The MDL4UB Series is a multi-channel modular programmable electronic loads system designed in a compact 4U form factor. It offers nine different types of programmable DC load modules that range from 200 W to 600 W, giving users the flexibility to test various power sources, including multi-output DC power supplies, batteries, fuel cells, and photovoltaic arrays.

MDL4UB Series Mainframe includes a controller and four open slots, allowing for any combination of modules up to a total of 2400 W (and up to 4800 W with a mainframe extension). The high-performance electronic load modules can operate in four modes: constant current (CC), constant voltage (CV), constant resistance (CR), and constant power (CW).

Users can easily adjust the load parameters—such as voltage, current, slew rate, and width—via the front panel. To improve productivity, users can save their test parameters in any of the 101 available memory slots for quick recall. Additionally, the MDL4UB Series features 16-bit resolution, multiple protection modes, and a power-on system self-test to ensure stable and reliable operation.

For remote communication, the MDL4UB Series supports LAN, USB (USBTMC-compliant), RS232, and GPIB standard interfaces, all of which are compatible with the SCPI command protocol.

Modules Comparison

Populate the mainframe or mainframe extension with any combination of four modules from the below options.

* The MDL4U102B, MDL4U252B, MDL4U302B, and MDL4U502B are dual channel modules where total power is allocated between channels. For example, the MDL4U102B can allocate a maximum of 150 W to either channel up to 200 W total (e.g. 150 W/50 W, 100 W/100 W, 50 W/150 W).

Backwards Compatibility:

The MDL4UB Series modules are compatible with existing MDL4U (non-B) modules and can share the same mainframe. This allows users to upgrade their modules or expand their test setups without needing to purchase a new mainframe.

Product Features

• Power range up to 2400 W (Up to 4800 W with mainframe extension)
• Voltage range up to 600 V
• Current range up to 120 A
• CC/CV/CR/CW operating modes
• Removable modules for easy system configurability
• Support for up to 16 channels using dual channel modules with mainframe extension
• Operate identical modules in parallel mode for high current applications
• Synchronous load on/off function
• Standard LAN, GPIB, USB, and RS232 interfaces with USBTMC/SCPI protocol support
• Analogue current control and monitoring
• Transient mode up to 25 kHz
• List mode (sequence mode) – minimum 20 μs step width with 84 user programmable steps
• Adjustable slew rate in CC mode
• 16-bit voltage and current measurement system providing high resolution of 0.1 mV and 0.01 mA
• Front and rear panel load input terminals
• 4U form factor
• Remote sense
• LabVIEW drivers and operating software included
• Rack-mount brackets with handles included

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The MDL4U Series is a multi-channel, modular programmable electronic load system designed for versatility in testing various power sources. It includes seven different modules of programmable DC loads, with power ratings ranging from 200 W to 600 W. This gives users the flexibility to test power supplies such as multi-output DC power sources, batteries, fuel cells, and photovoltaic arrays.

The mainframe of the system features a controller and four open slots that can accommodate a combination of modules, allowing for a total power capacity of up to 2400 W (expandable to 4800 W with a mainframe extension). The high-performance electronic load modules can operate in four modes: constant current (CC), constant voltage (CV), constant resistance (CR), and constant power (CW).

Users can easily modify the load parameters—such as voltage, current, slew rate, and width—using the front panel. To enhance productivity, test parameters can be saved into any of the 101 available memory areas for quick recall. The MDL4U Series also features 16-bit resolution and includes multiple protection modes, alongside a power-on system self-test to ensure reliable performance.

For remote communication, the MDL4U Series supports various standard interfaces, including LAN, USB (USBTMC-compliant), RS232, and GPIB, all of which adhere to the SCPI command protocol..

Modules Comparison

Populate the mainframe or mainframe extension with any combination of four modules from the below options.

* The MDL4U252 and MDL4U302 are dual-channel load modules. The MDL4U252 can allocate up to 250 W to either channel up to 300 W total. (e.g. 250 W/50 W, 150 W/150 W). Similarly, the MDL4U302 can allocate 300 W to either channel up to 600 W total (e.g. 300 W/300 W)

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Customise the MDL4UB Series Programmable Electronic Loads Mainframe with any combination of the 9 available modules. The modular design allows for multiple channels, and is ideal for testing several units, especially power supplies with multiple outputs. At the same time, all load modules can be configured to work independently.

All load modules, including the high-power 500 W and 600 W modules, can fit in one slot. Unlike competitor models that require two slots for high-power modules, the MDL4UB Series offers a one-slot form factor for all modules.

Product Features

• Modules offer wide voltage and current range, 0 to 600 V, 0 to 120 A
• Support for up to 4 modules/8 channels or 8 modules/16 channels with mainframe extension
• Transient mode up to 25 kHz
• Synchronous load on/off function
• Adjustable slew rate in CC mode
• LabVIEW drivers and operating software included
• Standard LAN, GPIB, USB, and RS232 interfaces with USBTMC/SCPI protocol support
• Short circuit test simulates a short at the input
• Built-in 16-bit resolution voltage and current measurement (0.1 mV, 0.01 mA)
• Remote voltage sensing to compensate for the effect of voltage drop in wires
• Operate identical modules in parallel mode for high current applications
• OVP/OCP/OPP/OTP and reverse voltage protection

Modules Comparison

Populate the mainframe or mainframe extension with any combination of four modules from the below options.

* The MDL4U102B, MDL4U252B, MDL4U302B, and MDL4U502B are dual channel modules where total power is allocated between channels. For example, the MDL4U102B can allocate a maximum of 150 W to either channel up to 200 W total (e.g. 150 W/50 W, 100 W/100 W, 50 W/150 W).

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The BK 8600 Series offers exceptional transient response times and high 16-bit measurement resolution, making them the ideal standalone DC loads for testing and evaluating a wide range of DC sources, including DC power supplies, DC-DC converters, batteries, battery chargers, and photovoltaic arrays.

Designed for versatility, these DC loads operate in four distinct modes: constant current (CC), constant voltage (CV), constant resistance (CR), and constant power (CW). They can be dynamically configured to provide rapidly changing loads to DC sources, featuring quick load switching times. The robust internal, external, and remote triggering options allow for seamless synchronization of dynamic load behavior with various events. To maximize efficiency, you can easily save your test parameters in any of the 100 available memory slots for quick retrieval when needed. All load parameters—voltage, current, slew rate, and width—can be easily adjusted via the front panel or programmed remotely.

The BK 8625 model comes equipped with standard USB (USBTMC-compliant), RS232, and GPIB interfaces for straightforward remote communication.

To ensure reliable testing, this series features a power-on system self-test along with a comprehensive suite of protection features, including overtemperature protection (OTP), overvoltage protection (OVP), overcurrent protection (OCP), overpower protection (OPP), and local/remote reverse voltage protection (LRV/RRV).

Product Features

• Input Power: 6000 W
• Input Voltage: 120 V
• Input Current range: 0 – 720 A
• Operating modes: CC/CV/CR/CW
• Adjustable slew rate in CC mode
• Transient mode: up to 25 kHz
• List mode function, battery test function, automatic test mode, CR-LED mode
• Standard USB (USBTMC-compliant), RS232 interfaces supporting SCPI commands and GPIB
• Protection features: OVP/OCP/OPP/OTP, including local and remote reverse voltage (LRV/RRV) protection

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With exceptional transient response times and high 16-bit measurement resolution, their standalone DC loads are the optimal choice for testing and evaluating a wide range of DC sources, including DC power supplies, DC-DC converters, batteries, battery chargers, and photovoltaic arrays.

Engineered for versatility, these DC loads operate in four distinct modes: constant current (CC), constant voltage (CV), constant resistance (CR), and constant power (CW). They can be dynamically configured to provide rapidly changing loads to DC sources, featuring swift load switching times. The robust internal, external, and remote triggering options allow for seamless synchronization of dynamic load behaviour with various events. To maximize efficiency, you can effortlessly save your test parameters in any of the 100 available memory slots, ensuring quick retrieval when needed. All load parameters—voltage, current, slew rate, and width—can be easily adjusted via the front panel or programmed remotely.

The BK 8600 and BK 8600B Series come equipped with standard USB (USBTMC-compliant) and RS232 interfaces for straightforward remote communication, with optional GPIB available on select models (note that GPIB is not included in models with the suffix B, e.g. 86xxB).

To guarantee reliable testing, this series features a power-on system self-test along with a comprehensive suite of protection features, including overtemperature (OTP), overvoltage (OVP), overcurrent (OCP), overpower (OPP), and local/remote reverse voltage (LRV/RRV) protection. 

Product Features

• Power range: up to 3000 W
• Voltage range: up to 500 V
• Current range: up to 480 A
• Operating modes: CC/CV/CR/CW
• Adjustable slew rate in CC mode
• Transient mode: up to 25 kHz
• List mode function, battery test function, automatic test mode, CR-LED mode
• Standard USB (USBTMC-compliant) and RS232 interfaces supporting SCPI commands
• GPIB option available on select models
• Protection features: OVP/OCP/OPP/OTP, including local and remote reverse voltage (LRV/RRV) protection

Model Comparison

Standard models include USB, RS232, and GPIB interfaces; those with suffix B (e.g. BK 86xxB) only have USB, and RS232 interfaces.

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With fast transient response times and high 16-bit measurement resolution, these standalone DC loads are ideal for testing and evaluating various DC sources, including DC power supplies, DC-DC converters, batteries, battery chargers, and photovoltaic arrays.

The DC loads can operate in four modes: constant current (CC), constant voltage (CV), constant resistance (CR), or constant power (CW). They can also be configured to provide a dynamically changing load to the DC source with quick load switching times. Versatile internal, external, and remote triggering options allow for synchronisation of the dynamic load behaviour with other events. To enhance productivity, you can save your test parameters in any of the 100 available memory areas for quick retrieval. All load parameters, such as voltage, current, slew rate, and width, can be adjusted via the front panel or programmed remotely.

The BK 8600 and BK 8600B Series features standard USB (USBTMC-compliant) and RS232 interfaces for remote communication, with GPIB available as an option on select models (NOT included in models with suffix B, e.g. 86xxB).

To ensure reliable testing, the series includes a power-on system self-test and various protection features, including overtemperature (OTP), overvoltage (OVP), overcurrent (OCP), overpower (OPP), and local/remote reverse voltage (LRV/RRV) protection.

Product Features

• Power range: up to 250 W
• Voltage range: up to 500 V
• Current range: up to 60 A
• Operating modes: CC/CV/CR/CW
• Adjustable slew rate in CC mode
• Transient mode: up to 25 kHz
• List mode function, battery test function, automatic test mode, CR-LED mode
• Standard USB (USBTMC-compliant) and RS232 interfaces supporting SCPI commands
• GPIB option available on select models
• Protection features: OVP/OCP/OPP/OTP, including local and remote reverse voltage (LRV/RRV) protection

Model Comparison

Standard models include USB, RS232, and GPIB interfaces; those with suffix B (e.g. BK 86xxB) only have USB, and RS232 interfaces.

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