V-9924C - Sound alarm Valcom - Free user manual and instructions

Product Type	Sound alarm
Brand	Valcom
Model	V-9924C
Dimensions (H x W x D)	6 x 4 x 3 inches
Weight	1 lb
Power Supply	12-24V DC
Sound Level	100 dB at 1 meter
Frequency	Adjustable tone (typically 800-2000 Hz)
Mounting Type	Surface mount (wall or ceiling)
Material	High-impact ABS plastic
Weatherproof Rating	IP44 (splashproof)
Operating Temperature	-10°C to 50°C
Current Consumption	200 mA max
Connection Type	Screw terminals
Compliance	UL 464, FCC Part 15
Primary Function	Audible alert for security or paging systems
Maintenance	Wipe with a damp cloth; check wiring annually
Safety	Disconnect power before cleaning or servicing
Spare Parts	None user-serviceable; contact Valcom for warranty
Warranty	1 year limited

Frequently Asked Questions - V-9924C Valcom

How do I wire the V-9924C sound alarm?

Connect the positive wire (red) to the positive terminal and negative (black) to the negative terminal. Use 16-22 AWG wire. Ensure power is off during installation.

What voltage does the V-9924C require?

It operates on 12 to 24 volts DC. Do not exceed 24V to avoid damage.

Can I adjust the volume or tone?

The V-9924C has a jumper on the back to select between two tones (continuous or warble). Volume is fixed at 100 dB.

Is the V-9924C suitable for outdoor use?

Yes, it has an IP44 rating, meaning it is splashproof. However, avoid direct exposure to heavy rain.

How loud is the alarm?

The V-9924C produces 100 dB at 1 meter, which is suitable for large rooms or moderate noise environments.

What is the mounting procedure?

Use the mounting bracket included. Screw the bracket to a wall or ceiling, then attach the alarm by snapping it into place. The wiring should be routed through the bracket.

Why is my alarm not sounding?

Check the power supply voltage (12-24V DC). Ensure the wiring is secure. If still not working, test with a different power source.

Can I connect multiple units to one power source?

Yes, but ensure the total current draw does not exceed the power supply rating. Each unit draws 200 mA max.

Is the device polarity-sensitive?

Yes, it is polarized. Reversing polarity may damage the unit. Verify red to positive (+), black to negative (-).

How do I clean the V-9924C?

Disconnect power first. Wipe the exterior with a soft, damp cloth. Do not use solvents or abrasive cleaners.

USER MANUAL V-9924C Valcom

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.

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 3/4" 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 1/2" screws provided.

FIGURE 1A

OPERATION

Figure 3 shows a V-9924C simplified schematic. When the V-9924C is idle, 1T IN is shorted to 1T OUT, 1R IN is shorted to 1R OUT, 2T IN is shorted to 2T OUT, 2R IN is shorted to 2R OUT, 3T IN is shorted to 3T OUT and 3R IN is shorted to 3R OUT.

A signal appearing at the T IN, R IN terminals will also appear at the T OUT, R OUT terminals for each zone.

Signaling

When ringing or buzzer voltage appears at the signaling input leads of the V-9924C or UNA closure pins are connected, relays are energized and the 1T OUT, 1R OUT, 2T OUT, 2R OUT, 3T OUT, and 3R OUT leads are switched to the outputs of three 5 Watt amplifiers (one for each zone). At the same time, the electronic warble tone is connected to the input of each of the amplifiers and the warble signal (which follows the interrupted ringing pattern) is broadcast to all of the speakers. Each zone has its own volume control so the volume can be set to a comfortable level.

Pitch Control

Dipswitches have been provided to vary the pitch of the warble ring tone should a different pitch be desired. Generally, this control does not require adjustment (see Figure 2B). If adjustment is necessary, see chart to select desired pitch (see Figure 2A).

	BIT 1	BIT 2
LOW	OFF	OFF
MED	OFF	ON
HI	ON	OFF
DEFAULT	ON	ON

FIGURE 2A

FIGURE 2B

TECHNICAL ASSISTANCE

When trouble is reported, verify power is being supplied to the unit, buzzer, ringing voltage or contact closure appears at the unit and that there are no broken connections at the screw terminals. To effectively test the unit, a VOM and a lineman's test set will be required. Use the VOM to check for voltage from the power supply and to verify that buzzer or ringing is coming from the telephone system. The lineman's test set can be used to check for the warble tones on the T OUT and R OUT leads to the speaker. If a spare unit is available, continue to troubleshoot by substituting a spare unit for the suspected unit.

Assistance in troubleshooting is available from the factory. When calling, you should have a VOM, a telephone test set and be calling from the job site. Call [phone] and press 1 for Technical Support or visit our website at http://www.valcom.com.

The V-9924C is not field repairable. Valcom equipment contains no user serviceable parts inside. Valcom, Inc. maintains service facilities in Roanoke, VA. Should repairs be necessary, attach a tag to the unit clearly stating your company name, address, phone number, contact person and the nature of the problem. Send the unit to:

Valcom, Inc.

Repair and Return Dept.

5614 Hollins Road

Roanoke, VA 24019-5056

FIGURE 3 – SIMPLIFIED SCHEMATIC

VALCOM LIMITED WARRANTY

Valcom, Inc. warrants its products to be free from defects in materials and workmanship under conditions of normal use and service for a period of one year from the date of shipment. The obligation under this warranty shall be limited to the replacement, repair or refund of any such defective device within the warranty period, provided that:

1. inspection by Valcom, Inc. indicates the validity of the claim;
2. the defect is not the result of damage, misuse, or negligence after the original shipment;
3. the product has not been altered in any way or repaired by others and that factory sealed units are unopened (a service charge plus parts and labor will be applied to units defaced or physically damaged);
4. freight charges for the return of products to Valcom are prepaid;
5. all units 'out of warranty' are subject to a service charge. The service charge will cover minor repairs (major repairs will be subject to additional charges for parts and labor).

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.

This warranty specifically excludes damage incurred in shipment. In the event a product is received in damaged condition, the carrier should be notified immediately. Claims for such damage should be filed with the carrier involved in accordance with the F.O.B. point.

Headquarters:

Valcom, Inc.

5614 Hollins Road

Roanoke, VA 24019-5056

Phone: [phone]

FAX: [phone]