Product Overview
The GE IS200EXAMG1AAB is a critical component in the EX2100 excitation control system, designed to provide precise attenuation between the high-voltage bridge and the Exciter Ground Detector Module (EGDM). Manufactured by GE Industrial Systems, this board ensures reliable ground detection and field voltage monitoring in turbine control applications.
As part of the EX2100 Series, the IS200EXAMG1AAB handles ±50V low-frequency square-wave signals, making it essential for maintaining system stability and safety. Its robust design and compatibility with both simplex and redundant configurations make it a versatile choice for modern power generation facilities.
Technical Specifications
| Parameter |
Value |
| Part Number |
IS200EXAMG1AAB |
| Manufacturer |
GE Industrial Systems |
| Series |
EX2100 |
| Functional Acronym |
EXAM |
| Functional Description |
Exciter Attenuation Module Board |
| Board Style |
Mk VI IS200 |
| PCB Coating |
Normal Coating |
| Functional Revision 1 |
A |
| Functional Revision 2 |
A |
| Artwork Revision |
B |
| Signal Type |
±50V Low Frequency Square-Wave |
| Redundant/Simplex |
Both |
| Associated Board |
EGDM |
| Group Variation |
H2, Dual System |
| Number of Channels |
13 |
| Description |
I/O Terminal Board |
| AC Input Frequency |
480 Hz maximum |
| Ambient Temperature |
0 to 40°C |
| Functionality |
Field Current and Voltage Feedback |
| Number of Selector Settings |
8 |
| Control Sections |
Up to Three Redundant Control Sections |
| Operating System |
Dual System |
| Country of Manufacture |
United States (USA) |
| Manual |
GEI-100509B |
Functional Overview
The IS200EXAMG1AAB works in tandem with the EGDM to form the ground detection system for the EX2100 Excitation Control. It reduces high bridge voltage to a manageable level and provides attenuation between the field bus and the EGDM. The module is installed in the High Voltage Interface (HVI) module within the auxiliary cabinet.
Connected via the Exciter Power Backplane (EPBP), the EXAM uses a single 9-pin cable, while EGDMs connect through a 96-pin P2 connector. This setup supports both simplex and triple modular redundant (TMR) configurations, requiring only one EXAM regardless of redundancy level.
Key Functions and Integration
The EGDM controls a relay on the EXAM for field ground testing and master selection. This relay features a 24 V DC coil with diode suppression and operates with less than 20 mA. In default state, the relay remains de-energized, providing feedback to the M1 section (or sole control in simplex); when energized, it sends feedback to M2.
In TMR setups, three EGDMs are configured as Controller (C), Master 1 (M1), and Master 2 (M2). The DSPX board informs EGDM C which master supplies the 50 V AC square-wave signal to the sense resistor in the EXAM. This allows precise monitoring and alarming through a fiber-optic link to the EX2100E controller.
Installation and Setup
When installing the IS200EXAMG1AAB, ensure the board is properly seated in the HVI module. Verify jumper settings JP1 and JP2 for filter capacitance based on PPT voltage levels:
- PPT voltages less than 750 V rms
- PPT voltages greater than 750 V rms
Confirm all cable connections, especially the 9-pin cable to the EPBP, and ensure the ambient temperature remains within 0 to 40°C for optimal performance.
Maintenance and Reliability
Routine inspection of the IS200EXAMG1AAB is recommended to ensure reliable operation. Check for signs of wear on connectors and PCB coating integrity. Given its role in ground detection, any failure could compromise system safety, so periodic testing is advised.
The board's dual-system capability and support for up to three redundant control sections enhance overall reliability, minimizing downtime in critical turbine applications.
Buying Guide
When purchasing the IS200EXAMG1AAB, verify the part number matches your system requirements and confirm compatibility with your EX2100 configuration. Ensure you have the necessary accessories, such as the EPBP and EGDM modules, for full integration.
PLC Source PRO offers this module in stock, backed by fast shipping and expert support. Contact us to confirm availability and ensure you get the right part for your application.