Step 2: Transmitter Power
Wiring
WARNING! BE SURE AC POWER IS TURNED
Step 2:
OFF AT THE OUTLET WHILE INSTALLING THE
POWER TRANSFORMER. A METAL COVER
PLATE COULD SLIP AND SHORT ACROSS THE
TRANSFORMER PLUG DURING INSTALLATION,
CREATING A SHOCK HAZARD.
SHORTING THE POWER SUPPLY TERMINALS
WILL BLOW A NON-REPLACEABLE INTERNAL
FUSE, DESTROYING THE POWER SUPPLY
UNIT1
The TX3 transmitter is supplied with a low-voltage
wall transformer power supply. The transmitter must
be located within 6 feet of an AC wall outlet or the
24 Volt power cord must be extended. Additional
two-conductor, 18 ga. zipcord is included with the
transmitter. If the transmitter power supply can be
located near the modulator, use the combination
cable to carry the modulation signal and low-voltage
power to the transmitter. The zipcord can be
separated from the combination cable if the power
supply is located near the transmitter.
DO NOT CONNECT THE POWER SUPPLY TO
AC POWER YET!!!
Step 1:
Determine the length of zipcord needed to
reach from the transmitter to the AC wall
outlet where the power supply will be
plugged in. Cut the zipcord to length.
Zipcord length must not exceed 200 feet.
Strip the ends and install the crimp-on
spade terminals supplied. Connect one end
of the zipcord to the transmitter power
input screw terminals. Connect the other
end to the power supply screw terminals.
Make sure to.switch AC power to the
outlet OFF at the fuse or circuit breaker.
Remove the wallplate cover screw and
plug the transformer into the outlet.
Secure the transformer with the cover plate
screw. Turn the AC power back on at the
breaker box AFTER the transformer is
installed.
The indicator light on the front panel of
the TX3 will not glow unless there is a
95 kHz carrier. This auto shut-off feature
preserves the life of the IR LED’s and
reduces power consumption when the
transmitter is not in use. The wall
transformer can be plugged into a switched
outlet that turns on when the other sound
equipment is turned on. This system is
designed for Class 2, low-voltage wiring.
Always follow local electrical codes when
doing low voltage wiring.
Modulation Out
(75 Ohm)
Modulation In
(75 Ohm)
24 VAC Power In,
50-60 Hz, 35W
Omnimount
25-STXMP
For Wall Mount
Omnimount
25-STXMP
For Ceiling Mount
Infrared Transmitter
Model WIR TX3
Williams Sound
®
Helping People Hear
Made in U.S.A.
Williams Sound Corp., Minneapolis, Minnesota, USA
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
WARNING: TO REDUCE THE RISK OF FIRE OR
ELECTRIC SHOCK DO NOT EXPOSE THIS
EQUIPMENT TO RAIN OR MOISTURE.
Power Supply Wiring:
Use NEC, Class 2 Wiring,
18 ga. Min
200 ft. Max. Length (18 ga.)
Modulation Signal Wiring:
Use RG59U Coax,
1000 ft. Max. Length
Internal Fuse:
1.25 A, 250V, 3AG
Note: It is normal for this unit
to feel warm while it is in
operation.
Baseband Output Connection
Connect to MOD 1 here
using RG-59 cable.
Power Connection
Plug in Power Supply
Fig. 10: TX3 Wiring Detail
Williams Sound
®
Helping People Hear
9
