Xantech 791-44 Users Manual

INSTALLATION INSTRUCTIONS

791-44

AMPLIFIED CONNECTING BLOCK

The Model 791-44 is an Amplified Connecting Block that permits up to 10 single or 10 dual emitters (or any
combination thereof) to be driven directly at high or low power levels. Up to 100 emitter ports may be driven
using 790-00 passive connecting blocks 'daisy chained' from the HIGH IR OUT port. The 791-44 interfaces
all Xantech IR Receivers and Keypads to the emitters along with a power supply in an infrared repeater
system. It can also serve to provide emitter expansion at the output port of other Xantech devices, such
as the 590 Programmable Controller, the 710 Fone Link™ and the 796 Zone Expander. A floating terminal
is provided for "STATUS" line connections.

EMITTERS

791- 44

AMPLIFIED

GND

STATUS

IR IN

CONNECTING BLOCK

®

12 VDC

Talk-back LED

HIGH

IR

OUT

IR

RCVR

Fig. 1 Model 791-44

+12 VDC

Modules & Connecting Blocks

SPECIFICATIONS

• 4-screw plug-in terminal for +12VDC, GND, STATUS, & IR IN.

• Quick connect "IR RCVR" input (3.5mm mini stereo jack).

• Red talk-back LED flashes with IR input signal.

• Ten EMITTER output ports, parallel driven (3.5mm mini mono jacks).

• HIGH IR OUT port for emitter expansion (3.5mm mini mono jack). See Fig. 5.

• Use of included jumpers connect either a 100 or a 470-Ohm resistor in series with each emitter jack for
high or low power operation.

• 282/283/284/286 series of Emitters may be used in any combination.

• Power requirements: 12 volts DC. Uses 781RG or 782-00 Power Supplies (see item 3 below).

• 2.1 mm coaxial power jack.

• Dimensions: 6" W x 2-1/4" D x 15/16" H

INSTALLATION

Fig. 2, next page, illustrates a typical installation of a 791-44 in an IR repeater system. A variety of Xantech
IR Receivers and a keypad are shown. When configuring a system, please keep the following items in mind:

1. More IR receivers may be wired in parallel, in the same manner as shown, up to a maximum of twelve.

More than twelve is not recommended because IR noise picked up by the many IR receivers may
cause erratic operation and reduce remote control range.

NOTE: This restriction does not apply to Xantech Smart Pads. These may be added virtually without
limit, provided power supply requirements are taken into consideration. See item 3.

791-44



1

2. Be sure to connect the +12V, Output and Gnd of each IR receiver and keypad to the respective

+12VDC, IR IN and GND of the connecting block as shown.

3. Power Supply Requirements. You may combine many Xantech keypads, IR receivers, controllers and

emitters in a system. Having sufficient power supply voltage and current available is critical for proper
operation. Be sure to take the following factors into consideration:

a) The maximum current for proper operation from a 781RG Power Supply is 120 mA (milliamps).
b) The maximum current from a 782-00 Power Supply is 1000 mA.
c) Most IR receivers draw 2 mA without signal and 10 mA with signal (check specs. on actual model).
d) Each 730 Smart Pad draws 7 mA without signal and 65 mA with signal.
e) Each Smart Pad

draws 85 mA with or without signal.

2 or 3

f) Each emitter draws 3 mA in low power mode and 12 mA in high power mode.
g) Add 10 mA for each 794 or 797 Interface module used,

if they are powered from the 791-44.

h) When using combinations of these devices, add up the currents as shown in the following example.

Then choose the power supply or supplies. Do not exceed their maximum current capabilities as
noted above!

+12V

IR OUT

GND

ROOM 3

XANTECH

+12V

IR OUT

GND

+12V

IR OUT

See
Item 4
below

780-10

J-BOX RECEIVER

780-10

J-Box

IR Receiver

Smart
Pad

ST

GND

7 Foot 3-Conductor
Cable with Quick
Connect Stereo Mini Plug

2 or 3

ROOM 1

490-00 Series

Micro Link™
IR Receivers

3-Wire
Cable

+12V

GND

Red
Stripe

IR OUT

3-Wire
Cable

+12V

GND

ROOM 2

480-00

Dinky Link™

IR Receiver

Red
Stripe

IR OUT

For example, the power supply needed for the system
shown in Fig. 2 is arrived at as follows:

a) The no signal current for the five IR receivers is

5 x 2 = 10 mA.

b) Assuming a Smart Pad

keypad, the with or

2 or 3

without signal current is = 85 mA.

Note: Since only one IR source can operate at a
time, the lower current IR receivers (and 730
keypads if used) do not need to have their "with
signal" currents included.

c) The current for one 794 Interface module

V

+12V
GND

IR OUT

490-30 Series

Micro Link™
IR Receivers

GS

RCVR

IR

Connecting Block

OUT

CAUTION:

See text, item 5.

781RG

To 120 VAC
(unswitched)

IR

RCVR

IR

12 VDC

GND

+12 VDC

Power

Supply

Makita
Drape Controller

MAIN ROOM, EQUIPMENT CABINET, ETC.

Fig. 2 A typical 791-44 System

CB12

Connecting Block

OUT

X

PWR

791-44

Amplified

HIGH

+12 VDC
GND
STATUS
IR IN

AMPLIFIED

CONNECTING BLOCK

®

794-60

Universal

Interface

791-44

ROOM 4

7 Foot Quick
Connect Cable

EMITTERS

+12V

XANTECH

+12V

GND2

12345678910

GND1

ON

1 2 3 4 5 6 7 8 910

1 (ON)

0 (OFF)

OUT

IR IN

794

UNIVERSAL INTERFACE

SENDER/

EMITTER

Satellite Receiver

Laser Disc

AV Receiver

CD Changer

Cassette DecK

Dimmer Control

282M

Mouse Emitter

= 10 mA.

d) The current for six emitters is 6 x 3 = 18 mA (in the low power mode. Also the 286 dual emitters

count as only one, since they are in series).

291-10

Hidden Link™
IR Receiver

282M

Mouse Emitter

VCR

282M

Emitter

283M

Blink-IR™

283M

Blink-IR™

286M

Dual Blink-IR™

286M

Dual Blink-IR™

2



791-44