Test & Measurement

DC load module offers 300W x 2 module option

7th December 2015
Mick Elliott

A new 300W dual-channel DC load module, the MDL302, has been introduced by B&K Precision for use with its modular programmable DC electronic load system, the MDL Series. The MDL302 adds to the six DC electronic load modules already offered in the series ranging in power from 200W to 600W.

Compared to the existing dual-channel module MDL252 with a variable 250W/50W configuration, this new DC load module provides a true dual channel design and an increased current range. It can support a full 300W on each input channel with a voltage and current operating range up to 80V/45A, offering the industry's highest power dual channel DC load module.

It is suitable for use in a variety of industries such as automotive, solar, and electronics manufacturing It has been designed for testing a wide range of DC power sources, including multi-output AC/DC power supplies, batteries, fuel cells, and photovoltaic arrays.

The high power density of 300W per channel saves valuable module install space. When installing multiple modules, this enables the MDL Series mainframe to have up to 8 or more 300W channels - up to 16 channels can be supported with the MDL002 mainframe extension. The load modules in the MDL Series mainframe can be used independently or synchronised and paralleled for increased current and power.

The MDL302 DC load module can operate in constant current (CC), constant voltage (CV), constant resistance (CR), constant power (CW), and constant impedance (CZ) mode, which uses DSP technology to simulate realistic non-linear loading behaviour. 

With a high resolution 16-bit measurement system, the system provides useful features such as adjustable current slew rates in CC mode, transient mode operation up to 25kHz, and list mode programming for generating complex sequences of input changes.

Up to 101 groups of setting parameters can also be saved for executing multiple test sequences in automatic production testing. 

For remote PC control, the module is supported by the mainframe's standard GPIB, Ethernet, USB, and RS232 interfaces compatible with USBTMC and SCPI communication protocols.

The mainframe also offers a built-in 8-pin control terminal for external triggering and synchronous load On/Off functions. The DC load module includes an analogue current control and monitoring terminal for external analogue programming. 

Additionally, the module continues to provide all necessary protection functions for various testing conditions: overvoltage (OVP), overcurrent (OCP), overpower (OPP), overtemperature (OTP), and local and remote reverse voltage (LRV/RRV) protection.



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