Issue 1
1 947023
V-9924C
COMMON AUDIBLE RINGING UNIT
GENERAL
The Common Audible Ringing Unit provides an
audible signal over the paging system when
there is an incoming call. It is used between a
telephone system and the public address
system.
SPECIFICATIONS
Activation
• 1A2 Bell/Buzzer ICM
• PABX Station Port
• Contact Closure
Features
• Activates via ringing voltage, buzzer voltage
or contact closure
• Capable of switching signal to three zones
simultaneously
• Uses standard 1A2 key system voltages
• Each zone is equipped with a 5 Watt
amplifier and volume control
• Screw terminal connection
• Compact size, can be mounted on wall or in
cabinet
• Automatically switches paging speakers
from paging system to audible signal of the
V-9924C during the ring interval of the
incoming call
• Variable pitch control
• Two auxiliary contact closures
Other Materials Required
• -24VDC power supply
• Cat 3 or 5 twisted pair telephone cable
• Mounting screws and hardware
Dimensions/Weight
• 8.20" H x 4.55" W x 2.30" D
(20.83cm H x 11.56cm W x 5.84cm D)
• 1.3 lbs. (0.59kg)
Power Requirements
The V-9924C requires a -24VDC "B" battery
and draws 50mA idle and 300mA maximum
operating.
Signal Requirements
The V-9924C requires interrupted ringing or
buzzer voltage or dry contact closure to operate.
The output of the V-9924C will follow the
interruptions of the input. The ringing voltage
should be approximately 90VAC and the current
requirement would be 8mA. The buzzer voltage
should be approximately 18VAC and the current
requirement would be 10mA. The V-9924C
pulls approximately 3mA through a dry contact
closure for activation. Ringing and buzzer
voltages cannot be applied simultaneously. Use
only one method of activation.
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