• Range up to 3km
• Over 4 billion code combinations
• High reliability, low current consumption, great flexibility
• Durable alloy enclosure available upto 8 channels.
Applications
• 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
Programming Instructions
To download programming instructions, select your receiver type from the menu below.
*In order to download the correct programming instructions, please determine the correct receiver type installed.
These 1Watt 27MHz transmitters are designed to give a controlled range of up to 3 kilometres (LOS). The controlled operation can be either electronic or electrical operated device when used with the GLR-…. series of receivers.
The transmitter uses a specially programmed MICRO-CONTROLLER, which ensures the highest reliability, low current consumption on sleep mode (10uA) and greater flexibility. The GLT271208NC is a transmitter without a case, while the GLT271201E, GLT271202E, GLT271204E, GLT271208E transmitters are enclosed in an alloy metal case, which has an external supply terminals, channel input terminals and a SO239 antenna socket provided.
The transmitter modes are user selectable by simply setting the 2-Way dip-switch on the transmitter board. Below is a summary of the modes.
Transmitter Modes
Off Delay 2 to 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 the trimpot of the transmitter board. If another channel is activated during the "off delay" period the new channel 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 channel is activated and the supply is connected.
Off Delay 1 to 10 minutes.
Same as mode 1 except the "off delay" is user selectable between 1 to 10 minutes.
Continuous transmission.
Transmitter will transmit continuously, if at least one channel is activated and supply is connected. A transmission limit of five minutes is used to comply with local radio regulations.
To activate a receiver longer than 5 minutes, use a delay off feature in the receiver (GLR2701) and transmitter. The delay off feature in the receiver needs to be set more than the transmitter. This ensures that the transmitter keeps resetting the off delay in the receiver. Refer to Application Note
1.5 to 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 another channel is activated and supply is connected, transmitter will emit one new burst.
Sleep mode (10 uA) is activated when all 8-channels are OFF, this applies to all four modes.
Products in the Range
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GLT271201E
1-Channel, Enclosed
GLT271202E
2-Channel, Enclosed
GLT271204E
4-Channel, Enclosed
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GLT271208E
8-Channel, Enclosed
GLT271208NC
8-Channel No Case
Technical Data
Power Source
11-13.6VDC (for constant RF Output), screw type terminal. Absolute max 14VDC
Current Consumption
Nominal 300mA at 12VDC supply (transmitting)
Nominal 12mA on standby
Less than 10uA on Sleep Mode (only when no channel are activate otherwise it is on standby)
Operating Freq
27.195MHz (Other frequencies available: 27.045, 27.145 & 27.455MHz. NB. 27.455MHz is available for Europe Only)
Carrier Freq Tolerance
Crystal controlled 30 parts per million
Operating Temperature Range
-0 to 50°C
RF Power Output
1Watt, into 50 ohms SO239 socket @ 13.6VDC
Antenna
SO239 Socket is provided. Optimum performance use Elsema ANT27L antenna
Type of Emission
Narrow-bandwidth Frequency Modulation (5K00F1D)
Freq Deviation Limiting
1600 - 1900Hz non-return to zero
Modulation Freq
1.8kHz (0.56 ms/bit) (15% tolerance)
Spurious Transmission
-13dBm
Necessary Bandwidth
±2.5kHz
Digital Coding System
Microcontroller based 96-bit word
Code Combination
4,294,967,296
Dimension
90 X 56 X 15 mm (No case)
140 X 60 X 34 mm (with metal case).
Mounting Hole Size
4.00 mm or 5/32 " (No case)
4.76 mm or 3/16"(with metal case).
Mounting Hole Spacing
Length 76 mm (3.00")
Width 45 mm (1.77") (No case)
Length 125 mm (4.92")
Width 45 mm (1.77") (with metal case).
Weight
60 grams (No case)
250 grams
Useable Receivers
GLR... series
Useable Operating Range
Up to 3000m, depending on installation and type of antenna used. Recommended Antenna is Elsema ANT27M or ANT27L
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