The BK Precision MDL002-220V Mainframe Extension is designed as a companion to the MDL001 Modular Programmable Load system. The MDL002-220V is a multi-channel modular programmable electronic load system, with extensions allowing greater power and more room for modules. Six different modules of programmable DC loads ranging in power from 200 W to 600 W provide users the flexibility to test a wide range of power sources from multi-output AC/DC power supplies to batteries, fuel cells, and photovoltaic arrays. The mainframe extension has four slots that can be configured with any assortment of the modules up to 4800 W total with extension. The high-performance electronic load module of the MDL002-220V is capable of operating in constant current (CC), constant voltage (CV), constant resistance (CR), constant power (CW), and constant impedance (CZ) mode, which uses DSP technology to simulate non-linear loads and realistic loading behavior. All panel operation and programming functions are carried out on the MDL001 mainframe panel. A wide range of dynamic loading applications can be simulated through user-programmable slew rates, load levels, duration, and conducting voltage.