GE IS200EISBH1A IS200EISBH1AAA | Exciter ISBus Board

Central Communication Hub for GE Excitation Systems

The GE IS200EISBH1A IS200EISBH1AAA manages data flow within the EX2100 exciter rack. This board belongs to the Mark VI series from General Electric. It acts as the ISBus interface for multiple control cards. Therefore, it ensures reliable communication between the regulator and firing circuits.

Physical Dimensions and Mounting Specifications

This ISBus board measures 14 cm in width, 11 cm in height, and 2.5 cm in depth. The GE IS200EISBH1A IS200EISBH1AAA weighs approximately 0.22 kg, which allows easy rack installation. Its compact single-board design fits into any standard Mark VI slot. Consequently, you can replace it without removing adjacent modules.

Connector Layout and Component Configuration

The GE IS200EISBH1A IS200EISBH1AAA provides two 20-pin ISBus header connectors for backplane communication. It also features one 6-pin debug port for diagnostic access. This board contains four bus transceiver chips for signal buffering. Additionally, it includes two small energy storage capacitors for transient protection.

Technical Parameter	Specification
Full Model Name	GE IS200EISBH1A IS200EISBH1AAA
Manufacturer	General Electric (GE)
Series	Mark VI / EX2100
Product Category	Exciter ISBus Board
Weight	0.22 kg (0.49 lbs)
Dimensions (W x H x D)	140 mm x 110 mm x 25 mm
ISBus Connectors	2 x 20-pin header
Debug Interface	1 x 6-pin port
Bus Transceivers	4 chips
Energy Storage	2 capacitors (220 µF each)
Operating Voltage	5 VDC / 3.3 VDC dual supply
Data Rate	10 Mbps maximum
Operating Temperature	–20°C to +60°C

Energy Storage and Signal Integrity

The GE IS200EISBH1A IS200EISBH1AAA stores minimal but critical energy for bus stability. Its two capacitors provide 440 µF of total capacitance. This storage filters out high-frequency noise on the ISBus lines. As a result, all connected boards receive clean digital signals without corruption.

Role Within the EX2100 Excitation Rack

You will typically find the GE IS200EISBH1A IS200EISBH1AAA in the central slot of the EX2100 chassis. It bridges the main regulator board to the bridge firing cards. Furthermore, this module supports daisy-chaining of up to 12 additional ISBus nodes. Its buffered architecture prevents signal degradation over longer backplane distances.

Installation and Diagnostic Access

Use the GE IS200EISBH1A IS200EISBH1AAA as a direct replacement for older EISB revisions. Always power down the entire rack before handling this board. The debug port connects to a standard JTAG programmer. This interface allows you to monitor bus traffic in real time. Simply slide the board into its guided slot and lock the ejector tabs.