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FMT-212E (Obsolete)
12 Volt 1/2 Watt 27MHz Transmitter
Features
•500mW Transmitter with current consumption of 300mA
• Long range – up to 2km
• Specially programmed micro-controller
• Durable alloy metal case
Application
• Pump Control
• Long distance panic button
• On/Off applications in agricultural devices
• Security alarm
• Basic Telemetry eg. Water level indication
Care should be taken not to transmit without an antenna |
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 Download Datasheet
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Description
The FMT-212E has a 1/2-watt transmission with a current consumption of 600mA .
The FMT-212E is designed to give a controlled range of up to 2km. The controlled operation can be any electronic or electrical operated device when used with the FMR-… series of receivers.
The transmitter uses a specially programmed micro-controller , which ensures the highest reliability, low sleep mode current (10uA) consumption and greater flexibility.
The FMT-212 transmitter is the PCB assembly only, while the FMT-212E transmitter is enclosed in an alloy metal case.
External supply connection and SO239 antenna socket is provided with the transmitter.
The transmitter modes are user selectable by simply setting the 2-Way dip-switch on the transmitter board.
Transmitter Modes
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Off Delay 2 – 62 seconds
Transmitter will transmit a 1.5 second transmission burst and then stop for the "off delay" time selected. The "off delay" time is user selectable between 2 to 62 seconds by adjusting trimpot on the transmitter board. If the code changes during the "off delay" period the new code will be transmitted immediately. When the "off delay" time lapses, transmitter will transmit another burst. The transmitter will cycle (transmission and off delay) indefinitely, if at least one code switch from the 12-Way code switch is ON and supply is connected. |
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Off Delay 1 – 10 minutes
Same as mode 1 except the "off delay" is user selectable between 1 to 10 minutes. |
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Continues Transmission
Transmitter will transmit continuously, if at least one code switch from the 12-Way code switch is ON and supply is connected. The transmitter will transmit as long as the supply is connected. |
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1.5 – 10 seconds one burst transmission
Transmitter will transmit one burst and then go to standby or sleep mode. Adjusting the trimpot will vary the burst length. When the code is changed and supply is connected, transmitter will emit one new burst of the new code. |
| Sleep mode (10 uA) is activated when all 12 code switches are OFF; this applies to all four modes. |
Products in the Range
Click image to enlarge |
Click image to enlarge
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FMT-212E
1-Channel, Enclosed |
FMT-212
1-Channel |
Technical Data
Power Supply |
11 to 13.6 VDC (for constant RF-Output), screw type terminal. Absolute maximum 14VDC. |
Current Consumption |
Nominal 500mA at 12VDC supply (Transmitting)
Nominal 12mA on standby
Less than 10uA on sleep mode (only when all code switches are OFF otherwise it is on standby) |
Operating Frequency |
27.145MHz (Other frequencies available on 27.045, 27.195 and 27.455 MHz. The 27.455 frequency is not available for Australia ). |
Carrier Frequency Tolerance |
Crystal controlled, 30 parts per million (0 to 50°C). |
R.F. Output Power |
500mW into 50 ohms SO239 socket at 13.6VDC. |
Antenna |
SO239 socket is provided. Optimum performance use Elsema ANT27L antenna |
Type Of Emission |
Narrow-band-width Frequency Modulation (5K00F1D) |
Frequency Deviation Limiting |
1200-1600Hz non-return to zero |
Modulation Frequency |
1 kHz (0.96 ms/bit) (15% tolerance) |
Spurious Transmission |
At least -20dB/Carrier |
Necessary Band Width |
±2.5 kHz |
Digital Coding System |
On-board 12-way code switch
Code switch is inserted into an IC socket. This is for the easy removal of the code switch. Elsema's coding cable can be inserted into the IC socket, which enables the user to have 4096 digital channels. |
Dimension |
140 X 60 X 34 mm |
Mounting Hole Size |
4.76 mm or 3/16" |
Mounting Hole Spacing |
Length 125 mm (4.92")
Width 45 mm (1.77") |
Weight |
225 grams |
Useable Operating Range |
Up to 2000 metres, depending on installation and type of antenna used. Recommended Antenna is Elsema ANT27L |
Compatible Receivers |
All Elsema type FMR-... series |
Wiring Diagram
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