DS4820B1SA

Product Description

The DS4820B1SA is a backplane designed to fit into GE’s Mark IV system. Although the first Speedtronic system was introduced by GE in 1968, the Mark IV was a significant technological step forward over those earlier systems.  The MKIV introduced the idea of distributing control functions across multiple powerful platforms that run simultaneously to monitor all critical controls and protection parameters of the turbine system, using two-out-of-three voting to make important decisions.    All critical outputs--for example, a trip command--will be issued from the system only if two or all three of the computers indicate this status. If only one indicates a trip, the turbine will continue to run. In this way, the Mark IV has minimized the overall turbine outage rate.

The DS4820B1SA consists of a metal housing with multiple circuits.  The housing is built with several flanges with tabs and screw mounts designed to attach to other components.  The top of the unit is open.

Speedtronic backplanes were designed to replace variable wiring modules.  Printed wiring backplanes tend to be more reliable, and have the added benefit of minimizing the number of parts needed.  Backplanes connect several circuit boards together to make up a complete computer system.

AX Control will ship the DS4820B1SA to you in a protective, plastic, static reducing covering.  The team at AX Control suggests you review any manufacturer-provided instructions before attempting installation.   Technical support for all Speedtronic Mark IV components, including the DS4820B1SA was originally provided by General Electric.  This includes all end-user publications, such as manuals and datasheets.

If you have questions about any of the programs AX Control offers, such as our exchange, service, and warranties, please don’t hesitate to contact our team by phone or email.  We’re here to help.