ELSEMA FMR15104240 4 Channel 151MHz FM Receiver with Main AC Supply User Guide
- June 4, 2024
- ELSEMA
Table of Contents
ELSEMA FMR15104240 4 Channel 151MHz FM Receiver with Main AC Supply User
Guide
Features
- Supply voltage 240VAC (also available in 110-120VAC supply for international markets)
- High efficiency toroidal transformer
- High capacity output relay
- Pluggable type terminal blocks for easy installation
- Test push buttons for the relay
- Momentary, Latching and Security Latching modes are all user selectable
- Optional QM150 bracket available for easy mounting to cases or walls
- Also available in an IP66 rated case for outdoor installations.
Applications
- Pump Control
- Long distance light control
- On/Off applications in agricultural devices
- Basic Telemetry eg. Water level indication
- Security alarm
Description
This receiver can be connected directly to the mains supply, 240VAC. There are four relay outputs that can switch currents up to 8 amps at 240VAC. The relay mode can be set to momentary, latching or security latching.
The user can select 8 different narrow band frequencies and program unlimited number of transmitters to the receiver. With the narrow band FM 151MHz signal from the transmitter a line of sight operating range of 5000 metres is possible. The receiver uses a crystal oscillator circuit that ensures high frequency stability allowing optimal performance in the receiving range.
The toroidal transformer on this receiver is 25-30% more efficient than the conventional types. It has a low operating temperature, low hum and low stray magnetic field.
Connecting wires to the receiver has been made easier by the pluggable type terminal block. An on board LED indicates when power is connected and an extra LED on the board to indicate when the relay is activated. There is a test button for the relay output to test your connections.
The receiver’s high capacity output relay is capable of switching up to 16 Amps of resistive load and up to 8 Amps of inductive load. A world first for a standalone receiver.
The receiver can be mounted to a Quick Mount or in a weatherproof case with an IP66 rating.
Available with Options
Output Modes
Relay output on the receiver can function in either momentary or latching mode. By default the mode is set to momentary. Modes selectable from the 4-way dipswitch. Dipswitch 1 corresponds to relay channel 1 and dipswitch 2 corresponds to relay channel 2 and so on.
Factory Default = Momentary
Momentary – Output is active for as long as the transmitter button is
pressed.
This is a standard mode on most automatic gates or garage door openers.
Latching – Output remains active until next press of the transmitter button. Similar to switching “on” and “off” a light.
Security Latching – Output remains active until power to the receiver is removed. Similar to security alarms and fire alarms. To activate the security latching mode, a link needs to be soldered into the hole marked as latching.
Customised Software
Custom output modes can be programmed to do special functions. Call Elsema for
more details.
Coding
The 12 way dip switch on the receiver sets the 12 bit unique code for the system. This has to be matched to that on the transmitter.
Apart from the 12 way dip switch there is an additional 1 way dip switch :
This 1 way DIP switch on the right side of the 12 way dip switch denotes the channels. See table below.
Generally to use a 4 channel Tx to 4 channel Rx match all the 13 dip switch (12way + 1way just on the right side of the 12 way).
To use an 8 channel Tx to control 2 x four channel Rx match all the 12 dip switch and switch 13 “OFF” on the first Receiver and switch 13 “ON” on the second Rx.
To use 4 x single channel transmitter to control a 4-channel receiver, match all 13 dipswitches and change dip switch 14 & 15 on the transmitter as per below table.
| SW14 | SW15 | Channel |
|---|---|---|
| OFF | OFF | 1 |
| OFF | ON | 2 |
| ON | OFF | 3 |
| ON | ON | 4 |
Signal Strength Indicator
The 151MHz receivers have five blue LED’s on the board. The table below indicates the level of the valid transmitted signal.
| 5 LED’s on | -70dBm | Very Strong signal | Very Reliable operating conditions |
|---|---|---|---|
| 4 LED’s on | -75dBm | Very Strong signal | Very Reliable operating conditions |
| 3 LED’s on | -80dBm | Very Strong signal | Very Reliable operating conditions |
| 2 LED’s on | -90dBm | Strong signal | Very Reliable operating conditions |
| 1 LED on | -100dBm | Good signal | Reliable operating conditions |
Noise Strength Indicator
If more than 1 led is “ON” without a valid transmission, this indicates that there is noise on the frequency selected. Change the 3-way dipswitch on the receiver module to select a different frequency. Following is a table with the Dipswitch settings and the corresponding frequencies.
| Frequency | 1 | 2 | 3 |
|---|---|---|---|
| 151.600 MHz | On | On | On |
| 152.375 MHz | Off | On | On |
| 151.775 MHz | On | Off | On |
| 151.400 MHz | Off | Off | On |
| 151.175MHz | On | On | Off |
| 151.025 MHz | Off | On | Off |
| 150.900 MHz | On | Off | Off |
| 150.825 MHz | Off | Off | Off |
Technical Data
| Supply Voltage | 240Volts AC Mains (110-120VAC available on request) |
|---|---|
| Current Consumption | 5.1 mA standby |
| Receiving Frequency | 151.6MHz (8 selectable frequencies. See table above) |
| Operating Temperature Range | -5 to 50°C |
| Sensitivity | Better than 0.5uV (For relay to activate) |
| Type of Demodulation | Narrow-Bandwidth Frequency Modulation (FM) |
| Connection | Supply, Antenna & Outputs – pluggable type terminal blocks |
| Output | Change over relay output, rated at 16 Amps of resistive load and up to |
8 Amps of inductive load.
Antenna| 50Ω, 151MHz Antenna, Elsema ANT151M for maximum performance
A piece of approximately 1metre wire can be used for short range applications
Dimensions| 165 x 70 x 35mm
Mounting Hole Size| 3.97mm or 5/32”
Weight| 188g
Useable Transmitters| All FMT151 series (with correct setting on the two way
dip switch) refer to the table above.
Useable operating range| Up to 5000 metres, depending on installation and type
of antenna used. Recommended Antenna is Elsema ANT151M
Products in the Range
| | |
---|---|---|---
FMR15101
1-Channel| FMR15102
2-Channel| FMR15101240
1- Channel 240VAC Supply| FMR15102240
2- Channel 240VAC Supply
| 
| |
FMR15104
4-Channel| FMR15104240
4- Channel 240VAC Supply| FMR15108
8-Channel| FMR1510812R
8-Channel, 12V Supply
| | |
FMR1510824R
8-Channel, 24V Supply| | |
Block Diagram
Elsema Pty Ltd
31 Tarlington Place, Smithfield
NSW 2164
Ph: 02 9609 4668
Website: www.elsema.com
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