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EF Link Supervised Transceiver Wireless Relay

£832.50 (inc VAT: £999.00)

Low Stock

SKU: EF-Link Category: Brand:


The EF Link Supervised Transceiver Wireless Relay is an easy-to-install transmitter/receiver for remote alerting and status monitoring with 4 inputs and 4 relay outputs.

This unit is best suited to security alarm panels and fire alarm panels and can be configured as either a master unit or a node unit. In a single network up to 15 ‘node’ units can be connected to a ‘master’ unit.

The 4 dry contact input zones each have a corresponding relay output plus a further relay for radio link failure identification. The front panel of the unit has a number of LEDs to indicate the status of the Wireless Relay. Active relays, configuration status (i.e. master or node), radio signal jams/fails and the signal strength of incoming transmissions are all indicated.

With minimal effort users can quickly create a UHF linked wireless radio network using the plug-and-play capabilities of the EF Link Supervised Transceiver Wireless Relay. User configurable settings are selectable via switches within the unit itself meaning there’s no need for a PC interface. Settings that can be adjusted in this way are:

  • normally open/closed default conditon for each input zone
  • relays set as either latching, change of state or self-reset

EF-Link Wireless Networking Protocol is a designed for a low-data rate over short distance communication. This device also employs acknowledge-back and LBT (list before talk) techniques for rubustness and reliability.


  • Can be supplied with no factory programming necessary
  • Quick and easy installation
  • 4 volt-free inputs and 4 relay outputs configured by DIP switches
  • LINK FAIL and SIGNAL JAM indicators
  • LINK FAIL output relay
  • LBT (listen before talk) for reliable communications
  • Can be powered from 12V or 24V
  • Up to 16 units per network (15 x nodes, 1 x master)
  • 0.5W maximum output power



  • Input Voltage: 10-30V DC
  • Consumption:
    • <50mA operating
    • 300mA transmit (plus 25mA per active zone)


  • Frequency Range: 458.500 – 458.650 MHz (factory programmable)
  • Channel Spacing: 12.5KHz
  • Adjacent Channel: better than 10uW at 2KHz deviation
  • Tx Baud Rate: 2400 baud
  • Power Output: 500mW max.


  • Sensitivity: -100dBm
  • Ports:
    • 4 dry contact zone inputs
    • 4 relay zone outputs
    • USB port for programming /interface function
    • DIP switches for system configuration
  • Dimensions (mm): 184 x 138 x 45 max.
  • Radio Standards: ETS EN300 220
  • Notified Body No: 0891
  • EMC Standards: ETS EN301 489

Additional information

Weight 0.5 kg