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FMR15102
2 Channel 151MHz Receiver
Features
• Two channel receiver with relay outputs
• Supply voltage can be AC or DC
• Low current consumption
• Built-in noise or signal strength indicator
• User can select 8 different frequencies
• Momentary, Flip Flop and Latching modes are all user selectable
• Easy code setup with dip switch settings
• Optional QM100 bracket available for easy mounting to cases or walls. C160 case is also available
Application
• Pump Control
• Long distance panic button
• On/Off applications in agricultural devices
• Security alarm
• Basic Telemetry eg. Water level indication |
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 Download Datasheet
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Description
The 151MHz receivers use dual conversion, narrow band FM which makes it ideal for industrial applications. Built into the receiver is a noise and signal strength indicator. The user selectable frequency synthesizer allows for easy installation on a frequency that is not in use, allowing optimal performance in the receiving range.
The receiver outputs are relays that are voltage free allowing the user to connect any voltage up to 240VAC with currents of 5 amps.
Modes
1. Momentary Mode
If the dipswitch is off the relay will be in momentary mode.
2. Flip Flop Mode
If the dipswitch is on the relay will be in flipflop mode.
3. Latching
If latching is required (Relay stays on until power is removed) the latching link should be inserted and soldered into the two holes to the left of the 2-way dipswitch and the respective dip switch to be on. Dip Switch 1 will put Channel 1 in latching and Dip switch 2 will put channel 2 in latching mode.
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 will be an additional dip switch depending upon the receiver type:
- Two channel receiver will have a 2 way dip switch.
This DIP switch on the right side of the 12 way dip switch denotes the channel. See table below.
Generally to use a 2 channel Tx to 2 channel Rx match all the 14 dip switch (12way + 2way just on the right side of the 12 way).
To use a 2 channel Tx to control 2 x single channel receivers, first match the 14 dip switch positions and on the receiver, 15th dip switch OFF is Ch1 and 15th dip switch ON is Ch2.
To use a 2 channel receiver with 2 x single channel transmitters, first match 14 dip switch and then the Tx with Sw15 OFF will activate the Ch1 on the receiver and the Tx with Sw15 ON will activate the Ch2 on the receiver.
FMR15102
2-Way DIP Switch & 2 Relay Output
SW13 |
SW14 |
Relay 1 |
Relay 2 |
OFF |
OFF |
Ch1 |
Ch2 |
OFF |
ON |
Ch3 |
Ch4 |
ON |
OFF |
Ch5 |
Ch6 |
ON |
ON |
Ch7 |
Ch8 |
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. The default setting is for 151.6MHz (All 3 dipswitches “ON”). Below is a table with the Dipswitch settings and the 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 |
Products in the Range
Technical Data
Supply Voltage |
11.0 - 28.0 VDC
10.0 - 28.0 VAC
Can use Elsema AC power pack (12PP1000 / 24PP)
Supply lines should be less than 3m long to comply with radio frequency authorities |
Current Consumption |
35mA Standby at 12VDC
95mA if both relay “ON” at 12VDC |
Receiver Type |
Dual Conversion Superheterodyne |
Receiving Frequency |
151.6MHz (8 selectable frequencies. See table above). |
Oscillation System |
VCO with 10ppm crystal controlled reference oscillator |
Operating Temperature Range |
-5 to 50°C |
IF Frequency |
10.7MHz |
| Sensitivity |
Better than 0.5uV (For relay to activate) |
Selectivity |
Better than -6dB at ±25kHz |
Type of Demodulation |
Narrow-Bandwidth Frequency Modulation (FM) |
Occupied Bandwidth |
25kHz at -20dB |
| Output |
Two change over relay outputs, rated at 5 Amps/240 Volts |
Connection |
Supply, Antenna & Outputs - Screw type terminal block |
Antenna |
50Ω, 151MHz Antenna, Elsema ANT151M for maximum performance
A piece of approximately 1metre wire can be used for short range applications |
Dimensions |
95 x 70 x 20mm |
Mounting Hole Size |
3.97mm or 5/32” |
Weight |
83g |
| Useable Transmitters |
All FMT151 series (with correct setting on the dip switch). See Transmitter datasheet for details. |
Useable Operating Range |
Up to 5000 metres, depending on installation and type of antenna used. Recommended Antenna is Elsema ANT151M |
Block Diagram
FMR15102 12/24 VAC/DC Application
FMR15102 110/240 VAC Application
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