FMR-203,FMR-203SS
27MHz, 2-Channel FM Receiver.

Features

• 2 versions - FMR-203 (1 Digital output and 1 Solid state output) FMR-203SS (2 Solid state outputs)
• Crystal Controlled
• Low supply voltage, highest reliability, low power drain
• Two Channel Receiver

FM receiver
 Click image to enlarge
Download Datasheet

Description
Products in the Range
Technical Data
Block Diagram
Receiver Selection Table

Description

The FMR-203 is a crystal controlled two channel receiver (where one is a digital output and one is an open collector output), comprising of receiving, decoding and open collector output sections. A specially designed LARGE SCALE INTEGRATED CIRCUIT (LSI) is employed in the decoder section, which ensures operation at low supply voltage, highest reliability, associated with very low power drain.

The receiver works on a digitally encoded 27 MHz frequency modulated (FM) signal. It may be used in an application that requires the 27MHz receiver to be mounted on a printed circuit board.

If the code of the input signal (from a transmitter) matches the setting of the coding switch on the receiver (up to 1024 combinations), an output is obtained i.e. the open collector is switched to ground.

Connection to the receiver is via a six-way female connector. The male connector can be soldered onto any type of printed circuit board, requiring a 27 MHz receiver. The male connector is available as a Nylon 6-way male low profile connector, part number 6WLP or high profile connector part number 6WHP. See design dimensions page for more details.

Elsema’s ANT27MHz series antennas will give a reliable control range of up to 200 metres, when used with Elsema’s FMT-301, FMT-302 and FMT-304 transmitters.

The default mode is in momentary mode, i.e. the output transistor is only activated while the correct signal is received.

Care must be taken, not to bring a receiver near strong magnetic fields, such as DC-Motors, speakers, magnets for reed switches, transformers etc. as it would magnetise the coils and may cause severe de-tuning.

The FMR-203 has 2 versions:

Versions
FMR-203
FMR-203SS
Outputs
1 Solid state output and 1 digital output
2 Solid state outputs.

Compatibility

All Elsema type FMT-… series
KEY-301, KEY-302, KEY-304
FMT-301, FMT-302, FMT-304
FMT-401, FMT-402, FMT-404
FMT-312E, FMT-31202E, FMT-31204E

Products in the Range

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Single Channel Receiver with Open CollectorOutput
FMR-203
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FMR-212
Single Channel Receiver with Relay Output
FMR-212T
Single Channel Receiver with Timer Controlled Relay Output
FMR-24001
Single Channel 240V Receiver with Relay Output
2 ch 240VAC FM Receiver
2ch FM receiver with relay output
4ch FM Receiver with relay outputs
4ch FM Receiver with relay outputs
4 or 16 ch FMR receiver
FMR-24002
2-Channel 240VAC Receiver with 2 Relay Outputs
FMR-202
2-Channel Receiver with 2 Relay Outputs
FMR204-12
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FMR204-24
4-Channel 24V Receiver with 4 Relay Outputs
FMR-204/16
4/16 Channel Receiver with Open Collector Outputs
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Receiver for multi-channel system
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FMR-232R
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FMR-100
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RXD-101
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Technical Data

Supply Voltage 7.5-20 Volts DC, absolute max +30 Volts DC
Current Consumption 10mA stand by
Receiving Frequency 27.145MHz (Other frequencies available: 27.045, 27.195 & 27.455MHz. NB. 27.455MHz is available for Europe Only)
Type of Crystal Used 26.690MHz, 3rd overtone, 20pF, 30ppm at 0-50°C
IF Freq 455kHz
Selectivity At least -40dB at ±10kHz
Sensitivity Better than 1uV (for transistor to switch on)
Type of demodulation Narrow-bandwidth Frequency Modulation (FM)
Band Width ±2.5kHz
Decoding System Onboard 10-way coding switch (1024 digital channels)
Output

Transistor output maximum-swithcing 100mA/40 Volts DC
Transistor is normally "off", it switches "on" if correct code is received

Connections 6-way female connector type
Male connector is soldered to a PCB
Antenna Elsema’s ANT27MHz series antennas or piece of approximately 300 mm long wire for short range applications.
Dimensions 88 x 43 x 15mm
Mounting Hole Size 3.97mm or 5/32"
Mounting Hole Spacing Length 81.28mm (3.2")
Width 35.56mm (1.4")
Weight 28.5g
Compatible Transmitters All Elsema type FMT-... 27MHz series and KEY-3.. series

NB:
All input & outputs are protected against possible transients or static charges
If antenna is a piece of wire, install away from metal parts
Keep coils L1 & L2 away from magnetic components such as speakers, motors, transformers etc
Do not change factory tuning of L1 & L2 coils

Circuit Diagram

Dimensions