Zenith HealthView H20C50DT Installation And Operating Manual, Warranty page 10

Pillow Speaker Hook Up
Connect a pillow speaker to the HealthView TV
Locate the Pillow Speaker Output jack on the back of
1
the HealthView TV.
Connect an accessory pillow speaker or wired remote
2
control unit to this 6-pin jack.
Select PILLOW SPKR on the rear panel of the
3
HealthView TV.
Use a pillow speaker by Curbell, Model A-16455-02 or
other UL recognized pendant control bearing the warn-
ing: "Risk of fire if used in oxygen enriched atmos-
phere. Keep pendant control away from oxygen
equipment."
Controlling the TV with Serial Data
The TV is capable of being controlled by a single wire,
serial data signal. This is a Zenith patented technolo-
gy and is being implemented by certain brands of
"smart" pillow speakers, such as Curbell's "GEN-II"
models.
Pillow Speaker Interface
This connector furnishes three control lines and an
audio output. A patient-pendant remote control, or
entertainment audio and nurse call system may be
connected here. All lines are isolated from the AC
power line and earth ground. (Opto-isolators isolate
the control lines, and a transformer isolates the
audio. There are no relays or inductive components in
the control lines.)
4
5
6 3
1
2
Pin no. Purpose
1 External TV On/Off switch
2 (not used)
3 External Channel Up switch or Data in
4 Common connection for control, data,
and audio output.
Impedance to earth ground is a 10-meg resistor
in parallel with a 1100 pf capacitor.
5 Isolated audio output. Nominal 14-ohm source
impedance with short circuit protection. Intended
for a pillow speaker with a low-impedance pad-type
volume control.
6 External Channel Down switch
P A G E 1 0
1 TV ON/OFF
2 OPEN
3
CHAN UP/DATA IN
4 COMMON
5 AUDIO OUT
6 CHAN DOWN
TV
Pillow speaker not included with
HealthView TV.
SPKR.
VOLUME CONTROL
CHAN
TV
DOWN
ON/OFF
Controlling the TV with mechanical switches
Pin 4 (common) is momentarily connected to pin 1, 3, or 6 via
push-action switches to control On/Off and Channel Up/Down.
These pins are at +13 volts DC (when measured from pin 4) with
the switches open. Current draw is 8 mA when a switch is
closed. (This operation is identical to previous Zenith models
using the 5-Wire Interface except that only +7 volts DC was
supplied and current draw was only 2.5 mA.)
TV back
ANTENNA
CABLE
TV
M.P.I.
PILLOW SPEAKER SPKR
PILLOW
SPKR
TV back panel
(expanded view)
4
5
3
6
1
2
(MALE
PLUG)
CHAN
UP
206-3491-O