DS3820EMMA is a Backplane Board and is part of the GE Speedtronic Mark IV gas turbine control system for industrial applications. The Mark IV system uses distributed microprocessors, which allow the turbine to run under the control of one module while another is failing, shutting down, or undergoing repair or replacement. This Mark IV system design element considerably lowers turbine system downtime, resulting in greater efficiency. Modules are designed with the most frequently used modules adjacent to the panel door for faster access and to make maintenance and switching out of these modules easier.