FMR15104
4 Channel 151MHz Receiver

Features
• Four 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 7 different frequencies
• Momentary and Flip Flop modes are all user selectable
• Easy code setup with dip switch settings.
• Optional QM150 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

 

4 Channel receiver
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Download Datasheet

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

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 8 amps.

Modes
The four dip switches correspond to the respective relays. Switch 1 for relay output 1, switch 2 for relay output 2 and so forth.

1. Momentary Mode
If the dipswitch is off the relays will be in momentary mode.

2. Flip Flop Mode
If the dipswitch is on the relays will be in flipflop 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 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 will 1 Tx and switch 13 on will use the other Tx.

 

FMR15104                                                                                      
1-Way DIP Switch & Four Relay Outputs                           

SW13

Channel

OFF

1

OFF

2

OFF

3

OFF

4

ON

5

ON

6

ON

7

ON

8

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.

Noise Strength Indicator

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

151MHz Receiver

240VAC Receiver

2-Channel 240VAC receiver

FMR15101
1-Channel
FMR1502
2-Channel
FMR15101240
1- Channel 240VAC Supply
FMR15102240
2- Channel 240VAC Supply

4 Channel receiver

151MHz receiver with open collector Outputs

8Ch receiver with relay outputs
FMR15104
4- Channel
FMR15108
8- Channel
FMR1510812
8-Channel, 12V Supply
FMR1510824
8-Channel, 24V Supply

 

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
130mA if all relays “ON” at 12VDC

Receiver Type

Single 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 Four change over relay outputs, rated at 8 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

130 x 70 x 20mm

Mounting Hole Size

3.97mm or 5/32”

Weight

100g

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

Block Diagram

 

FMR15104 12/24 VAC/DC Application

12/24V Application

 

FMR15104 110/240 VAC Application

240VAC Application