XR-4: 4-Channel Mid-range Receiver

The Model XR-4 4-Channel Mid-range Receiver is designed for use in various wireless remote control applications. When the Model XR-4 receiver detects a signal from its companion transmitter, it will verify the digital code, activate the correct output channel, and trigger the remote device connected to the receiver.

The XR-4 receiver has full supervision capabilities. If the status option is selected, the receiver expects hourly status signals from its transmitter. If these signals cease, the receiver will indicate trouble by activating its status output after four hours. Contact supervision allows the receiver’s outputs to follow the transmitter’s inputs, each output staying activated as long as each transmitter input is activated. Alternately, an auto-restore option can be selected in the transmitter, causing a momentary receiver output each time any transmitter input is activated. If the transmitter sends a low battery signal, the receiver’s low battery output will activate.

Power for the XR-4 receiver can come from an external 12 VDC power supply (Linear Model T-1224DC) or from a 12-volt battery. A diode protects the unit from reverse power polarity. The XR-4 draws about 30 mA standby, and about 190 mA when all outputs are active. The receiver outputs provide isolated N/O and N/C relay contacts for each channel capable of switching a maximum of 1 Amp @ 32 VDC each. The low battery and status outputs are solid state and are capable of switching up to 50 mA @ 20 VDC to ground.

Two antennas (sold separately) are available for the XR-4. The Model ANT-1A is a 7-inch rubber duck antenna for short range applications (less than 1 mile). The ANT-1A is supplied with a CON-180A (straight) connector to attach the antenna to the receiver. For a right angle antenna mounting, use a CON-90A right-angle connector with the CON-180A. The Model ANT-2 is a 3-foot whip antenna for use in long range or difficult installations where more range from the XR-4 is required. A common 9-foot 1/4 wave CB whip antenna can also be used with the XR-4 for maximum range.

Two 8-position switches set the unit’s system code. This code must be matched in the XR-4’s transmitter(s). There are 65,536 different system codes possible. The 4-position option switch selects the status supervision option for each channel.

The receiver is housed in a rugged weather-resistant metal enclosure with a sturdy SO-239 antenna connector and a water-tight wiring strain relief bushing. Two indicators are visible through a window on the case. The green power indicator lights when the receiver has power. During radio reception, the red RF indicator lights. Two internal test points are provided for signal strength and audio monitoring.


  • Up to 10 miles of line-of-sight range (with XT-1 and XT-4)
  • Up to two miles of line-of-sight with handheld devices
  • Superheterodyne receiver technology
  • Power on and RF activity indicators
  • Form ”C” relay output
  • Optional RF supervision
  • Weather-resistant case
  • Antenna (ANT-1A or ANT-2) not included
  • Power: 12 VDC
  • Codes: Over 64,000
  • RF frequency: 27.255 MHz
  • Dimensions: 4.25″ W x 6.25″ H x 2.5″ D

Order number: SSR00069

Operating Voltage: 12 to 15 VDC
Operating Current: (See specific transmitter type)
Operating Temperature: -4° to +140° F (-20° to +60° C)
Receiver Type: Superheterodyne
Sensitivity: -118 dB (minimum)
Selectivity: 6 KHz
Carrier Frequency: 27,255 MHz
Number of Codes: 65,536
Code Setting Method: DIP switch programming
Data Input: Alarm, restore, status, and low battery
Status Exception Time Frame: Four hours
Antenna Impedance: 50 Ohms (not supplied: see ANT-1, ANT-2)
System code select: two, eight-position DIP switches (16 bits, 65,536 codes)
Status elect: one DIP switch position, ON-enabled, OFF-disabled
Channel select: two DIP switch positions, select channel 1, 2, 3, or 4
Dimensions: 4.25″ W x 6.25″ H x 2.5″ D (108 x 159 x 64 mm)
Weight: 1 lb. (0.454 Kg)
Current Drain: 25 mA, typical standby 185 mA alarm @ 12 VDC
Outputs: Alarm – form “C” relay per channel (XR-1, XR-4)
Status exception – one open collector output per receiver
Low Battery – one open collector output per receiver
Audio and signal strength test points
Accessories for use with the XR-4
Model Description
ANT-1A ANT-1A: 7-inch Mid-range Antenna
ANT-2 3-foot Mid-range Antenna
CON-90A Right Angle Antenna Connector
T-1224DC Power Supply 12 VDC @ 2 Amps
Models compatible with the XR-4
Model Description
XT-1 1-Channel Stationary Mid-range Transmitter
XT-4 4-Channel Stationary Mid-range Transmitter
XT-1H 1-Channel Handheld Mid-range Transmitter
XT-2H 2-Channel Handheld Mid-range Transmitter
XT-4H 4-Channel Handheld Mid-range Transmitter

Installation Manual