SPECIFICATIONS
Part No.: IS200ECTBG2ADE
Manufacturer: General Electric
Country of Manufacture: United States of America (USA)
Technology: Surface-mount
Operating temperature: -30 to 65oC
Product Type: Exciter Contact Terminal Board
Availability: In Stock
Series: EX2100
Functional Description
IS200ECTBG2ADE is an Exciter Contact Terminal Board developed by GE. It is a part of EX2100 excitation system. It facilitates the interface between the EX2100 controller and external contact I/O circuits, enabling system-level protection and auxiliary functionality within a simplex control architecture. This board is specifically designated for use in simplex excitation configurations, as opposed to the ECTBG1 variant, which is designed for redundant control systems.
The ECTB board plays a critical role in managing and monitoring trip logic, lockout operations, and auxiliary inputs for excitation protection and control. It acts as a terminal interface for control relays and dry contacts, transmitting and receiving logic-level signals between field devices and the EX2100 control hardware.
Key functions include:
- Providing trip outputs to trigger customer lockout relays.
- Generating general-purpose Form-C (SPDT) relay outputs.
- Monitoring auxiliary dry contacts that report breaker and protection statuses.
- Delivering 70 VDC wetted logic to contact inputs, ensuring consistent detection.
Features and Capabilities
- 1. Trip Output Circuits: The board provides two trip outputs, which are used to drive a customer lockout relay or similar critical protection function. These outputs are controlled by the EMIO (Exciter Main I/O) board, which determines the trip condition based on system logic. The trip signals are dry contact relay outputs, electrically isolated and capable of interfacing directly with high-reliability protective relays.
- 2. Form-C Contact Outputs: Four Form-C (single-pole double-throw) contact outputs are available. Each output can be independently controlled by the EMIO board to perform user-defined functions, such as annunciation, interlocking, or external device activation. Contact ratings are typically suitable for low- to medium-power signaling circuits.
- 3. Auxiliary Contact Inputs: The board supports six auxiliary digital inputs, powered (wetted) using a 70 VDC supply sourced from within the EX2100 system. These inputs are intended for status signals such as breaker open/close (52G), lockout relay status (86G), and other customer-defined status points. The wetted input scheme ensures reliable contact monitoring and reduces susceptibility to noise and contact bounce.
- 4. Breaker Status Inputs: Dedicated monitoring is provided for
- 52G (Generator Breaker) – Indicates the open/close state of the generator breaker.
- 86G (Lockout Relay) – Indicates whether the generator lockout condition is active.
- Like the auxiliary inputs, these contacts are also wetted with 70 VDC and monitored for changes in state.
System Integration Considerations
- It connects directly to the EMIO board using a ribbon or cable interface and relays I/O logic back to the system controller.
- It is designed for use in simplex (non-redundant) EX2100 systems only. For redundant configurations, the ECTBG1 variant must be used instead.
- In simplex systems, power for the ECTB board comes from the single controller (M1), whereas redundant configurations draw power from both M1 and M2 to ensure continuous operation in the event of a controller failure.
Electrical Characteristics
- Input Voltage (wetted contacts): 70 VDC (internally sourced)
- Contact Type: Form-C relay outputs; dry-contact inputs
- Isolation: Contact outputs are electrically isolated from control logic
- Wiring: Screw-terminal blocks for field wiring, with internal routing to signal conditioning circuits and output relays
Contact Inputs
- In both simplex and redundant configurations, the use of contact inputs is largely the same; however, in redundant systems, these inputs are distributed (fanned out) to all three controllers M1, M2, and C whereas in simplex systems, only the M1 controller is connected. The board supports six auxiliary contact inputs supplied by the customer, each powered with a 70 V DC wetting voltage sourced through plugs J13M1 and J13M2.
- This voltage, resistor-isolated, typically ranges between 63 and 84 V DC. The ECTB monitors the state of each contact and provides feedback via red status LEDs, while simultaneously transmitting the input signals to the connected controllers. Additionally, individual inputs for the 52G (generator breaker) and 86G (lockout relay) contacts are monitored in the same manner, using the same wetting voltage and signaling mechanism to ensure real-time feedback to the system.
The WOC team is always available to help you with your EX2100 requirements. For more information, please contact WOC.
Frequently Asked Questions
What is IS200ECTBG2ADE?
It is an Exciter Contact Terminal Board developed by GE under the EX2100 series.
How many auxiliary contact inputs are supported?
The board supports six customer-supplied auxiliary contact inputs, each monitored using a 70 V DC wetting voltage.
What is the source and range of the wetting voltage for contact inputs?
The wetting voltage is nominally 70 V DC, sourced from plugs J13M1 and J13M2, and is resistor-isolated. The voltage may vary between 63 V and 84 V DC.
