Installation; Power Connections - Valcom V-9939A Instruction Manual

Valcom one-way amplified speaker assemblies
(type determined by job requirements)
Power Supply (type determined by style and
quantity of speakers - Consult the Valcom
One-Way Paging VSP for more information)
2. By using the V-9939A with a V-1101A One
Zone One-way Page Adaptor or a V-9937
One Zone Page Port Adaptor you may
automatically disconnect the speakers of one
zone from a multi-zone page adaptor and
allow microphone access to that zone.
These configurations will allow the
microphone to override the telephone
access.
NOTE: These will work only on a zone of
ONE-WAY paging.
When using the V-9939A to override an existing zone
of telephone accessed one-way paging, the following
will be required:
1 V-9939A Microphone Adaptor
1-Microphone (push to talk)
1 V-1101A One Zone Page Adaptor
OR
1 V-9937 One Zone Page Port Adaptor
An existing Valcom one-way page system
Other configurations are possible. Contact Technical
Support {(540) 427-3900} with questions on specific
applications.
Microphone Requirements
A standard high impedance (50,000 ohms) or low
impedance balanced (600 ohms) microphone may be
used. The microphone will be required to provide a
dry contact closure (push to talk) for page access.

INSTALLATION

These instructions cover the installation procedures
for the Valcom V-9939A and any associated Valcom
equipment. Please consult practices for other
manufacturer's equipment if any other equipment is
being used. Refer to Figure 2 for location of screw
connections. Refer to Figure 3 for screw connection
designations.
The following sections contain step-by-step
instructions for wiring the V-9939A and associated
Valcom equipment. Each instruction is preceded by a
line. Place a check on the appropriate line as the
instruction is completed. The instructions also
include tests along the way to verify connections have
been made correctly. If these steps are followed
exactly, installation of your Valcom system will go
smoothly and quickly. If the results of a test do not
correspond with what is shown, DO NOT PROCEED
UNTIL THE PROBLEM HAS BEEN
CORRECTED.
NOTE: During initial system setup it is
recommended that all volume controls be set 1/2 turn
clockwise.
Mounting
Using two #6 3/4" wood screws, mount the unit
in a convenient location near the microphone
location
NOTE: DO NOT locate the V-9939A closer than
18" to a power supply or any equipment that
generates electrical noise.

Power Connections

___ 1. Unplug power supply.
___ 2. Connect –24 Vdc "A" battery (may be
referred to as "-" or "talk battery") from
power supply to one of the PWR terminals
on the V-9939A.
___3. Connect –24 Vdc Ground ("A" ground,
"+" or "talk" ground) from power supply to
the other power terminal. This GND should
be properly grounded to an earth ground to
alleviate hum on the system.
2 947939A