Valcom VP-12124 Service Manual

Issue 3

VP-12124

24 VOLT DC SWITCHING POWER SUPPLY

INTRODUCTION

These instructions provide the specifications,
installation and maintenance information for the
VP-12124 24 Volt Power Supply.

SPECIFICATIONS

The VP-12124 is a fully regulated 24VDC, 12 Amp
switching power supply. The primary is protected by a

6.3 Amp fuse and the six, 2 amp outputs by
auto-resetting fuses. The outputs are floating with
respect to ground. The regulator will maintain 24
Volts +/-2% over the rated range of input voltages and
output loads. A greater than 12 Amp load on power
up will cause the power supply to current limit. 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.
Outputs may be paralleled but not series connected.

Applications

The VP-12124 is designed to be used with:

• All Valcom page control units

• Valcom one-way amplified speaker assemblies

• Any application where 24VDC filtered talk battery

is required

Design Features

• VP-12124: 90-260VAC, 50/60Hz input

• Hold Up Time: 350mS Power Line Ride Through

• (6) LPS outputs (24VDC @ 2A each)

• Meets Canadian requirements classified Level 3

• Short Circuit Protection

• UL/CSA/TUV Approvals

• LED operational indicator

• EMI filtering

• Auto recovery overload protection

• 83% Efficiency Green Technology

• 3 second power-up delay to drive large capacitive

loads up to 40K µF

• Power Factor Correction

Output

Rated Power: 300 Watts
Voltage: 24 Volts
Current: 12 Amps (6 - 2A outputs)
Fusing: 6 - 2A, auto-reset polyswitch fuses
Ripple & Noise: 1% P-P Max

Environmental

Operating Temp: 0 to 40oC
Storage Temp: -40
Cooling: Free Air Convection
Humidity: 10 - 90% (non-condensing)

Shock:

Precautionary Notes

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

CAUTION: To reduce the risk of electric shock,

Refer servicing to qualified service personnel.

Do not remove cover.

No user serviceable parts inside.

This symbol indicates that dangerous
voltage constituting a risk of electric
shock is present within this unit.

o

to 85o C

Nominal Specifications

General

Efficiency: 83% @ 12A full load
Weight: 7.7 lbs. (3.5 Kg)
Dimensions: 12.10"H x 8.70"W x 3.90"D
(30.70cm x 22.10cm x 9.90cm)

Input - VP-12124

Voltage: 90-260VAC
Frequency: 50/60Hz
Full Load Line Current: 3A @ 120V/1.5A @ 240V
Rated Power: 360 Watts
Fusing: 6.3A Fast

INSTALLATION

Mounting

The VP-12124 is designed to be wall mounted, via
mounting slots, within 7 feet of an AC receptacle.

Connections

• Connections to Valcom page control units are
shown in Figure 1.

• When using the VP-12124 with Valcom page
equipment, a strap may be added from the local

This symbol indicates that there are
important operating and maintenance
instructions in the literature accompanying
this unit.

1 947280

V

ground terminal to either of the "+" outputs.

• When installing Valcom one-way amplified horns,
connect the white and black wires of the horn to
the power supply "-" and "+" terminals
respectively.

• When installing Valcom one-way speakers,
connect the "-24VDC" and "GND" terminals of the
speaker to the "-" and "+" terminals respectively.

• Plug power supply into wall outlet.

• Power supply activates after a 3 second delay.

NOTE: Each 24VDC screw terminal is fused by a
2 Amp polyswitch automatic type fuse. Therefore,
when connecting equipment to this power supply,
the load should be distributed between the (6) 2
Amp output terminals and each load should not
exceed 2 Amps.

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, have a VOM and a test set and
call from the job site. Call [phone] and press
1 for Technical 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:

TROUBLESHOOTING CHART

PROBLEMS SOLUTIONS

1. No output.

2. LED pulses in reset mode.

a. Verify AC present at receptacle.
b. Remove DC load and check for 24VDC using a VOM.
a. Locate and correct short circuit in output wiring.
b. Verify total equipment power consumption does not exceed 12 Amps.

Roanoke, VA 24019-5056

Valcom, Inc.

Repair and Return Dept.

5614 Hollins Road

Strap

- + - + - + - + - + - +

Local GND

24V O utputs

6 Outputs, 2 Amps eac h

Figure 1

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

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

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.

parts and labor will be applied to units defaced or physically damaged),

additional charges for parts and labor).

VALCOM LIMITED WARRANTY

Headquarters:

Valcom Inc.

5614 Hollins Road

Roanoke, VA. 24019-5056

Phone: [phone]

Fax: [phone]

P-12124

Power Supply

24V O utputs

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