KEPCO BOP 200-1M Bipolar Power Supply

The KEPCO BOP 200-1M (also known as BOP200-1M) is a high‑performance bipolar operational power supply that can function as a DC voltage source, DC current source, or power amplifier. It provides ±200 V output voltage and ±1 A output current with a maximum power of 200 W. The four‑quadrant operation allows it to both source and sink current, making it ideal for driving reactive loads, testing batteries, or simulating sensors. The BOP series is widely used in research labs, test engineering, and automated test equipment.

Technical Specifications

Output voltage: continuously adjustable from -200 V to +200 V. Output current: -1 A to +1 A. Maximum power: 200 W (voltage × current product ≤ 200 VA). Voltage regulation: line load 0.001% of max output voltage. Current regulation: 0.01% of max output current. Ripple and noise: < 5 mV rms (10 Hz to 1 MHz). Slew rate: > 5 V/µs. Bandwidth: DC to 5 kHz (full power). Input impedance: 100 kΩ (analog programming). Programming methods: front panel potentiometers, external analog voltage (0‑10V or 0‑±10V), or digital via optional GPIB (IEEE 488) or RS‑232. The power supply includes a built‑in monitor (0‑10V analog output proportional to voltage/current). Operating mode: constant voltage or constant current with automatic crossover. Protection: overvoltage, overcurrent, overtemperature. Input power: 105‑250 V AC, 50/60 Hz, 500 VA. Dimensions: 133 mm H x 426 mm W x 400 mm D. Weight approx. 15 kg. Operating temperature 0‑50°C.

Key Features

• Four‑quadrant bipolar output (source and sink)

• ±200 V, ±1 A, 200 W

• Low output noise and high bandwidth (5 kHz)

• Programmable via analog signal or digital interfaces

• Precise voltage and current regulation

• Automatic crossover between CV and CC modes

• Built‑in output monitor for feedback control

• Rack‑mountable design (half‑rack width)

Four‑Quadrant Operation

Unlike conventional power supplies that only source current (first quadrant), the BOP 200-1M operates in all four quadrants: positive voltage/positive current (source), positive voltage/negative current (sink, i.e., load), negative voltage/negative current (source), negative voltage/positive current (sink). This capability allows it to drive inductive or capacitive loads, simulate batteries, act as a bipolar current source for reactive components, and operate as a power amplifier for arbitrary waveforms.

Analog and Digital Control

The BOP can be programmed via front panel knobs for local operation. For remote control, an analog programming input (0‑±10 V) provides voltage or current command. The monitor outputs (0‑±10 V) deliver scaled readings of output voltage and current. Digital interfaces (optional GPIB or RS‑232) allow fully automated test sequences using SCPI commands. The unit also accepts external enables and fault signals via a rear terminal block. For high‑speed applications, the direct analog programming path has a bandwidth exceeding 10 kHz.

Protection Features

The BOP 200-1M includes programmable overvoltage and overcurrent protection (OVP/OCP). If the output exceeds the set limit, the power supply shuts down and a front panel LED indicates fault. Overtemperature protection de‑activates the output if internal temperature exceeds 85°C. The unit also has reverse polarity protection on the output (but not designed for continuous reverse voltage from external sources).

Applications

Typical uses include:

• Battery simulation and testing (charging/discharging profiles)

• Electrochemical cell cycling

• Magnetic coil and solenoid driving

• Power amplifier for precision AC waveform generation (with external function generator)

• Servo motor amplifier (low power)

• Laboratory DC source with sinking capability

Installation and Operation

The BOP 200-1M is suitable for 19‑inch rack mounting (1U height with optional ears). Use heavy‑gauge wire for output connections (up to 10 AWG) due to potential high current. The output is floating (isolated) up to ±200 V from chassis ground, but can be grounded via a rear strap. For analog programming, apply 0‑±10 V to the programming input terminals; use twisted shielded cable. For safety, always enable the output via the front “Output On/Off” button or remote enable. The unit is air‑cooled with a variable speed fan; ensure 50 mm clearance on sides.

Standards and Compliance

The BOP 200-1M is CE marked and complies with UL 61010‑1 (safety) and IEC 61326 (EMC). It is RoHS compliant. The design meets MIL‑STD‑461 for conducted emissions (optional filter).

Conclusion

The KEPCO BOP 200-1M provides exceptional versatility as a bipolar power supply and amplifier. Its four‑quadrant operation, wide voltage range, and programmable control make it a valuable tool for engineers working on power electronics, energy storage, and electrochemistry.