V-9924C COMMON AUDIBLE RINGING UNIT

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(1)Issue 0. 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 Electronic Key System Station Port Contact Closure. Dimensions/Weight • •. Features • • • • • • •. • •. 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. (.59kg). Power Requirements. 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 Contains a punchdown block as part of the unit 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. 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.. Other Materials Required • • •. -24VDC power supply Cat 3 or 5 twisted pair telephone cable Mounting screws and hardware. 1. 947023.

(2) To Key System Common Audible To UNA or Ring Dry Closure. SIGNAL COMMON. 11. 16. ZONE 1 IN - TIP. 18 VAC SIGNAL. 12. 17. ZONE 1 IN - RING. 90 VAC SIGNAL. 13. 1. ZONE 1 OUT - TIP. UNA CLOSURE. 7. 2. ZONE 1 OUT -RING. UNA CLOSURE. 22. 18. ZONE 2 IN - TIP. GROUND. 14. 19. ZONE 2 IN - RING. Power Supply AUX Relay Contacts. AUX Relay Contacts. -24 VDC. 15. 3. ZONE 2 OUT - TIP. AUX 1 N.O.. 25. 4. ZONE 2 OUT - RING. AUX 1 COMMON. 23. 20. AUX 1 N.C.. 24. 21. ZONE 3 IN - RING. AUX 2 N.O.. 10. 5. ZONE 3 OUT - TIP. AUX 2 COMMON. 8. 6. ZONE 3 OUT - RING. AUX 2 N.C.. 9. ZONE 3 IN - TIP. From Page Unit Speakers for Zone From Page Unit Speakers for Zone From Page Unit Speakers for Zone. 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.. 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.. 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.. Set Up. 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). 2. 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..

(3) WIRE TIE LOOP WIRE TIE USED TO B UNDLE WIRES ENTERING AND LE AVING TERMINAL ARE A. TO REMO VE CO VER LOOSEN SCREW , THE N AC TIVATE L ATC H. WIREW AY OPENING TO W ALL PLATE AND JUNCTIO N BOX. METAL W ALL MO UNTING PLATE. .155 DIA. HOLES FOR MOUNTING TO SINGLE OR DO UBLE GANG JUNC TIO N BOX HOLE PATTER N M ATC HES BOTH E URO AND US JUNC TIO N BOXES. SNAP LATC H 1.5 x 2 W IRE ACCESS OPENING TO JUNC TIO N BOX. CIRCUIT BO ARD HO USING ASSEMBLY PLASTIC COVER. SNAP LATC H FOR COVER. BRACKET LOCKING SCREW. FIGURE 1A. Pitch Control. 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. 3. 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)..

(4) from the job site. Call (540) 563-2000 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:. 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 punchdown block. 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 available and call. Valcom, Inc. Repair and Return Dept. 5614 Hollins Road Roanoke, VA 24019-5056. ZONE 1 ZONE 2. BIT 1. ZONE 3. BIT 2 PITCH CONTROL. 15 14 13 12 11. 10. 9. 8. 7. 6. 5. 4. ZONE 1 OUT. ON. ZONE 2 OUT. ON. ZONE 3 OUT. *DEFAULT. UNA CLOSURE. OFF AUX 2 COMMON. ON. AUX 2 N.C.. HI. AUX 2 N.O.. ON. 2. SIGNAL COMMON. OFF. 18 VAC SIGNAL. MED. 1. 105 VAC SIGNAL. OFF. GROUND. OFF. -24 VDC. LOW. 3. 2. 1. FIGURE. 4. 2B. 21 20. 19 18. 17 16. ZONE 2 IN. ZONE 1 IN. UNA CLOSURE. AUX 1 COMMON. AUX 1 N.C.. AUX 1 N.O.. 26 25 24 23 22. SIGNAL COMMON. 18 VAC SIGNAL. 90 VAC SIGNAL. GROUND. -24 VDC. 30 29 28 27. ZONE 3 IN. FIGURE 2A.

(5) FIGURE 3 – SIMPLIED 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. 2. 3. 4. 5.. inspection by Valcom, Inc. indicates the validity of the claim; the defect is not the result of damage, misuse, or negligence after the original shipment; 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); freight charges for the return of products to Valcom are prepaid; 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: (540) 563-2000 FAX: (540) 362-9800. In Canada CMX Corporation 35 Van Kirk Drive #11 and 12 Brampton, Ontario L7A 1A5 Phone: (905) 456-1072 FAX: (905) 456-2269. 5.

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