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GLR2708/REX16
27MHz 16-Channel Combo Receiver
Features
• 8 Channels
• 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.
• Eight 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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GLR2708 |
REX16 |
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 Download DatasheetProgramming 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.
The microcontroller has a built-in channelised code programming system. Channelised code programming programs all the channels, from the sixteen channel receiver, to the sixteen channel transmitter. That is, channel one on the transmitter activates channel one on the receiver and alternatively. To channelise code program a sixteen channel transmitter read the GLR2708/REX16 receiver setup instructions.
Mode setting
Each output has momentary setting.
AC/DC Supply and Antenna
AC/DC power supply and antenna is connected to the 3-way terminal block. Do not connect the supply to the 2.5-mm coding socket since connection may damage the microcontroller.
Channels
The sixteen channels are solid state outputs using the 2 X ULN2803 Integrated Circuit. This IC is inserted to a socket that enables the user to easily change the output stage in case of a damaged output. The ULN2803 IC is available from Elsema. Simultaneous reception of multi-channels is not possible with this receiver.
Dual Crystal Control
The GLR2708/REX16 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, improving operating performance, which allows the receiver to pass EMC and stringent radio regulations around the world.
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 GLR2708/REX16 is supplied without a case. This allows the receiver to be integrated according to your needs.
Technical Data
| Supply Voltage |
10.0 to 28 V AC/DC.
Absolute maximum DC 40 Volts.
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 |
11mA standby, 15mA if one output is “On” |
| Receiver Type |
Dual Conversion Superheterodyne |
| Receiving Freq |
27.195MHz (Other freq available on 27.045, 27.145, & 27.455MHz. The 27.455 freq is not available for Australia) |
| 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 |
Less than ±5kHz |
| Decoding System |
Microcontroller based 96-bit word |
| Code Combinations |
4,294,967,296 |
| Output |
Open collector output sinks 400mA. Outputs can hold 50 Volts in “Off” state. Simultaneous reception of multi-channels is not possible with this receiver. |
| Output Mode |
Momentary. During normal operation 3-way dip switch should be off. |
| Connections |
Supply and Antenna:
3-way screw type terminal block.
16 Outputs: 17-way Screw type terminal block (16 open collectors plus ground) |
| Antenna |
50 ohms, 27MHz CB-Antenna or approximately 1m long & 1mm thick piece of wire |
| Dimensions |
GLR2708: 96 x 70 x 15mm
REX16: 96 x 70 x 22mm |
| Mounting Hole Size |
3.97mm or 5/32" |
| Mounting Hole Spacing |
Length 85mm
Width 60mm |
| Weight |
GLR2708: 63g
REX16: 52g |
| Useable Transmitters |
GLT2708NC/TEX16 |
| Useable Operating Range |
Up to 350m with proper 50 ohms, 27MHz CB-Antenna. Up to 200m with 1m long antenna wire. Antenna wire should be extended and away from metal. Ranges asume line-of-sight operation. |
Block Diagram
Remove the ULN2803 from the GLR2708 and connect Elsema's 16W-ribbon cable. Channel one on the GLR2708 needs to be connected to channel one on the REX16. See note A in above 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 inductive load or using Elsema's line filter, LF24.
Inductive loads such as relays must be clamped with a diode across the relay coil. If this is not done the spikes generated by the relay will lock-up the receiver. When a lock-up occurs you will need to remove the power and re-connected it.
Only one channel can be received. Simultaneous reception of multi-channels is not possible with this receiver.
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