DS3820C12AK21C Mark IV GE Speedtronic Current Isolator
The DS3820C12AK21C is a GE Mark IV component created as part of the Speedtronic system. The Mark IV was designed for the management of gas and steam turbines and was one of the first management systems from GE to offer TMR (triple modular redundant) fault-tolerant control. This type of control improves uptime and minimizes issues caused by faulty hardware. GE Mark IV components can be purchased from AX Control as reconditioned used parts or as liquidated never-used stock. We are also happy to quote the cost to repair your current component.
The DS3820C12AK21C functions as a Current Isolator Module. Its job is to switch incoming current from DC to AC. It can also provide isolation between the line voltage side and the control side. The module is composed of two major parts. This includes an internal circuit board surrounded by an external, protective box. The box component is hinged on its left front edge to allow the front panel to swing open. The rear panel includes extending flanges that give users two options for mounting. A flat surface is recommended. Multiple warnings are noted on the front cover of the unit. Handling and safety procedures as recommended by the manufacturer should be followed at all times.
The internal component of the DS3820C12AK21C is a DS3800NCIB board. This is screw-mounted to the back panel of the above-described box via four pre-drilled holes located in each corner of the board. The board is populated by various capacitors, diodes, and resistors, including one that is mounted on a quick-connect screw mount. The board also uses connectors like a stab-on ground connector, two vertical pin (male) connectors, a ribbon cable, and a three-screw terminal strip. Other board components include an isolation amplifier, transistors, integrated circuits, and potentiometers. More detailed information about the use or installation of this unit may be found through GE datasheets or user guides.