Triple Output DC Laboratory Bench Power Supply

This bench power supply combines laboratory-type performance and versatility with a host of the most often needed features in a triple output bench power supply. The Model 2555A is well suited for prototype design, student labs, production testing and solid state servicing. Its excellent value also makes it a favorite for experimenters and hobbyists. For tracking operation, a special front panel control allows the A and B supplies to track each other at any pre-selected voltage within the rated output. This feature is ideal for powering operational amplifiers and other circuitry that requires plus and minus voltages. The A and B supplies are individually controlled and completely isolated in the independent mode. The separate 5-volt output is rated at 3 amps. For higher voltage requirements, the three supplies can be series-connected to provide a 55 volt output at 0.5 amp.

Features of the 2555A Bench Power Supply:

• Three Fully Regulated DC Outputs: Two 0-25V at 0.5A and Fixed 5V at 3A
• Tracking or Independent Modes
• Dual Panel Meters to Simultaneously Monitor Voltage and Current of Each Output
• Excellent Load/Line Regulation with Low Ripple
• Floating Outputs--Can be used for Positive or Negative Voltages
• All Three-Outputs are Short-Circuit Proof with Automatic Current Limiting

Additional features include:

• reverse voltage protection on all supplies
• durable metal cabinet
• convenient push-button meter selection
• fused three wire line cord.

2555A Bench Power Supply Specifications:

Output Voltage - A & B Supply: 0 to 25 volts DC, continuously variable; 5-Volt Supply: 5 volts DC ±5% internally adjustable. Output Current - A & B Supply: 0 to 0.5 ampere; 5-Volt Supply: 0 to 3 amperes.
Load Regulation - (zero to full load): 0.05% on 25V Supplies; 0.3% on 5-Volt Supply.
Line Regulation - (105 to 125VAC): 0.02% on 25V Supplies; 0.1% on 5-Volt Supply.
Ripple & Noise: <1mV RMS on 25V Supplies; <1mV RMS on 5-Volt Supply.
Overload Protection: All supplies have fixed, automatic electronic current limiting which is set slightly above the rated output current. AC input is fuse-protected.
Tracking Error: <±0.2% from 5% to 100% of output voltage.
Polarity: Positive or negative ground on 25V Supplies or floating up to 300VDC. One positive and negative terminal is internally connected for Tracking. The 5V supply may be operated in any polarity or left floating..
Temperature - Operating/Storage:0° to +40°C/-20° to +75°C.
Power Requirements: 115/230 ± 10/20VAC, 50/60Hz, 115W.
Size (HWD): 5-1/2x12-1/8x10-1/2in. (140x308x267mm).
Weight: 13lb. (5.9kg).

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