Linear D-2C, D-2C/K, D-2R, D-2R/K, D-4C Code Setting And Installation Instructions

LINEAR’S MULTI-CHANNEL RECEIVERS

Linear manufactures several multi-channel receivers for
use in security systems and remote switching functions
requiring more than one wireless zone or output. Using one
multi-channel receiver instead of several single-channel
receivers enables the installer to cut installation costs and
improve system performance by eliminating RF
interference problems present in multiple-receiver
installations.

THREE DIFFERENT TYPES OF OUTPUTS

Linear’s two- and four-channel receivers are available in
three different types of output configurations: two
solid-state and one relay. Certain alarm control panels and
communicators require a positive voltage to trigger. Other
controls, especially those with end-of-line (EOL) resistors,
can be triggered with a short-to-common output. All
controls and communicators can be triggered with a dry
contact relay output (normally open or normally closed).

“C” TYPE VOLTAGE OUTPUT

D-4C and D-4C/K

The output wires on the “C” type voltage output receivers
supply a positive trigger voltage to the connected device
when the receiver detects a properly coded digital RF
signal from a Linear transmitter. Each output channel wire
will switch from an open state to +9 volts DC when
activated. The voltage outputs are current limited to 10 mA
maximum at 9 VDC, 40 mA maximum into a short. See
Figure 1 for a hook-up example.

“D” TYPE SHORT-TO-COMMON OUTPUT

D-4D and D-4D/K

The outputs of a “D” type short-to-common receiver are
similar to a normally open switch that has one side
connected to common or circuit ground. When any receiver
channel is activated, the corresponding output wire will
switch from an open state to 0 volts (common or circuit
ground). The short-to-common outputs are current limited
to a maximum of 40 mA. This is enough current to trigger
most control panels with EOL resistors or drive a small
relay. If driving a relay, be sure to connect a clamping diode
across the relay coil. See Figure 2 for a hook-up example.

✶

NOTE: On all “C” and “D” type receivers, the common (-)
of the receiver must be connected to the common (-) of the
control panel or communicator (see Figures 1 & 2).

“R” TYPE RELAY OUTPUT

D-2R, D-2R/K, D-4R AND D-4R/K

The outputs of the “R” type receivers are isolated dry relay
contacts. Dry contacts indicate that the switching contacts
are isolated from the receiver power supply. The receivers
provide normally open and normally closed contacts for
each channel. The current rating of the relay outputs is 1
amp at 32 volts maximum. Do not exceed this rating. See
Figure 3. for a hook-up example.

RECEIVER CODE SETTING

✶

CAUTION: Transmitters and receivers should be re-coded
by the installer prior to installation. Do not leave units set
to the factory code.

Linear’s two- and four-channel receivers contain an
eight-key digital coding switch recessed in the back cover
of each unit.

The switch keys are numbered 1-8 (see Figure 4). Keys
#1 and #2 are not used when coding the receiver. These
keys are not connected, and their position doesn’t matter.
To set a code, select a random pattern for keys 3-8. Set
the code keys with a pointed object other than a pencil or
pen. In the example shown in Figure 4, keys 4, 6 and 7 are
set to

ON

, keys 1, 2, 3, 5 and 8 are set to

OFF

.

The receiver code keys 3-8 must match exactly with code
keys 3-8 in all Linear transmitters used with that receiver.

TRANSMITTER CODE SETTING

TWO- AND FOUR-CHANNEL TRANSMITTERS

To code a D-4 four-channel portable transmitter to any two­or four-channel receiver, simply match keys 3 through 8 in
the transmitter to keys 3 through 8 in the receiver.
To code D-22B, D-22C, or D-22D two-channel portable
transmitters to a two-channel receiver, match keys 3
through 8 in the transmitter to keys 3 through 8 in the
receiver and turn transmitter key #2 to the

OFF

position.

✶

IMPORTANT: When using the above two-channel
transmitters with any two-channel receiver, key #2 in the
transmitter must be

OFF.

To code D-22B, D-22C, or D-22D two-channel portable
transmitters to a four-channel receiver, match keys 3 through
8 in the transmitter to keys 3 through 8 in the receiver. If key
#2 in the transmitter is

OFF,

the transmitter will activate

receiver channels one and two. If key #2 in the transmitter is

ON,

the transmitter will activate channels three and four.

SINGLE-CHANNEL TRANSMITTERS

To code any Linear single-channel transmitter to a two- or
four-channel receiver, set keys 3 through 8 in the transmitter
to match keys 3 through 8 in the receiver. Keys one and two

in the transmitter determine which receiver channel will
activate. Refer to Figures 5, 6, 7 and 8 for the settings of keys

one and two in the transmitter for selecting channels 1, 2, 3
and 4 respectively.

✶

NOTE: On multi-channel receivers, only one receiver
channel can be activated at a time!

Codesetting Instructions for D-2&4 Rcvrs
Linear P/N 106226 B
Size: 17.0" W x 5.5" H
Material: 70 Lb. White Coated
Ink: PMS 285 (Blue) & Black
1 of 2

Codesetting Instructions for D-2&4 Rcvrs
Linear P/N 106226 B
Size: 17.0" W x 5.5" H
Material: 70 Lb. White Coated
Ink: PMS 285 (Blue) & Black
1 of 2

+ 12 VDC AUX OUTPUT
COMMON NEGATIVE

COMMON LOOP RETURN
ZONE 2 INPUT

TYPICAL CONTROL PANEL

ANTENNA

"C" TYPE

RECEIVER

CH 1CH 2

RED

BLACK

VOLTAGE OUTPUT HOOK-UP

ZONE 1 INPUT

+9 WHEN TRIGGERED

ZONES PROGRAMMED
FOR VOLTAGE TRIGGER

Figure 1. Typical "C" Type Wiring

+ 12 VDC AUX OUTPUT
COMMON NEGATIVE

COMMON LOOP RETURN
ZONE 2 INPUT

TYPICAL CONTROL PANEL

ANTENNA

CH 1CH 2

RED

BLACK

ZONE 1 INPUT

"D" TYPE

RECEIVER

SHORT-TO-COMMON HOOK-UP

ZONES PROGRAMMED
FOR E.O.L. RESISTORS

COMMON WHEN

TRIGGERED

Figure 2. Typical "D" Type Wiring

+ 12 VDC AUX OUTPUT
COMMON NEGATIVE

COMMON LOOP RETURN

TYPICAL CONTROL PANEL

ANTENNA

CH 1CH 2

RED

BLACK

"R" TYPE

RECEIVER

RELAY OUTPUT HOOK-UP

ZONES PROGRAMMED
FOR E.O.L. RESISTORS

N/O
COM

N/C

COM

ZONE 1 INPUT

ZONE 2 INPUT

Figure 3. Typical "R" Type Wiring

5

8

7

6

1

4

3

2

O

F

F

O

N

Figure 4.
Example

Coding Switch

O
N

O
F
F

1 2 3 4 5 6 7 8

Figure 5.

Transmitter Setting

for Channel One

O
N

O
F
F

1 2 3 4 5 6 7 8

Figure 6.

Transmitter Setting

for Channel Two

O
N

O
F
F

1 2 3 4 5 6 7 8

Figure 7.

Transmitter Setting

for Channel Three

O
N

O
F
F

1 2 3 4 5 6 7 8

Figure 8.

Transmitter Setting

for Channel Four

INSTALLATION

The receiver should be mounted on the wall above or next
to the control panel. Generally, the higher the receiver is
mounted above ground level, the better the radio range
should be.
Use Table 1 as a guide and follow these steps to connect
the receiver:
STEP 1 Connect receiver negative COMMON (-) to the

negative terminal on the 12-volt, 24-hour output
from the control panel.

STEP 2 Connect receiver positive (+) to the positive

terminal on the 12-volt, 24-hour output from the
control panel.

STEP 3 Connect the outputs to the zone input terminals

on the control panel (see Figures 1, 2, and 3).

STEP 4 If the control panel uses end-of-line resistors,

connect them across the receiver output for
normally open loops, or in series with the receiver
outputs for normally closed loops.

CHECKOUT AND TEST

After installing the receiver, the system should be tested.
To test the receiver, perform the following steps:
STEP 1 Apply power to the control panel. Be sure the

control panel is disarmed or in a “test” mode.

STEP 2 Trigger each of the system’s transmitters, one at

a time. Receiver activation indicates that the
transmitters are operating properly and that the
digital codes are correctly matched. Verify that
the correct receiver channel and control panel
loop is violated.

STEP 3 With portable transmitters, operate them from

various locations. This will help to locate possible
null areas where structural steel, and/or certain

obstacles may interfere with transmission.
If the transmitter fails to activate the receiver, first check
the coding switches to see that the switch keys in the
transmitter and receiver are properly matched. Next, check
the battery and replace it if it is weak. Although transmitter
batteries should last for a year with normal use, it is good
practice to install new transmitter batteries every six
months.

✶

Electronic products are no better than the inspection and
maintenance they receive over time. Therefore, Linear
recommends installers should instruct their customers to
test their equipment regularly, at least once a week.

SPECIFICATIONS

CODING TECHNIQUE

Pulse width A-1 modulation at 250
bits-per-second. Four 8-bit words
are required for activation

NUMBER OF CODES

64 system codes

RF CARRIER

303.875 MHz for U.S.
318 Mhz for Canada

RADIATED OUTPUT

Complies with FCC Part 15 and
D.O.C. Rules

SELECTIVITY

5 MHz at 5 mV input

POWER

REQUIREMENTS

“C” and “D” Type:
11 to 24 VDC or 12 to 16 VAC
Standby and operating current 15
mA typical
“R” Type:
11 to 24 VDC or 12-16 VAC
Standby current 15 mA, operating
60 mA typical

OUTPUT RATING

“C” Type: 9 VDC out @ 40 mA
maximum
“D” Type: 40 mA maximum
short-to-common
“R” Type: Form C, 1 Amp @ 32
VDC maximum

OPERATING

TEMPERATURE

-40 to +140° F
(-40 to +60° C)

SIZE

“C” and “D” Type: 4.9 x 3.8 x 1.3
inches (125 x 97 x 33 mm)
“R” Type: 4.9 x 4.2 x 1.3 inches
(125 x 107 x 33 mm)

LINEAR LIMITED WARRANTY

This Linear product is warranted against defects in material and workm anship for twelve
(12) months. The Warranty Expiration Date is labeled on the product.

This warranty

extend s on ly t o who lesal e cus tomer s

who buy direct from Linear or through Linear’s

normal distribution channels.

Linear does not warrant this product to

consumers.

Consumers should inquire from their selling dealer as to the nature of the

dealer’s warranty, if any.

There are no obligations or l iabilities on the part of

Linear corporation for consequential damages a rising out of or in connection with
use or performance of this product or other indirect dama ge s with re spect to loss
of property, revenue, or profit, or cost of removal, installation, or reinstallation.

All
implied warranties, including implied warranties for merchantability and implied
warranties for fitness, are valid only until Warranty Expiration Date as labeled on the
product.

This Linear Corporation Warranty is in lieu of all other warranties

expre s s or implied.

For warranty service on Linear equipment return product, at sender’s expense to:

U.S.A. Canada
Linear Corporation Linear Canada Inc.
2350 Camino Vida Roble,Ste.A 673 Consortium Court
Carlsbad, CA 92009 London, Ontario, Canada N6E 2S8
Attention: Repairs Department Attention: Repairs Department
Ph# [phone] Ph# [phone]

IMPORTANT !!!

Linear radio controls provide a reliable communications link and fill an
important need in portable wireless signalling. However, there are some
limitations which must be observed.

☞

For U.S. installations only: The radios are required to comply with FCC
Rules and Regulations as Part 15 devices. As such, they have limited
transmitter power and therefore limited range.

☞

Receivers may be blocked by radio signals that occur on or near their
operating frequencies, regardless of code settings.

☞

A receiver cannot respond to more than one transmitted signal at a
time.

☞

Infrequently used radio links should be tested regularly to protect
against undetected interference or fault.

☞

A general knowledge of radio and its vagaries should be gained prior
to acting as a wholesale distributor or dealer, and these facts should
be communicated to the ultimate users.

Copyright  1990 Linear Corporation 106226 B

2 & 4 Channel

Digital Security Receivers

D-2C, D-2C/K, D-2R, D-2R/K, D-4C,
D-4C/K, D-4D, D-4D/K, D-4R, D-4R/K

Code Setting and

Installation Instructions

2055 Corte Del Nogal

Carlsbad, CA 92009

[phone] • [phone]

CA [phone] • FAX [phone]

Customer/Technical Service: [phone]

Codesetting Instructions for D-2&4 Rcvrs
Linear P/N 106226 B
Size: 17.0" W x 5.5" H
Material: 70 Lb. White Coated
Ink: PMS 285 (Blue) & Black
2 of 2

Codesetting Instructions for D-2&4 Rcvrs
Linear P/N 106226 B
Size: 17.0" W x 5.5" H
Material: 70 Lb. White Coated
Ink: PMS 285 (Blue) & Black
2 of 2

D-4C &

D-4D
POWER +
POWER -

CH. 1
CH. 2
CH. 3
CH. 4

RED

BLACK

YELLOW

GREEN
WHITE

BROWN

GOLD (ON WHITE PAIR)

D-2R & D-4R

N/O COMMON N/C

SILVER (ON WHITE PAIR)

BROWN 1 RED 1 ORANGE

YELLOW GREEN BLUE

VIOLET GRAY WHITE
BLACK BROWN 2 RED 2

Table 1. Installation Wiring Chart

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A NORTEK COMPANY