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GLR2702
2-Channel 27MHz Gigalink™ Receiver
Features
• Wide supply connection – 11.0 to 28.0 Volts AC/DC
• Highly sensitive receiver input stage. When used with GLT27…. series transmitters and an ANT27L antenna, an operating range of 350 metres (980 ft) is possible.
• Two relay outputs. Both outputs can be operated simultaneously.
• Crystal controlled for high stability and performance.
• Dual Conversion to reduce interference.
• Uses micro-controller technology that can be re-programmed to suit unique applications.
• Momentary, flip-flop and latching output modes is user selectable.
Applications
• automatic gates, security, timer controlled outputs and simple on/off functions etc |
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 Download Datasheet
Programming Instructions
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Description
The GIGALINK™ is an advanced Remote Control technology available in the world today. GIGALINK™ is an invention that has revolutionised the entire Remote Control technology including Elsema's earlier version of FMT- … and FMR- … series. The GLR.... series state-of-the-art invention brings a new dimension in the world of Remote Control technology in domestic, commercial and industrial applications.
The innovative microcontroller technology replaces the traditional dip switch coding which eliminates any possible code grabbing. Special features such as over four billion code combinations, ability to program any number of transmitters to any of the receiver outputs, three user selectable modes, dual conversion superhet and operational over a wide voltage range all adds up to the most advanced and secure Remote Control available.
Four billion codes
The user can easily change the code on all the channels. Momentary joining the two CC pins on the receiver board sets all channels to one random code. One of 4,294,967,296 possibilities is selected.
Code Programming - Single
During single code programming, the 2-way dip switch selects the channel to be programmed. The table below shows the setting to select a different channel.
Dip Switch |
Channel |
1 |
2 |
Output Relay |
OFF |
OFF |
1 |
ON |
OFF |
2 |
After selecting the correct channel, the receiver channel is ready to be single code programmed.
Follow the steps outlined in the receivers instruction sheet titled single code programming to complete the code programming.
Code Programming - Channelised
If all the receiver channels are to be programmed onto a multi channel transmitter, then follow the steps outlined in the receivers instruction sheet titled channelised code programming. This does not require the user to set the 2-way dip switch since all receiver channels will be programmed sequentially onto the transmitters channels.
The receiver power must be connected when single or channelised code programming.
When programming is completed and the GIGALINK cable is removed from the multi channel receiver-coding socket, the 2-way dip switch is used to select different output modes. This is described below.
Different Modes for the Output
Modes are user selectable from the 2-way dipswitch. Dipswitch 1 corresponds to relay channel 1 and dipswitch 2 corresponds to relay channel 2.
| Momentary Mode |
If the dipswitch is “off” the relay will be in momentary mode. |
| Flipflop Mode |
If the dipswitch is “on” the relay will be in flipflop mode. |
| 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 right of the 2-way dipswitch. This will enable corresponding relays to latch. |
Dual Conversion Superhet
The multi channel receiver is crystal controlled using dual conversion. Dual conversion is where the received frequency is mixed twice, using a crystal at both mixing stages. This results in less interference, enabling the receiver to operate in noisy industrial applications, improves operating performance, which allows the receiver to pass EMC and stringent radio regulations around the world.
AC/DC Supply and Antenna
AC/DC power supply and antenna is connected via a screw-type terminal block. Do not connect the supply to the 2.5-mm coding socket since connection may damage the microcontroller.
Unique Code System
The microcontroller EEPROM allows large volume users to have a unique code. This enables Elsema to offer everyone "your own" radio control.
Case
The two-channel receiver is supplied without a case, this allows the receiver to be integrated according to your needs. Elsema has available a Quick Mount bracket which enables easy mounting to walls, roof etc.
Products in the Range
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GLR2701
Single Channel Receiver with Relay Output |
GLR2701240
Single Channel 240V Receiver with Relay Output |
GLR2702
2-Channel Receiver with 2 Relay Outputs |
GLR270312
3-Channel 12V Receiver with 3 Relay Outputs |
GLR270324
3-Channel 24V Receiver with 3 Relay Outputs |
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GLR270412
4-Channel 12V Receiver with 4 Relay Outputs |
GLR270424
4-Channel 24V Receiver with 4 Relay Outputs |
GLR2708
8-Channel Receiver with 8 Open Collector Output |
GLR270812R
8-Channel 12V Receiver with 8 Relay Outputs |
GLR270824R
8-Channel 24V Receiver with 8 Relay Outputs |
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GLR2701SS
1-Channel Receiver with 1 Open Collector Output |
GLR2702SS
2-Channel Receiver with 2 Open Collector Output |
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Technical Data
| Supply Voltage |
11.0 to 28 VDC and 10.0 to 28 VAC.
Can use Elsema AC power pack (12PP1000 or 24PP).
Supply lines should be less than 3 metres long to comply with radio frequency authorities. |
| Current Consumption |
10mA standby at 12 VDC Supply
63mA if relay “ON” at 12 VDC Supply |
| Receiver Type |
Dual Conversion Superheterodyne |
| Receiving Freq |
27.195MHz (Other frequencies available: 27.045, 27.145 & 27.455MHz. NB. 27.455MHz is available for Europe Only) |
| Type of Crystal Used |
10.245MHz, Fundamental, 20pf, 30ppm
16.495MHz, Fundamental, 20pf, 30ppm |
| Operating Temperature Range |
-5 to 50°C |
| 1st IF Freq |
10.7MHz |
| 2nd IF Freq |
455kHz |
| Selectivity |
-6dB at ±5kHz
-20dB at ±6kHz |
| Image Rejection |
At 26.285MHz better than -60dB |
| Sensitivity |
1uV (for output to activate) |
| Type of Demodulation |
Narrow-bandwidth Frequency Modulation (FM) |
| Occupied Bandwidth |
±5kHz |
| Decoding System |
Microcontroller based 96-bit word |
| Code Combinations |
4,294,967,296 |
| Output |
Two change over relay outputs, rated at 5 Amps/240 Volts |
| Connections |
Supply, Antenna & Outputs: Screw type terminal block |
| Antenna |
Elsema’s ANT27MHz series antennas or piece of approximately 300 mm long wire for short range applications. |
| Dimensions |
96 x 70 x 20mm |
| Mounting Hole Size |
3.97mm or 5/32" |
| Weight |
83g |
| Microcontroller |
Can be re-programmed to suit your customised needs |
| Useable Transmitters |
All Elsema Type 27MHz GLT-... series |
Block Diagram
Sh terminal is used for antenna's using coaxial cables. The shield (braid) on the coaxial cable should be connected to the Sh terminal while the core of the coaxial cable is connected to the A terminal.
GLR2702 12/24 VDC Application 
GLR2702 240/110 VAC Application
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