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SPECIFICATIONS:
Part Number: IS200ECTBG2ADE
Manufacturer: General Electric
Series: EX2100
Function: Exciter Contact Terminal Board
Relay Break Characteristic: 28 V dc
Operational Mode: Simplex mode only
Customer Power: 125 V dc
Relay Control Voltage: 24 V DC
Wetting Voltage: 70 V DC
Weight: 0.34 kg
Dimensions: 150 x 76 x 90 mm
Availability: In Stock
Country/Region of Manufacture: United States
Manual: GEI-100457A
FUNCTIONAL DESCRIPTION:
IS200ECTBG2ADE is an Exciter Contact Terminal Board manufactured by General Electric as part of the EX2100 series used in the Excitation control system. The ECTBG2ADE terminal board supports excitation contact outputs and inputs in the EX2100 Excitation Control. There are two versions ECTBG2ADE board is used only for redundant control, and the ECTBG2 board is used only for simplex control. Each board contains two trip outputs driving a customer lockout, controlled by the EMIO board. There are also four general-purpose Form-C contact outputs controlled by the EMIO board. Six auxiliary contact inputs are powered (wetted) with 70 V dc and monitored by ECTBG2ADE. Also, the 52G and 86 G contact inputs are powered with 70 V dc and monitored. In the redundant control, power comes from both the M1 and M2 controllers
TRIP RELAY OUTPUTS (SIMPLEX/REDUNDANT):
ECTBG2, driven by the EMIO in M1, controls two trip relays normally used as customer lockout drivers. The relay drivers are powered by 24 V dc from the M1 controller. Refer to the previous figure, ECTBG2 Terminal Board, Simplex. Each customer lockout is driven by one relay using two parallel normally closed contacts. On the board, the relays are designated K1M1 and K2M1. For redundant control operation with ECTBG1, the three inputs drive three relays that control a 2-out-of-3 contact voting circuit.
CONTACT INPUTS:
Contact input uses are similar in the simplex and redundant cases; however, the inputs are fanned to the M1, M2, and C controllers for redundant control. In simplex control, only the M1 controller is connected. Six customer-supplied auxiliary contact inputs are powered and monitored by ECTB using 70 V dc from plugs J13M1 and J13M2. The resistors are isolated and supplied to the contacts. The wetting voltage can vary from 63 to 84 V dc. The state of the contact is monitored. The resulting signal drives a red-indicating LED and fans out to M1, M2, and C. One contact from 52G is monitored using the 70 V dc excitation in the same way as the auxiliary inputs. The status is indicated with a red LED. One contact from 86G is wetted with a nominal 70 V dc as above. The state of the contact is monitored by controllers M1, M2, and C.
APPLICATION DATA:
K1 and K2 are the trip relays in controllers M1, M2, and C. K1GP through K4GP are the general-purpose relays. Terminal blocks TB1 and TB2 are held down with two screws and can be removed. Three 25-pin sub-D connectors, J405, J408, and J415, are for cables to the EBKP backplane for connection to the EMIO boards M1, M2, and C. Plugs J13M1 and J13M2 bring in 70 V dc for contact wetting from the M1 and M2 power supplies.
WOC maintains one of the largest and most comprehensive inventories of GE Excitation Control System replacement parts, enabling us to support urgent and long-term operational needs across a wide range of industries. In addition to supplying parts, we offer expert repair services for faulty boards, as well as unused and fully rebuilt units, all thoroughly tested and backed by a dependable warranty for complete peace of mind.
Our team of highly experienced automation and OEM specialists is available 24/7 to provide technical assistance, troubleshooting guidance, and sourcing support. Whether you need a direct replacement, a reliable repair solution, or expert advice on system compatibility, WOC is committed to delivering fast, accurate, and cost-effective solutions. For pricing, availability, or technical consultation on parts and repair services, please contact our team by phone or email. We’re always ready to support your automation requirements and help minimize downtime.
What is IS200ECTBG2ADE?
IS200ECTBG2ADE is an Exciter Contact Terminal Board manufactured by General Electric for the EX2100 excitation control system. It is designed to manage excitation-related contact inputs and outputs, including trip relays and auxiliary contacts. The board plays a critical role in monitoring and controlling excitation system status signals.
What voltage levels does the Exciter Contact Terminal Board support?
The board supports multiple voltage levels depending on the function. Relay control typically uses 24 V dc, while customer power may be 125 V dc. Contact wetting voltage usually ranges from 63 to 84 V dc. Correct voltage compatibility is essential for safe operation.
How does the board handle voltage transients from generator excitation?
The board is designed to tolerate short-duration voltage transients from generator field circuits. Input contacts are isolated through series resistors, and relays have inherent contact protection. Wetting voltage is regulated to prevent false input detection during transients. Transient suppression is mainly handled by the controller and external surge protection.
