Valcom VP-4024B Manuals

VSP-VP-4024B Issue 6 1 947724 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 - • 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 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 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.