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FMR15108
Eight-Channel 151MHz Receiver with Open Collector Outputs
Features
• Wide supply connection – 11.0 to 28.0 Volts AC/DC
• Highly sensitive receiver input stage.
• Outputs can be operated simultaneously.
• Crystal controlled for high stability and performance.
• Uses micro-controller technology that can be re-programmed to suit unique applications.
• Momentary, flip-flop and latching output modes is user-selectable.
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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Description
FMR15108 can be used in noisy environment and is least affected by electrical interference. This makes FMR15108 an ideal choice for use in heavy industrial environment.
Case
The FMR15108 can be supplied without a case, this allows the receiver to be integrated according to your needs.
The C160 case and QM100 mounting bracket can be used to enclose the FMR15108 receiver. The receiver with a case is known as a FMR15108E.
Different Modes for each Output
Modes are user selectable from the 4-way dip switch, shown below.
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.
Products in the Range
Technical Data
Supply Voltage |
11.0 to 28.0 Volts AC/DC.
Can use Elsema 12-volt AC power pack (PP12)
Supply lines should be less than 3 metres long to comply with radio frequency authorities |
Current Consumption |
10mA Standby at 12VDC, 30mA if all outputs “On”
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Receiver Type |
Single Conversion Superheterodyne |
Receiving Frequency |
151.6MHz (8 selectable frequencies within 150.900 - 151.600MHz with 100KHz spacing avaliable). |
Oscillation System |
VCO with 10ppm crystal controlled reference oscillator |
Operating Temperature Range |
-5 to 50°C |
IF Frequency |
10.7MHz |
Selectivity |
Better than -6dB at ±25kHz |
Type of Demodulation |
Narrow-Bandwidth Frequency Modulation (FM) |
Occupied Bandwidth |
25kHz at -20dB |
| Outputs |
Eight Open Collectors (See chart for Collector Currents)
Chart indicates that eight outputs can be ON simultaneously with each output collector current being 125mA. Outputs can hold 50 Volts in “Off” state. |
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 |
90 X 70 X 15 mm |
Mounting Hole Size |
3.97mm or 5/32” |
Weight |
83g |
| Useable Transmitters |
FMT15101E, FMT15102E, FMT15104E, FMT15108E (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
Application Notes
Care should be taken with the solid-state outputs that they are protected from inductive loads. This is done by connecting diodes across your DC inductive load.
Inductive loads such as DC relays must be clamped with a diode across the relay coil. If this is not done the spikes generated by the DC relay will lock-up the receiver. When a lock-up occurs you will need to remove the power and re-connect it.
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