2
291-455
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.
Fig. 2
Basic 291-455/MS455 Repeater System
MODEL MS455
455 kHz IR MODULATOR
INPUT
GND
GND
+12V
+12V
455 kHz
OUTPUT
S1 S2
40 kHz
OUTPUT
1 2 3 4
ON
S3 S4
SYLMAR, CA Made in USA
MODEL MS455
OUT
V
IR
RCVR
PWR
G
S
283SH
Emitter
120 V AC
(Unswitched)
781C-00
Power Supply
455 kHz
IR Remote
3-Conductor Cable
(unshielded OK)
Shielded
Lead
A/V Leads
to Monitor
Serial
Links
CABINET WITH CLOSED DOORS, ETC.
291-455
455 kHz IR Receiver
GND
OUT
+12V
7 Foot Quick
Connect Cable
CB12
Connecting
Block
X
Do not
plug in
a power supply
in this case.
TV
MONITOR
455 kHz IR Controlled
AV Receiver, Preamp, etc.
VCR
LD Player
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 (291-
10 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.
