4
Additional Remote Rooms
You may add more remote rooms to the system shown in Fig. 4. Proceed as follows:
• Use one additional SR21 for each additional remote room.
• Connect the A and B terminals of each additional SR21 in parallel to the A and B terminals of the preceding
SR21 (daisy chain).
• Connect the center 4-terminal connector to the additional remote room speakers in the same manner as
shown in Fig. 4.
NOTE: Be careful not to overload the amplifiers as you add rooms. It is recommended that you use
Xantech Match Maker speaker volume controls whenever you have three or more rooms connected in
this way, to ensure correct impedance matching.
• Connect the IR IN, GNDn +12VDC terminals in parallel also and connect the IR receiver's to these same
terminals, one from each room.
• Be sure to use the higher current power supply, model 782-00 (one only).
• Finally, set the CODE SUB-GROUP (refer to page 2) on each SR21 to a different number, to avoid mutual
operation and "teach" the commands to dedicated learning remotes for each room.
NOTE: To avoid the use of dedicated remotes, you could connect each SR21 to it's own dedicated power
supply, connecting block and room IR receiver.
USING THE SR21 AS AN IR ROUTER
The SR21 can also be used as simple 2-way IR router - to switch between two satellite receivers, TV
monitors, etc. Fig. 5 is an example of how it can be used to improve the system shown in Fig. 4 so that the
IR control is automatically switched from one AM/FM receiver to the other when the speaker outputs of the
AM/FM receivers are switched.
• In this case, be sure that both SR21's are set to the same CODE SUB-GROUP! This ensures that they
switch together when the Pair or Toggle A/B commands are sent.
• Note that both operate from the same power supply.
IR CONFIRM
L+
L–
R–
R+
L+
L–
R–
R+
CODE
SUB-
GROUP
SR21
SPEAKER RELA
Y
MODULE
OFF =
A
ON = B
R+
R–
L–
L+
0
1
2 3
4
5
6
7
A
B
IR IN
CI
GND
+12VDC
IR CONFIRM
L+ L– R– R+
L+
L–
R–
R+
CODE
SUB-
GROUP
SR21
SPEAKER RELAY
MODULE
OFF = A
ON = B
R+ R– L– L+
0 1
2
3
4
5
6
7
A
B
IR IN
CI
GND
+12VDC
REMOTE ROOM
MAIN ROOM
SR21
Speaker
Relay Module
4-Conductor Inter-room
Cable (Unshielded OK)
R
L
+
–
+
–
780-80
"J" Box
IR Receiver
490-30
Micro Link™ IR Receiver
(For Main Room IR Control)
GND
IR OUT
+12V
STATUS
AM/FM Receiver #1
To Emitters
on Other
Controlled
Equipment
283M
Blink IR™
Mouse Emitter
AM/FM Receiver #2
283M
Blink IR™
White Striped
Side (+)
Second
SR21
(for IR Routing)
6015900
3.5mm-to-
stripped
ends cable
(To +12V System
Status Voltage, if desired).
To 120 V AC
(unswitched)
782-00
Power Supply
789-44
Connecting Block
PWR
+12VDC
GND
STATUS
SIGNAL
EMITTERS
IR
RCVR
789-44
CONNECTING BLOCK
®
Fig. 5
Using a 2nd SR21
For IR Routing
1-30-01
Rev.B
SR21
