GE IS200ECTBG2A Exciter Contact Terminal Board

The GE IS200ECTBG2A is an Exciter Contact Terminal Board (ECTB) from General Electric. This board belongs to the EX2100 series for excitation control systems. The manufacturer designed this board specifically for simplex mode operation only. Therefore, it supports both excitation contact outputs and contact inputs. The United States manufactures this board, ensuring high-quality construction for generator excitation control.

Functional Overview of the IS200ECTBG2A

First, the GE IS200ECTBG2A serves as a critical interface between the EMIO board and field contacts. The board integrates trip contact outputs, general-purpose relay outputs, and contact inputs. The EMIO board manages this ECTB model along with other I/O terminal boards like EXTB, EACF, and EPCT. Consequently, the EMIO board collects all input and output signals. Then, it sends these signals as logic level gate pulse signals over the backplane to the ESEL board. For this reason, this board plays a vital role in the EX2100 excitation control system architecture.

Technical Specifications of the IS200ECTBG2A

General Specifications

Regarding basic specifications, the GE IS200ECTBG2A features a relay break characteristic of 28 V dc. The operational mode is simplex mode only, unlike the G1 version for redundant applications. Customer power requires 125 V dc. The relay control voltage is 24 V DC. The wetting voltage is 70 V DC for powering contact inputs.

Physical Specifications

The GE IS200ECTBG2A weighs only 0.34 kg, making it easy to handle. Its dimensions measure 150 x 76 x 90 mm. The board version is ECTBG2 (G2 version), with ECTB as its functional acronym. Reference manuals include GEI-100457A and GEH-6632 for installation guidance.

Trip Relay Outputs (Simplex Mode)

For trip relay functionality, the GE IS200ECTBG2A contains two trip contact outputs. These normally serve as customer lockout drivers. The M1 controller provides 24 V dc power to these relay drivers. Each customer lockout uses one relay with two parallel normally closed contacts. On the board, you will find these relays designated as K1M1 and K2M1.

General Purpose Relay Outputs

The GE IS200ECTBG2A controls four general-purpose relay outputs. Each relay output is a Form-C type, offering normally open, normally closed, and common terminals. Customer power (125 V dc) connects directly to these terminals. The board designates these relays as K1GP, K2GP, K3GP, and K4GP. The M1 controller provides 24 V dc power to the relay drivers.

Contact Inputs

The GE IS200ECTBG2A powers and monitors six customer-supplied auxiliary contact inputs. It uses 70 V dc from plugs J13M1 and J13M2 for this purpose, with resistor isolation for safety. The wetting voltage can range from 63 to 84 V dc. The board monitors each contact’s state and drives a red indicating LED for visual feedback. Subsequently, the signals fan out to M1, M2, and C controllers.

52G and 86G Contact Monitoring

The GE IS200ECTBG2A also monitors two critical protection contacts. First, it monitors one contact from 52G (generator breaker) using 70 V dc excitation. A red LED indicates the status of this contact. Second, it wets one contact from 86G (lockout relay) with a nominal 70 V dc. Controllers M1, M2, and C all monitor the state of this contact.

Connectors and Interfaces

Terminal Blocks and Connectors

Removable terminal blocks TB1 and TB2 simplify field wiring, as two screws secure each block. Three 25-pin sub-D connectors (J405, J408, and J415) connect cables to the EBKP backplane. Consequently, these connectors provide communication with the EMIO boards M1, M2, and C. Plugs J13M1 and J13M2 bring 70 V dc for contact wetting from the M1 and M2 power supplies.

Power Architecture

In simplex control, only the M1 controller connects to the GE IS200ECTBG2A. The M1 controller provides 24 V dc for relay driver power. The EPSM module supplies 70 V dc contact wetting voltage through plugs J13M1 and J13M2. Finally, customer lockout power (125 V dc) connects directly to the relay terminals.

Installation Guidelines for the IS200ECTBG2A

First, mount the GE IS200ECTBG2A in the designated EX2100 rack location. Before installation, verify that your system uses simplex mode configuration. Then, connect the three 25-pin sub-D connectors (J405, J408, J415) to the EBKP backplane for EMIO communication. Next, wire customer 125 V dc power to the relay output terminals. After that, connect 70 V dc wetting voltage from the EPSM module to plugs J13M1 and J13M2. Finally, wire field contacts to the auxiliary inputs and trip outputs as required.

Package Contents

• One (1) GE IS200ECTBG2A exciter contact terminal board

• TB1 and TB2 terminal blocks (removable, pre-installed)

Common FAQs for the IS200ECTBG2A

1. What is the operational mode of the IS200ECTBG2A?
The GE IS200ECTBG2A operates only in simplex mode. For redundant applications, use the ECTBG1 (G1 version) instead.

2. What relay outputs does this board provide?
The GE IS200ECTBG2A provides two trip contact outputs (K1M1, K2M1). It also offers four Form-C general-purpose relay outputs (K1GP through K4GP).

3. What are the power requirements for this board?
Customer power requires 125 V dc for relay outputs. Relay control voltage needs 24 V dc. Contact wetting voltage requires 70 V dc from the EPSM module.

4. How many contact inputs does the ECTBG2A monitor?
The GE IS200ECTBG2A monitors six auxiliary contact inputs. It also monitors one 52G contact and one 86G contact. Consequently, it provides comprehensive protection interface capability.

5. Which board manages the IS200ECTBG2A?
The EMIO board manages the GE IS200ECTBG2A. This board collects all inputs and outputs and sends gate pulse signals to the ESEL board over the backplane.

Why Choose the GE IS200ECTBG2A?

In summary, this exciter contact terminal board delivers reliable contact interface functionality for EX2100 simplex systems. First, the two trip relay outputs enable customer lockout driving capability. Second, the four Form-C general-purpose relay outputs offer flexible control for auxiliary circuits. Third, the six auxiliary contact inputs plus 52G and 86G monitoring provide comprehensive protection interface. Fourth, the 125 V dc customer power rating matches typical power plant auxiliary supplies. Fifth, the removable TB1 and TB2 terminal blocks simplify both field wiring and maintenance. For these reasons, order the GE IS200ECTBG2A today for your EX2100 simplex mode excitation control requirements.