GE IS200ERDDH1A IS200ERDDH1ABB Exciter Relay Driver

The IS200ERDDH1A IS200ERDDH1ABB functions as an exciter relay driver board for turbines. This printed circuit board belongs to the Mark VI Speedtronic series from General Electric. The IS200ERDDH1A serves as the standard version for relay driver control. Its variant, the IS200ERDDH1ABB, includes a conformal coating for enhanced circuit protection. Both boards drive excitation relay signals for steam and gas turbine generators.

Core Technical Specifications

This board provides multiple relay driver channels for exciter control. You will also find status feedback inputs for each relay channel. The board stores minimal energy but uses capacitors for coil suppression. Meanwhile, the backplane interface handles all power and data transfers.

Parameter	Specification
Full Model No.	IS200ERDDH1A IS200ERDDH1ABB
Manufacturer	GE Industrial Systems (General Electric)
Series	Mark VI Speedtronic
Board Category	Circuit Board (Exciter Relay Driver)
Weight	Approximately 0.33 kg
Dimensions (H x W x D)	6.0 cm x 23.0 cm x 3.0 cm
Relay Driver Channels	8 independent relay driver channels
Feedback Input Channels	8 status feedback inputs
Driver Output Voltage	24 VDC or 125 VDC
Coil Suppression	Built-in flyback diodes per channel
Terminal Type	Screw terminal connectors
Backplane Interface	VME compatible
Energy Storage	Small capacitors for transient suppression
Coating (for ABB)	Conformal coated against moisture and dust

Installation and System Integration

Install the IS200ERDDH1A IS200ERDDH1ABB into any standard VME rack slot. The board connects directly to excitation relays through its screw terminals. Meanwhile, the backplane supplies power and communication to the board. Therefore, proper insertion ensures reliable relay driver performance.