FMR-224 is a crystal controlled single channel receiver,
comprising of receiving, decoding and relay-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.
receiver works on a digitally encoded 27 MHz frequency
modulated (FM) signal. It may be used in applications such
as the remote control of garage doors, gates, lights,
alarms or in any other new or existing installations where
the use of conventional wiring is difficult or impossible
code of the input signal (from a transmitter) matches the
setting of the coding switch on the receiver (up to 4096
combinations), an output is obtained i.e. the relay
operates. This relay provides a clean set of contacts for
switching DC current up to 5 Amps.
to the receiver is via a six-way screw-type terminal
antenna, a piece of any type of wire, approximately one
meter long, will be sufficient for a reliable control
range of up to 400 metres, with our FMT... hand
transmitters. A longer wire or a proper 27 MHz CB-Antenna
should further improve performance in reception. If a
CB-Antenna is used, the shield of the cable must be
connected to the "minus terminal".
Button (designated as "TEST") is provided for relay output
momentary mode (MOM) the relay is only activated while the
correct signal is received. When changing the slide switch
from "MOM" to "FF" (flip/flop mode) the output relay is
toggled with every correct incoming signal. This enables
the direct use for switching on/off lights etc. In
flip/flop mode, the relay always
at the initial "power-up".
If a "latching-on"
output is required, for example receiver is used together
with a "Panic Button", a wire link is to be fitted as
shown below. In such a case the relay can only be reset
again by momentarily interrupting the supply.
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
the coils and may cause severe
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