Zenith HealthView H20E50DT Installation And Operating Manual, Warranty page 10

Pillow Speaker Hook Up
Connect a pillow speaker to the HealthView TV
1
Locate the Pillow Speaker Output jack on the back
of the HealthView TV.
2
Connect an accessory pillow speaker or wired
remote control unit to this 6-pin jack.
3
Select PILLOW SPKR on the rear panel of the
HealthView TV.
Use a pillow speaker by Curbell, Model A-16455-02 or
other UL recognized pendant control bearing the warning:
"Risk of fire if used in oxygen enriched atmosphere.
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 technology
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
TV
SPKR
ANTENNA
CABLE
PILLOW
Video Speaker
SPKR
In Out
M.P.I.
PILLOW SPEAKER
Audio
In
TV Back Panel
(Expanded View)
4
5
3
6
1
2
(MALE
PLUG)
CHAN
UP
206-3491-O