Kepco BOP Bipolar Power Supply Operating Instructions

Product positioning and series models

Kepco BOP is a fully dissipative linear bipolar power supply, covering three power levels of 100W/200W/400W, used for high-precision testing and power driving.

Model and Power Correspondence Table

Typical power model output range

100W BOP 50-2 ±50V / ±2A

200W BOP 100-2 ±100V / ±2A

400W BOP 20-20 ±20V / ±20A

Core working principle

Dual mode control: voltage mode constant voltage, current mode constant current, choose one to work.

Bipolar output: capable of outputting * * ± voltage/± current * *, supporting source/sink bidirectional current.

Automatic switching: When the amplitude limit is reached, it automatically switches from control mode to amplitude limit mode.

Two channel preamplifier: voltage/current channel independent preamplifier, supporting direct external signal drive.

Electrical specifications

input

Voltage: 115V/230V AC switchable, 50~65Hz

Protection: Front panel circuit breaker, full voltage effective

environment

Working temperature: 0~+55 ℃

Storage temperature: -40~+85 ℃

Cooling: Built in fan exhausts air backwards

output performance

Voltage/current: ± 100% full range continuously adjustable

Ripple noise:<30mV rms,<0.1%

8-hour temperature drift: 0.01%

Bandwidth: DC~several hundred kHz (different models)

Pressure swing rate: up to 0.5A/μ s, 10V/μ s

Operation mode

1. Local operation (front panel)

Mode switch: Select voltage/current

Adjustment knob: Set output value

Limiting knob: independently set * * ± voltage, ± current * * limiting knob

Header: Zero center table, accuracy * * ± 2% F.S**

2. Remote operation

Signal: ± 10V control full range output

Interface: Rear PC-12 50 pin programming connector

Support: direct control of potentiometers, resistance boxes, and signal sources

Remote error detection: compensating for line voltage drop for higher accuracy

3. Digital control (recommended)

Module: BIT 4886 16 bit card insertion

Bus: GPIB (IEEE488.2), RS232

Protocol: SCPI, CIIL

Communication parameters: 9600 baud, 8N1

System Expansion

Series connection: master-slave mode, voltage superposition, maximum isolation of 500V

Parallel connection: master-slave mode, current sharing

Linkage protection: If one device fails, all devices will shut down

Load and stability

Resistive load: optimal performance, no oscillation

Inductive load: 0.1~1 μ F parallel capacitor is required to suppress oscillation if>0.5mH

Capacitive load: Allow * *<0.2F**

Power outage protection: It is recommended to install UPS and reset the output to zero before shutting down

Installation and wiring

Grounding: Class I equipment must be reliably grounded

Output: Choose between front and rear terminals, cannot be used simultaneously

Sensing: The sensing terminal must be on the same side as the output

Prohibition: The output terminal must not be directly grounded to avoid damage

Calibration and maintenance

Internal calibration: ± 10V reference, zero point of ammeter, linearity of optocoupler

Calibration tools: digital multimeter, oscilloscope

Maintenance: Regularly clean the dust and keep the air duct unobstructed

Security and Certification

Standard: EN61010-1:2001, LVD low voltage command

Protection: Comprehensive protection against overcurrent, overvoltage, overtemperature, and power failure

Identification: Output end with high voltage danger warning

Key issues

Question 1: What is the core difference between voltage mode and current mode of BOP power supply? What loads are suitable for each?

answer:

Voltage mode: outputting a constant voltage, the current is determined by the load, and automatically limiting the amplitude when reaching the current limit value; Suitable for loads such as resistors, instruments, amplifiers, etc. that require stable voltage.

Current mode: outputting a constant current, voltage determined by the load, and automatically limiting when the voltage limit is reached; Suitable for loads such as coils, motors, inductors, etc. that require stable current.

Question 2: When driving a large inductive load, BOP is prone to oscillation. Which two reliable solutions are provided in the manual?

answer:

Connect 0.1-1.0 μ F capacitors in parallel at both ends of the load.

Parallel RC series network (R=100~500 Ω, C=0.1~0.5μF）。

High power models can be upgraded to ML version to eliminate wide range inductive load oscillation.

Question 3: How can BOP achieve multi platform expansion? What should be noted for series and parallel connections?

answer:

Series connection: Set all to voltage mode, controlled by the main unit, followed by the slave units, output voltage superposition, total voltage not exceeding 500V isolated withstand voltage.

Parallel connection: All are set to current mode, controlled by the main unit, followed by the slave units, output current is evenly distributed, and the cables need to be thick enough.

Common requirement: master-slave linkage protection must be used, and all faulty devices must be shut down.