The IS420UCSBH3A is one of a number of controllers designed by GE for its Mark IVe Speedtronic system. The Mark VIe was the last Speedtronic system released by GE for managing industrial turbine systems. It is one of five UCSB controller modules available.

The IS420UCSBH3A is built on a quad-core processor with application software pre-installed. The processor uses the QNX Neutrino operating system and is designed to provide real-time, high-speed, reliable operations. This is a 1200 MHz Intel EP80579 microprocessor with 256 MB of SDRAM memory. The unit weighs 2.9 pounds before shipping materials are added.

The IS420UCSBH3A should be installed to allow continuous vertical airflow through its heat sink. These should be kept unobstructed. Typically, the controller is mounted on a panel metal plate.

The IS420UCSBH3A provides multiple leds on its front panel for diagnostic purposes. This includes links and active leds to indicate that correct Ethernet links have been established or ports with low traffic. There is also a power LED, a boot LED, an online LED, a flash LED, a DC LED, and a diagnostic LED. There is also an On and OT LED. The OT LED will indicate if an overheating state is present

IS420UCSBH3A