1. PRODUCT DESCRIPTION
2. OPEN RECEIVER
WARNING: THIS
PRODUCT SHOULD NOT
BE USED IN LIFE
Linear’s Xtended Range FM receivers and transmitters are 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.
XR-4
SAFETY APPLICATIONS.
FCC Rules allow
unlicensed high-power
transmissions at or near
the operating frequency
of this product which
may interfere with, or
even disable, normal
operation of this radio
device.
XTENDED RANGE
FOUR CHANNEL
SUPERVISED
STATIONARY
RECEIVER
For Use With Linear’s
XR Series Xtended
Range Transmitters
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.
REMOVE FOUR
CASE SCREWS AND
SLIDE OUT CIRCUIT
BOARD
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.
REFERENCE
CARD FITS IN
1ST SLOT
Two antennas (sold separately) are available for the XR-4. The Model ANT-1A is an 8-inch
“rubber duck” antenna for short range applications (less than 1 mile). The ANT-1A requires
a CON-180A (straight) connector to mate the antenna to the transmitter. For a right angle
antenna, use the CON-180A plus the CON-90A.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.
Installation
Instructions
BOARD FITS IN
3RD SLOT UP
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.
END CAP STAYS
ATTACHED TO
THE CIRCUIT
BOARD
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 reception, the red RF indicator lights. Two internal test points are provided for signal
strength and audio monitoring.
CASE SCREWS
(760) 438-7000 • FAX (760) 438-7043
USA & Canada (800) 421-1587 & (800) 392-0123
Toll Free FAX (800) 468-1340
3. COMPONENT LOCATIONS
4. INSTALLATION TIPS
5. MOUNT RECEIVER CASE
If using the ANT-1A antenna: For best range mount the XT/XR unit to a metal plate with a
minimum size of 12" x 12". The ANT-1A antenna should extend above the mounting plate
and be free of obstructions. If the ANT-1A antenna cannot be mounted in the open, consider
using an extension coaxial cable with PL-259 connectors to move the antenna’s location.
3-FOOT
ANT-2
ANTENNA
ANTENNA
CONNECTOR
(HIDDEN)
USE ANT-1A ANTENNA FOR
SHORT RANGE APPLICATIONS
(LESS THAN 1 MILE)
TEST POINTS
The XT/XR series of radios operate in the 27 MHz Citizens Band (CB) and may use any CB
antennas or CB antenna accessories. Antennas, PL-259 extension cables and other adapters
are available at Radio Shack® or other electronics stores.
SIGNAL
LEVEL
RIGHT ANGLE
CONNECTOR
SYSTEM CODE
SWITCHES
UNIVERSAL
(CON-90A)
MOUNTING BRACKET
8-INCH
18-FOOT CABLE
STRAIGHT-THRU
ANT-1A
AUDIO
OUTPUT
CONNECTOR
(CON-180A)
ANTENNA
USE ANT-2 ANTENNA FOR MAXIMUM
RANGE OR DIFFICULT APPLICATIONS
MOUNT UNIT WITH
TWO BOTTOM SCREWS
(DON'T INSTALL TOP
SCREWS UNTIL WIRING
IS COMPLETE)
SWITCH "B"
SWITCH "A"
GROUND
GOOD INSTALLATION
BAD INSTALLATION
LINE-OF-SIGHT
BETWEEN THE
TRANSMITTER AND
RECEIVER ANTENNAS
WILL PROVIDE THE
BEST RANGE
STATUS
SWITCH
RF SIGNAL
INDICATOR
(RED)
ANTENNAS ARE MOUNTED
VERTICALLY, ON HIGH POINTS
OF BUILDINGS
TRANSMITTING THROUGH
STRUCTURES, METAL AND
GEOGRAPHIC OBSTACLES WILL
REDUCE RADIO RANGE
POWER
INDICATOR
(GREEN)
MOUNT ANTENNA AS HIGH AS POSSIBLE
GOOD ANTENNAS NEED GOOD GROUNDS
OK
METAL ROOF
UNIT SHOULD BE
FAIR
MOUNTED IN SHELTERED
LOCATION WITH ACCESS
TO ANTENNA CO-AX AND
POWER/SIGNAL WIRES
3'
POOR
9 FEET
AT LEAST 9 FEET
ABOVE GROUND IS
RECOMMENDED
WHEN MOUNTING ON
THE SIDE OF A
STRUCTURE, USE A
MINIMUM OF A 3-FOOT
SPACER TO DISTANCE
THE ANTENNA FROM
THE STRUCTURE
IDEALLY, A GROUND
PLANE WITH A RADIUS
OF NINE FEET MINIMUM
IS DESIRED
POWER & OUTPUT
TERMINAL BLOCK
ANTENNA LOCATION IS
OF PRIMARY CONCERN
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