The National Instruments RMX-4002 DC Electronic Load Device Mainframe is designed to accommodate up to four Electronic Load Device modules, offering versatile channel capabilities and multiple operating modes. This mainframe, part of the RMX-400x Series, features independent isolated channels that ensure efficient management of varying load configurations. With a high resolution of 5 digits and an impressive slew rate, the RMX-4002 provides rapid response times essential for demanding applications. It supports connectivity through RS-232C, USB, and LAN ports, allowing for extensive integration into existing systems. The unit is also geared for rack mount installation, facilitating high-capacity setups while maintaining flexibility in operation. A user-friendly multi-colored LCD presents critical information clearly, and the mainframe supports up to 120 programmable sequences along with USB flash drive functionality for added convenience. While National Instruments has announced the RMX-4002 as obsolete, it remains available for purchase and repair through Apex Waves. For detailed operational guidance, a user manual and maintenance manual are accessible for download.