parts, please select the 'heatshrink' option.
Receiver Variation, Antenna and Wiring Options:
The standard onboard 3.3V regulator is guaranteed for up to 13V operation. A Micron developed upgrade supports reliable operation at 18V. See the Rx Regulator tab for details.
throttle control method applies only to -2 and -22 variants
Other wiring options are available, contact Micron to discuss your requirements.
The receiver has a low-voltage cutoff facility which stops the motor when the battery has reached its discharge voltage. The default setting is for LiPo batteries. If you are using NiMH, the LVC should be disabled - see Low Voltage Cutoff tab.
Spare 150mm aerials are available for the remote aerial version of Rx65 and Rx66. The remote aerial will not fit the standard wire aerial version of the receiver as this does not have the required socket; only the remote aerial version of the receiver has the socket.
Spare Remote Aerial: £ 1.15