12-84-7000 VHF/UHF Relay Output Receiver
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12-84-7000 VHF/UHF Relay Output Receiver

The 12-84-7000 is a scalable, high sensitivity paging receiver with serial connectivity and 4 controllable outputs.


Using the 12-84 Relay Receiver, devices can be controlled remotely by sending commands from a portable or fixed location paging transmitter or wide area paging network to switch relays on or off.  It is available in two versions, a VHF 12-84-7150 and a UHF 12-84-7450.

The unit receives and decodes a numeric or alphanumeric pager call.  If the received unit number matches the 12-84 unit number or group number, the relays are switched as commanded by the message.

The receiver is supplied with two clean contact relays rated at 1A 24V DC operation. LED's indicate receiver operation and the relays' status. Two additional open collector outputs are also provided.

Normally closed and normally open relay contacts are available and the relays can be individually programmed for latching or momentary operation.

The 12-84 is an economic solution for basic remote control applications where only one or two switched outputs are required.

Should a greater number of relays be required, this can be achieved using the Salcom 12-34 Relay Output Module which provides another four relays. This module can be "daisy chained" to allow any number of relays to be controlled.

Network paging messages can be monitored on a PC (using  software such as Salcom's VisualPET paging software) using an optional cable to connect the computer to the 12-84 programming connector.

  • Extremely sensitive receiver;
  • Synthesized frequency selection;
  • POCSAG message format;
  • 12 volt operation;
  • Individually programmable outputs;
  • RS232 serial output (optional cable) provides the ability to monitor network paging messages;
  • Ideal for remote switching applications - lights, pumps;
  • Capable of operation on normal POCSAG paging networks or in-house systems for remote operation applications;
  • Reverse polarity protected;
  • LED indication of correct receiver operation;
  • Relay restoration on power-up;
  • Rugged extruded aluminium case.


Technical Specification

12-84-7000 VHF/UHF Relay Output Receiver
Frequency Range 148-165MHz - VHF (Model No. 12-84-7150)
440-480MHz - UHF (Model No. 12-84-7450)
Note: 80MHz to 900MHz available on request
Frequency Selection User configurable
Note: VHF model is only adjustable by ±5MHz from (customer defined) factory preset frequency
Power Supply +13.8V typical (11 to 15 VDC range)
Power Consumption Standby: 40mA
Relays: 18mA per energised relay
Modulation FSK with NRZ data
Receiver Sensitivity Approx -124 dBm
Baud Rates 512, 1200
Message Format POCSAG
Configuration Application 12-84SE PSD
Programming Cable 12-45-0000 (RJ12 to DB9)
Can be used with a USB to RS232 DB9 Serial Adapter Cable
Serial Port 9600 , N, 8, 1; RS232
Discrete Outputs 2 Relay Contacts (1A @ 24VDc); 2 Open Collector (100mA max)
Note: Not suitable for 240VAC Connections
Connectors Serial Port (RS232) = RJ12 (6P6C)
Outputs (Relay / Open Collector) = RJ45 (8C)
Power Connector 2-way plug & socket, screw connections (supplied)
RF Connector 50Ω BNC (Product supplied with aerial)
Environmental Protection Not suitable for outdoor use and should be protected from adverse environmental conditions
Operating Temperature -10ºC to +50ºC (+14ºF to +122ºF)

Power LED (Green)

   - Slow Flashing = Normal Operation

   - Solid (up to 5s) = Receiving Data
Status LED (Red)

   - Flashing = Error Condition
Weight 180g
Enclosure Dimensions 70mm x 100mm x 30mm (WxDxH)
Enclosure Material Extruded aluminium
Colour Matt black
Type Approvals   EN 300-224-2 (RF)
EN 301 489-2 V2.1.0 (EMC)
EN 60950-1:2006 (Safety)


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