2
789-44D
• For example, 1 keypad and several IR receivers could be used with one 781C-00 Power Supply. 12
keypads and 8 (or more) receivers could be used with one 782-00 Power Supply.
• Also, two or three 781C-00 power supplies could be wired in parallel for intermediate numbers of keypads
and receivers.
• CAUTION: The 781C-00 power supply is unregulated and therefore can be paralleled. However,
never
parallel regulated power supplies, such as the 782-00.
• To use additional 781C-00's in parallel, plug the first one into the 12 VDC jack on the 789-44D. Then, on
the additional one(s), simply cut off the 2.1 mm coaxial plug, strip the lead ends and connect them to the
+12V and GND terminals at the 4-terminal input plug. Be sure to observe correct polarity! (White striped
lead is +).
• CAUTION: Do not use unregulated 12V power supply adapters from other manufacturers. These may
deliver excessive voltage to the IR receivers and cause them to “latch-up”. When this occurs, the
“talkback” LEDs and the Blink IR Emitters (if used) will stay on continuously!
4. For clarity, connections in Fig. 2 are shown going to a 3-conductor bus in a "daisy chain" fashion. In
an actual installation, however, it is recommended that 4-conductor "home-runs" be pulled from each
room to the 789-44D Connecting Block in the main room. The home-runs maintain higher power
supply voltage to each IR receiver and keypad, and the extra 4th wire can be used for "STATUS" if
desired (refer to Fig. 3).
5. The "IR RCVR" jack on the 789-44D (see Fig. 1) allows the 490-30 (and other Xantech IR Receivers
with a cable having a 3.5 mm stereo mini plug), to be plugged directly into the 789-44D. You can do
this when the 789-44D Connecting Block is within reach of the 7-foot cable, such as when installing
the 490-30 in a cabinet where the controlled equipment is behind closed doors.
CAUTION: Plug only Xantech IR Receivers equipped with a stereo mini plug into the IR
Receiver jack.
Do not plug in emitters or other devices; to do so will destroy emitters and
damage power supplies!
OUT
V
IR
RCVR
PWR
GS
789-44D
Connecting
Block
Satellite Receiver
AV Receiver
VCR
MAIN ROOM, EQUIPMENT CABINET, ETC.
To 120 V AC
(Unswitched;
see NOTE 1)
782-00
Power
Supply
282M
Emitter
283M
Blink IR™
7 Foot 3-Conductor
Cable with Quick
Connect Stereo
Mini Plug
490-30
Series
Micro Link™
IR Receivers
291-10
Hidden Link™
IR Receiver
GND
OUT
+12V
ROOM 3
780-10
J-Box
IR Receiver
490-00
Series
Micro Link™
IR Receivers
3-Wire
Cable
OUT
GND
+12V
480-00
Dinky Link™
IR Receiver
Red
Stripe
Smart
Pad™
GND
OUT
+12V
ROOM 2
ROOM 1
ROOM 4
GND
OUT
+12V
286M
Dual Blink IR™
(to other
controlled
devices)
3-Wire
Cable
OUT
GND
+12V
Red
Stripe
+12V
OUTPUT
GND
780-10
J-BOX RECEIVER
XANTECH CORPORA
TION
SYLMAR, CA
91342
CAUTION:
See text, item 5.
7 Foot Quick
Connect Cable
CB12
Connecting
Block
282M
Emitter
+12V
GND
IR IN
Fig. 2
A typical 789-44D System
