Valcom vp 4024b User Manual

VP-4024B
-24 VOLT DC POWER SUPPLY

INTRODUCTION

These instructions provide the specifications, installation and maintenance information for the VP-4024B, -24 Volt Power Supply.

SPECIFICATIONS

The VP-4024B is a fully regulated -24 Vdc 4 amp power supply. The primary is protected by a circuit breaker and the two amp outputs by fuses. The output is floating with respect to ground, and the two outputs may be connected together for one 4 amp output. The regulator will maintain -24 volts "2V over the rated range of input voltages and output loads. A greater than 4 amp load on power up will cause the power supply to current limit and the overload LED will light. Short circuit protection is provided. Over voltage is provided to limit the output voltage to approximately -28 volts should a failure occur within the power supply.
Applications
The VP-4024B is designed to be used with -
VSP-VP-4024B
Issue 6
Nominal Specifications
Power Requirements Input Voltage: 105-120 Vac, 60 Hz, 150 watts max
1.75 amps Dimensions: 7.0"H x 9 .5”W x 5.5"D (17.78cm H x 24.13cm W x 13.97cm D) Weight: 12 lbs. (5.45 kg) Output Characteristics: -24 Vdc regulated "2V
"A" battery
Ripple 10 millivolts RMS max.
Two 2 amp outputs
All Valcom page control units
Valcom one-way amplified speaker assemblies
Any application where -24 Vdc filtered talk
battery is required
Design Features
Regulated -24 volts DC "A" battery
Two 2 amp fused outputs
Outputs may be connected for one output total 4
amps at 25 degrees C
Input circuit breaker protected
LED indication of output overload
Full current limiting
Over voltage protection
Floating output
Full electronic supply

INSTALLATION

The VP-4024B is designed to be wall mounted within 7 feet of an AC receptacle. A cold water pipe or earth ground should be connected to the local ground screw terminal using 12 AWG or larger ground wire.
Connections
Connections to Valcom page control units are
shown in Figure 1.
When using the VP-4024B with Valcom page
equipment, a strap may be added from the local ground terminal to either of the ground outputs.
When installing Valcom one-way amplified
horns, connect the white and black wires of the horn to the power supply -24V and ground terminals respectively.
When installing Valcom one-way speakers
connect the -24V and ground terminals of the speaker to the corresponding power terminals.
1 947724
NOTE: Each –24 Vdc screw terminal is fused by a 2 amp WER 2 type fuse. Therefore, when connecting equipment to this power supply, the load should be distributed between the (2) 2 amp output terminals and each load should not exceed 2 amps.
Permanent Installation Instructions
(For use when local codes require conduit to power supply)
Before beginning this procedure, disconnect power supply from AC service and customer connections.
A. Connect the AC input green/grounding
conductor and the green ground wire from the faceplate to the chassis connection for the ground wiring.
B. Connect the black wire to the circuit breaker
terminal using a .250" tab receptacle.*
C. Connect the white wire to the transformer
terminal using a .250" tab receptacle.*
6. Join faceplate to cabinet; replace the six (6)
screws and lockwashers.
7. Reconnect supply to customer connections,
and return power supply to service.
1. Open cover of supply. Remove the six (6) screws holding the faceplate to the cabinet.
2. Using pliers, squeeze the strain relief bushing associated with the AC input cord. This enables the removal of the power cord and strain relief bushing from the unit.
3. Separate faceplate from cabinet. Disconnect the power cord leads from the supply - black wire from the circuit breaker; white wire from the transformer; green wire from the chassis connection.
4. Using a knockout punch (Greenlee #3807 or equivalent), enlarge the power cord access hole to 0.875" diameter to accommodate a 1/2" trade side conduit fitting.
5. Install conduit fitting and run the AC input leads through the fitting. Connect as follows:
NOTE: The minimum recommended wire size for AC input leads is 18 AWG; use wire rated for at least 105 degrees C.
* AMP #42660-2 or an equivalent.

TECHNICAL ASSISTANCE

When trouble is reported, verify the unit is properly connected and there are no broken connections leading to this unit.
Assistance in troubleshooting is available from the factory. When calling, you should have a VOM and a test set and be calling from the job site. Call (540) 427-3900 and ask for Technical Support, or (540) 427-6000 for Valcom 24-hour Automated Support or visit our website at http://www.valcom.com.
Valcom equipment is not field repairable. Valcom, Inc. maintains service facilities in Roanoke, VA. Should repairs be necessary, attach a tag to the unit clearly stating 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
Problem Solution
1. No output.
2. Overload LED lights.
3. Blows fuses.
TROUBLESHOOTING CHART
a. Verify AC present at receptacle. b. Check for blown fuse. c. Press circuit breaker to reset.
a. Locate and correct short circuit in output wiring. b. Verify total equipment power consumption does not exceed 4 amps.
a. Verify total equipment power consumption does not exceed 2 amps per output. b. Disconnect AC while making p ower connections.
2 947724
Valcom, Inc. warrants its products to be free from defects in materials and w orkmanship under conditions of normal use and service
VALCOM LIMITED WARRANTY
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
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
This warranty is i n lieu of and exclud es al l other warranties, expressed or imp lied, and in no event shall Valco m, 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 condit ion, 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.
charge plus parts and labor will be applied to units defaced or phy sically damaged),
subject to additional charges for parts and labor).
Headquarters: In Canada
Valcom, Inc. CMX Corporation
1111 Industry Avenue 35 Van Kirk Drive #11 and 12
Roanoke, VA 24013 Brampton, Ontario L7A1A5
Phone: (540) 427-3900 Phone: (905) 456-1072
FAX: (540) 427-3517 FAX: (905) 456-2269
VP-4024B POWER SUPPLY
PAGE CONTROL UNIT
A GROUND A BATTERY B GROUND B BATTERY
Alternate Ground Method: If using earth or cold water pipe ground, do not connect to LOC GND.
STRAP
-24V
-24V
GND
GND
LOC GND
STRAP
EARTH OR COLD WATER PIPE GROUND
FIGURE 1 - CONNECTIONS TO VALCOM PAGE CONTROL UNITS
3 947724
Loading...