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INTRODUCTION
These instructions provide identification, installation,
connection, operation, and maintenance information
for the V-9939A, Microphone Adaptor.
The V-9939A is a Microphone Adaptor designed to
be used with Valcom paging equipment.
SPECIFICATIONS
Purpose
Provides microphone access to Valcom one-way
amplified speaker assemblies.
Applications
Allows local paging access to a zone of one-way
paging speakers.
Allows paging access to stand alone systems.
Refer to Figure 1 for a block diagram of a typical
installation.
Features
600 ohms balanced and 50,000 ohm inputs
Works with most microphones with push to talk
switches
Built in microphone preamplifier
Mounts at microphone location
Provides a set of form "C" contacts
May be connected to a selected zone of a multi-
zone paging system
Screw terminals for all connections
Capacity
Each V-9939A may be connected to one zone of a
paging system.
Dimensions/Weight
7.1"H x 4.7"W x 2.1"D
(18.03 cm H x 11.94 cm W x 5.33 cm D)
0.7lbs. (32kg)
V-9939A
MICROPHONE ADAPTOR
1
Power Requirements
–21.5 to –26 Vdc filtered "A" Battery, 40 ma. max
Environment
Temperature:
Humidity:
Nominal Specifications
Input impedance
Output impedance
Output level
SYSTEM DESIGN
Configuration
There are two basic ways the V-9939A Microphone
adaptor may be used:
1.
It may be used with a V-1094A and Valcom
one-way amplified speaker assemblies as a
stand alone paging system.
When using the V-9939A for access to a stand alone
paging system, the following will be required:
1 V-9939A Microphone Adaptor
1-Microphone (push to talk)
1 V-1094A Booster Control
VSP-V-9939A
Issue 8
0 to 50 Degrees C
0 to 85% non-precipitating
600 ohms balanced/
50,000 ohms unbalanced
600 ohms
-10dbm nominal
947939A
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Table of Contents
Related Manuals for Valcom V-9939A
Summary of Contents for Valcom V-9939A
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Page 1: Specifications
Capacity stand alone paging system. Each V-9939A may be connected to one zone of a paging system. When using the V-9939A for access to a stand alone paging system, the following will be required:... -
Page 2: Installation
Mounting Using two #6 3/4" wood screws, mount the unit in a convenient location near the microphone When using the V-9939A to override an existing zone location of telephone accessed one-way paging, the following will be required: NOTE: DO NOT locate the V-9939A closer than 18"... -
Page 3: Wiring Instructions
Mount the V-1094A near the V-9939A or at ___1. Stand alone page system: Proceed to Figure the main frame. ___2. Connect Tip of the V-9939A to Tip of the ___2. Override an individual zone using a V-1094A input. V-1101A: Proceed to Figure 5. - Page 4 MICROPHONE SWITCH AUDIO GND STRAP V-9939A V-1094A PWR MC RING R IN -24 R OUT ONE-WAY AMPLIFIED T IN T OUT PWR LZ1 SW SPEAKER ASSEMBLIES AB AG BB BG -24VDC POWER SUPPLY FIGURE 4 - STAND ALONE PAGE SYSTEM...
- Page 5 ___ 3. Connect Tip of the V-9939A to pin 2 of the control unit for the zone to be overridden. V-9937. ___11. Connect the green/red of the V-1101A to the ___ 4.
- Page 6 Speak through the microphone and adjust to talk switch to the V-9939A SW the screwdriver adjustable volume terminal. controls on the V-9939A and output 1 of ___d. Connect the other side of the push to talk the V-9937 to the desired page level.
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Page 7: Operation
TABLE 1 - TROUBLESHOOTING CHART SYMPTOM SOLUTION 1. No relay operation in V-9939A Check for –24 VDC at V-9939A across the PWR terminals. Verify when microphone talk button is connection from microphone to terminals SW and GND OUT (refer to pressed. - Page 8 This warranty is in lieu of and excludes all other warranties, expressed or implied, and in no event shall Valcom, Inc. be liable for any anticipated profits, consequential damages, loss of time or other losses incurred by the buyer in connection with the purchase, operation, or use of the product.