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SPECIFICATIONS:
Part Number: IS200TBQGH1A
Manufacturer: General Electric
Series: Mark VIe
Product Type: Thermocouple Terminal Board
Connectors: 60
Jumpers: J1-J4
Vertical pins: JUUR, JUUS, and JUUT
MOV: MV29 - MV36
Power supply voltage: 28 V dc
Voltage Range: 14 to 32 V dc
LVDT excitation output: 3.2 �0.2 kHz
Outputs: 24 V dc
Mounting: DIN-rail mounting
Technology: Surface mount
Operating temperature: -30 to 65�C
Size: 33.02 cm high x 17.8 cm
Repair: 3-7 Days
Availability: In Stock
Weight: 2 lbs
Country of Origin: United States
Manual: GEH-6721
FUNCTIONAL DESCRIPTION:
IS200TBQGH1A is a Thermocouple Terminal Board manufactured and designed by General Electric as part of the Mark VIe Series used in Distributed turbine control systems. The board serves as a signal termination and routing platform that allows field wiring from sensors, actuators, and control devices to be securely connected and transmitted to the appropriate control modules. By organizing multiple signal paths through dedicated terminal points and connectors, the board ensures reliable signal distribution within the turbine control cabinet.
The board incorporates several protective and conditioning components, such as metal oxide varistors (MOVs), resistors, diodes, and ferrite beads, to safeguard the control circuitry from voltage transients, electromagnetic interference (EMI), and electrical noise commonly present in industrial environments. It also features multiple jumper configurations that allow system engineers to customize signal routing and grounding configurations according to system requirements. Through these features, the IS200TBQGH1A helps maintain signal integrity, system reliability, and safe operation within the turbine control system architecture.
INSTALLATION:
The board should be positioned in the assigned slot or mounting location that aligns with the associated I/O modules and system wiring layout specified in the control system documentation. During installation, field wiring from sensors, actuators, and external devices is connected to the screw-type terminal blocks provided on the board. Each terminal should be wired according to the system wiring diagrams to ensure proper signal routing and grounding configuration. Care should be taken to maintain proper cable management, shielding, and separation of signal and power cables to minimize electromagnetic interference. Once the wiring connections and jumper configurations are verified, the board can be integrated with the control system connectors and tested to confirm proper communication and signal transmission within the turbine control system.
SIGNAL ROUTING AND INTERFACE DESIGN:
Field wiring from sensors, switches, and actuator feedback devices is terminated on the board�s screw-type terminal blocks, which provide organized connection points for signal entry and distribution. From these terminals, the signals are internally routed through PCB traces to dedicated connector interfaces that link directly with the associated control system modules. This architecture ensures efficient signal transfer while maintaining electrical isolation and proper grounding paths within the control cabinet.
To maintain reliable communication between field devices and the control processor, the board integrates signal conditioning and protection components such as resistors, diodes, and metal oxide varistors (MOVs). These components help regulate signal flow, suppress transient voltage spikes, and minimize the impact of electromagnetic interference. Additionally, ferrite components and filtering elements are incorporated to maintain signal integrity and reduce noise propagation across the interface.
SIGNAL INTEGRITY AND ELECTROMAGNETIC INTERFERENCE (EMI) PROTECTION:
Field signals entering the board pass through carefully designed PCB traces and protective components that help minimize signal distortion and maintain accurate data transmission between field instrumentation and the control system. The board incorporates ferrite beads, resistive elements, and filtering circuits that suppress high-frequency noise and prevent unwanted signal oscillations that could interfere with control logic or monitoring functions.
To further protect the system from electrical disturbances, the board utilizes metal oxide varistors (MOVs) and diode-based protection circuits to absorb transient voltage spikes and electrical surges generated by inductive loads, switching operations, or nearby power equipment. These protective elements clamp excessive voltages and dissipate surge energy before it reaches sensitive control electronics. In addition, proper grounding paths and terminal configurations are implemented to reduce electromagnetic coupling and ensure stable reference potentials across connected devices.
WOC maintains the largest inventory of GE Distributed Control System (DCS) replacement parts, offering immediate access to critical components as well as expert repair services for faulty boards, restoring them to full operational condition with precision and reliability. We provide both unused and professionally rebuilt components, each backed by a comprehensive warranty, and our team of highly trained engineers and technicians is available 24/7 to support all OEM and automation needs, ensuring minimal downtime. Committed to the full lifecycle of your automation systems, we handle everything from sourcing replacement parts to troubleshooting, repair, and guidance on system upgrades, while offering fast, dependable solutions. Contact our team by phone or email for pricing, availability, or technical consultation.
What is IS200TBQGH1A?
It is a high-reliability Thermocouple Terminal Board from General Electric�s Mark VIe Series, designed for use in distributed turbine control systems. It serves as a signal termination and routing platform, connecting field devices such as sensors, actuators, and thermocouples to the control system modules while maintaining signal integrity.
What types of thermocouples are compatible with the IS200TBQGH1A?
It supports standard turbine thermocouple types, including Type K, J, and R. Compatibility depends on the I/O module configuration and proper calibration within the Mark VIe system. Signal integrity is maintained by ensuring the correct thermocouple type matches the board�s input configuration and jumper settings. Mismatched thermocouples can lead to measurement errors or calibration drift over time.
What role do the MOVs (MV29�MV36) play on the board?
MOVs protect sensitive electronics by clamping excessive voltages and dissipating transient energy before it reaches the control system. They respond to high-energy surges caused by inductive loads, switching events, or nearby electrical equipment. By limiting voltage spikes, MOVs prevent damage to PCB traces, connectors, and I/O modules. This enhances overall system reliability and reduces downtime.
How are jumper configurations (J1�J4) used for signal routing?
Jumpers allow customization of signal paths and grounding schemes according to specific system requirements. Engineers can isolate or combine signal groups, optimize grounding, and configure routing for different sensor or actuator types. This flexibility ensures that thermocouple signals are accurately transmitted while minimizing crosstalk. Correct jumper settings are critical for maintaining signal integrity across all connected devices.
