2
947023
GROUND
-24 VDC
AUX 2 N.O.
AUX 2 COMMON
UNA CLOSURE
ZONE 3 OUT - TIP
ZONE 2 OUT - TIP
ZONE 1 OUT -RING
90 VAC SIGNAL
ZONE 3 IN - TIP
AUX 1 N.O.
SIGNAL COMMON
18 VAC SIGNAL
AUX 1 N.C.
UNA CLOSURE
AUX 1 COMMON
ZONE 1 IN - TIP
ZONE 2 IN - TIP
AUX 2 N.C.
ZONE 1 IN - RING
ZONE 1 OUT - TIP
ZONE 2 IN - RING
ZONE 2 OUT - RING
ZONE 3 IN - RING
ZONE 3 OUT - RING
11
12
13
7
22
14
15
25
23
24
10
8
16
17
1
2
18
19
3
4
20
21
5
6
9
From Page Unit
Speakers for Zone
From Page Unit
Speakers for Zone
From Page Unit
Speakers for Zone
System
To UNA or Ring
Power
AUX Relay
AUX Relay
Common
Audible
To Key
Dry Closure
Supply
Contacts
Contacts
FIGURE 1 – SIMPLIFIED BLOCK DIAGRAM
INSTALLATION
Precautions
Failure to observe the following precautions
could result in damage to the V-9924C and
other equipment.
a. Unplug the power supply when connecting
the power leads and signal leads to the unit.
These leads are brought in on adjacent
terminals. Accidental bridging of these two
terminals could damage the equipment.
b. Use pared crossconnect wire for all voice
connections and voltages.
c. Set all volume controls to their minimum
(counter clockwise) level.
Mounting
Remove the metal mounting plate from the rear
of the V-9924C enclosure. Using two #6 ¾"
wood screws, mount the plate in a vacant space
on the backboard with the telephone system
common equipment.
Both mounting holes
must be utilized to insure secure mounting
of the unit
(see Figure 1A).
Open the V-9924C enclosure to access
connections and option switches. Slide the rear
of the unit (contains the board) onto the
mounting plate and lock in place with screw
provided. Make connections.
Signaling Connections
The V-9924C can be activated via ringing
voltage, buzzer voltage or a dry contact closure.
When used with buzzer voltage, apply one side
of the pair to SIG COMMON (pin 11 or 26) and
the other side of the pair to 18VAC SIG (pin 12
or 27). For ringing voltage connections, put one
side of the pair on SIGCOMMON (pin 11 or 26)
and the other side of the pair to 90VAC SIG (pin
13 or 28).
The V-9924C can also be activated by
connecting one side of a dry contact closure to
pin 7 and the other side of the dry closure to pin
22.
Speaker Connections
The V-9924C Common Audible Ringing Unit is
capable of switching up to three zones of
speakers to the audible signal generated by the
unit. The device is intended to be placed in
series with the speakers. Zone 1 IN (pins 16
and 17)
are connected to the speaker/zone
output leads of the page control. Zone 1 OUT
(pins 1 and 2) are connected to the speakers.
Zones 2 and 3 hook up in a similar fashion.
Refer to Figure 2B for pin numbers.
Power Connections
Connect -24VDC from the power supply to pin
15 or 30 on the crossconnect block and ground
to pin 14 or 29.
Contact Closure
Two form C auxiliary contact closures are
provided on the V-9924C. These contacts
follow the input cadence and may be used for
special applications. The contact ratings are 1
Amp at 24VDC.
Set Up
After all connections are complete and double
checked, apply voltage to the unit. Place a call
to the telephone system and while ringing or
buzzer is being applied to the unit or when the
dry contact closure closes, adjust the volume of
each zone by turning the volume control
clockwise for each zone. Replace cover when
all connections and adjustments are complete
and lock in place using the #6 ½" screws
provided.
