INSTALLATION INSTRUCTIONS
291-455
455 kHz HIDDEN LINK INFRARED RECEIVER
IR Receivers & Modems
The 291-455, Fig. 1, is a single-frequency version of
the 291-00 series IR receivers. It is designed specifi-
291-455
455 kHz IR Receiver
291-455
455 kHz IR Receiver
cally to accept the 455 kHz IR carrier frequency used
on certain manufacturer's A/V products, such as Bang
& Olufsen and Kenwood (some models).
NOTE:
•
The 291-455 will not pass IR commands
from remote controls with any other IR carrier
frequency!
• If you use lower frequency IR controlled compo-
PWR
OUT
Connecting Block
Front View
RCVR
CB12
Side View
IR
VGS
nents in the same system with the 291-455, you
must use standard Xantech IR receivers, such as the 291-10 (side-by-side with the 291-455, if necessary),
to repeat the lower frequency commands. Refer to Fig. 3.
• The 291-455 must be used in conjunction with the Model MS455, a 455 kHz IR Modulator, to complete
the system.
• The attractive case of the 291P permits cabinet or shelf-top locations when wall-mounting an IR receiver
is not practical.
PRINCIPLE OF OPERATION
The 291-455 down-converts the 455 kHz carrier to 40 kHz so that the IR signal can be passed along a
standard 3-conductor cable to the equipment location. At the equipment location, the 3-conductor cable
connects to the MS455, a 455 kHz IR Modulator. This device accepts the 40 kHz signal and "up-converts"
it back to 455 kHz. It is then transmitted to the 455 kHz controlled product via a special shielded emitter
(supplied with the MS455).
FEATURES AND SPECIFICATIONS
• IR carrier reception frequency: 455 kHz.
• IR carrier repeat frequency: 40 kHz.
• IR reception range: 30 feet on axis (actual range depends on levels of IR or EM interference).
• Nominal reception angle: ± 45° off axis.
• Red talkback LED tests system for correct wiring as well as indicating infrared reception.
• Connections: Captive 7' cable with 3.5mm stereo mini plug. CB12 Connecting Block included for
connection ease.
NOTE:
The 291-455 will not operate in 2-wire Phantom Power mode.
• Requires the use of the MS455 Modulator and a 283SH shielded emitter to complete the repeater system.
• Recommended cable for use between the CB12 and the MS455: 3-conductor/24 gauge solid or stranded
wire up to 200', 22 gauge up to 600', 20 gauge up to 2000' and 18 gauge up to 5000' (unshielded OK).
• Power Consumption: 12 volts DC @ 15 mA. (Powered from the MS455).
• 781C-00 Power Supply (not included) powers up to six 291-455's with one MS455.
• Dimensions: 3-1/4" W x 1" H x 2" D.
1
INSTALLATION
A basic installation, using one 291-455 in a typical 455 kHz IR controlled A/V receiver system located behind
closed cabinet doors, is shown in Fig. 2.
• Make the 3-conductor, power supply & emitter connections to the MS455 Modulator as shown in Fig. 2.
• For 3-conductor cable recommendations, see Features and Specifications section.
• If needed, additional 291-455's, installed in other rooms, may be connected in parallel at the MS455
terminals (twelve 291-455's max). Use a 782-00 power supply when using more than six 291-455's.
• Fig. 2 shows a VCR and an LD player connected by serial links to the A/V receiver. This assumes that
the VCR and the LD player are the same brand as the A/V receiver and that the serial link is compatible
between the three components. Refer to the manufacturer of the units for details.
• The 283SH Emitter wire is shielded between the plug and the junction point. This minimizes RF
interference. To keep interference effects at a minimum,
do not extend the length of any part of this
emitter lead assembly.
291-455
455 kHz IR Receiver
Do not
plug in
a power supply
in this case.
X
OUT
PWR
IR
RCVR
V
GS
CB12
Connecting
Block
+12V
GND
OUT
3-Conductor Cable
(unshielded OK)
TV
MONITOR
7 Foot Quick
Connect Cable
Fig. 2 Basic 291-455/MS455 Repeater System
A/V Leads
to Monitor
455 kHz
IR Remote
455 kHz IR Controlled
AV Receiver, Preamp, etc.
Serial
Links
283SH
Emitter
MODEL MS455
MODEL MS455
455 kHz IR MODULATOR
+12V
ON
GND
1 2 3 4
GND
S1S2
INPUT
CABINET WITH CLOSED DOORS, ETC.
S3 S4
SYLMAR, CA Made in USA
40 kHz
OUTPUT
455 kHz
OUTPUT
+12V
VCR
LD Player
Shielded
Lead
781C-00
Power Supply
120 V AC
(Unswitched)
A more advanced system is shown in Fig. 3. A 291-455 and a variety of other Xantech IR receivers and
a key pad are connected to an MS455 and a 789-44 Connecting Block. It accomplishes the following:
1. Allows IR control of both a 455 kHz operated A/V Receiver and 40 kHz operated components from the
main room. This is accomplished by using both high frequency (291-455) and low frequency (29110 or 291-80) IR receivers in the same room.
2. The additional rooms have control over only the 40 kHz units, unless
down converted commands are
taught to learning devices. Refer to "PROGRAMMING DOWN-CONVERTED COMMANDS" in the
MS455 Installation Instructions.
3. The down converted commands, for example, could be programmed into the SMART PAD shown in
Fig. 3, room 3. Also, a learning remote, such as the Xantech URC-1, could be programmed in like
manner. In this way, standard Xantech Key Pads, IR Receivers (such as the 490-00 shown in room
2, Fig. 3) and Controllers can be used in the system, where desired.
4. NOTE: 291-455's could also be used in any of the remote rooms (wired in parallel with the low
frequency IR receiver and key pad), if control of the 455 kHz A/V Receiver using the 455 kHz remote
is desired in those rooms.
5. The use of a 789-44 Connecting Block in the system allows more 40 kHz units to be controlled than
would be possible by using only the 40 kHz output jack on the MS455.
2
291-455
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