Description Pro Intercom PS301 3-Circuit Power Supply with Program Audio Input Power Supply, 3-circuit, 24VDC Linear, Program Input, 2.4Amp The Pro Intercom PS301 is designed as a perfect combination of analog/linear working in conjunction with digital circuitry. The Pro Intercom PS301's linear supply section with a toroidal transformer paired with linear regulators is working for the nearly total elimination of all stray radiation. The Pro Intercom PS301 is working well with other audio gear and sensitive lighting nearby. The PS301's built-in microprocessor is designed for monitoring the voltage, temperature, and the current status of both input and output. At 24 volts DC, power is thoroughly regulated and decreases automatically when needed. Current limiting in addition to short-circuit protection is preventing any hardware damage if ever a connection error or cable failure occur, A discreet buit-in fan turns on when needed for decreasing the overall temperature of the unit. The Pro Intercom PS301 also comes with a program input that can be channeled to any or even all of its three circuits. The unit also functions in either the 120VAC or 240VAC range. FEATURES Ideal combination of analog/linear with digital circuitry Virtually eliminates stray-field radiation Works well with others sensitive audio and lighting gear close by Features a quiet built-in fan that turns on automatically when needed to cool unit Since each PS301 circuit is individualized, an issue with one does not impact the others Microprocessors control all of the switching, routing, and supervision capabilities, while the audio paths and power supply stay true to their analog character. The PS301 can be used with any unbalanced 200 ohms party-line intercom components. Power Supply The PS301 can be used with any unbalanced 200 ohms party-line intercom components. The components and microprocessor which monitor and adjust the power supply's performance are separately mounted on their own circuit board, as far as possible from any heat source. At as low as 100VAC, the secondary voltage will remain at 24VDC while the available current will be slightly reduced from 2.4A continuous to 2.0A continuous. The transformer has primary windings for both 120VAC and 240VAC (50/60 Hz) and allows wide deviation from those voltages without any effect on performance. The voltage and fuse are changed on the rear panel. The microprocessor will also adjust the percentage of the 2.4A (continuous) current that is allocated to each circuit, depending upon the load on each. Reports the status of each circuit to LED indicators on the front panel: The top, green LED reports that 24VDC is being delivered to the system. The lower 3 red LEDs flash when that circuit is experiencing an overload and stay on constantly when thecircuit has been shorted and therefore shut down until the problem is solved. The monitoring and control functions include automatic adjustment of the termination impedance when the circuits are combined, adjusting to brown-outs or sudden drops in line voltage, monitoring the temperature of the heat sink and switching the cooling fan on when required After a circuit problem is eliminated, the PS301 continues to function normally with having to re-boot Since each PS301 circuit is individualized, an issue with one does not impact the others Able to perform alongside nearby electronic devices without interference The result of this combination is unmatched flexibility, structual strength, and clean, rich audio. Microprocessors control all of the switching, routing, and supervision capabilities, while the audio paths and power supply stay true to their analog character. The PS301 is a 3-circuit Power Supply with a specialized hybrid composition. SPECIFICATIONS Current draw (at 120VAC): 0.14A (no load), 1.05A @ 2.4A DC out Power output: 24 volts DC regulated @ 2.4A continuous Line termination: DC: 5K ohms, 50 Hz-20 KHz: 200 ohms Aux. input: Mic level: (-44dBm) 48K ohms, Line level (-24dBm): 1K ohms Size (excluding ears) : 17" width x 9.5" depth x 1.75" height (432 x 241 x 44.5 mm) Weight: 9.8 lbs. 4.5 Kg
