Description

GE IS200STTCH2A Thermocouple Input Terminal Board

The GE IS200STTCH2A, also cataloged as the IS200STTC Thermocouple Input Terminal Board, operates as a dedicated hardware component for thermocouple signal termination and temperature measurement interface within the GE Mark VI/Mark VIe Speedtronic turbine control system. The board receives field thermocouple signals and provides cold junction compensation for temperature data processing.

Hardware Specifications

Parameter	Specification
Model	IS200STTCH2A
Brand	GE
Origin	USA
Product Type	DIN Rail Thermocouple Board
System Compatibility	Mark VI / Mark VIe Speedtronic
Board Type	Simplex Thermocouple Input Terminal Board
Input Channels	24 isolated thermocouple inputs
Supported Thermocouple Types	J, K, T, E, R, S, B
Signal Range	-8 mV to +45 mV
Cold Junction Compensation	On-board CJC sensor
Field Interface	48 screw terminals
Processor Interface	37-pin D-sub connector (JH1)
Isolation	Channel-to-channel opto-isolation
Filtering	RC filtering and 50/60 Hz notch filtering
Mounting	35 mm DIN rail
Weight	0.7 kg
Operating Temp	-20 to +65 deg C

Cold Junction Compensation and Temperature Signal Processing

The IS200STTCH2A provides thermocouple signal interface functions for GE Mark VI/Mark VIe turbine control architectures. The board performs field termination, signal conditioning, and cold junction compensation (CJC) before transferring temperature measurement signals to STCC control boards or PAICH1A analog input packs.

The module supports channel-to-channel isolation for thermocouple inputs, reducing interference between independent temperature measurement circuits. RC filtering and frequency rejection functions are applied to minimize noise coupling from industrial electrical environments.

The simplex STTC architecture provides direct signal routing for temperature monitoring applications. The board integrates with GE industrial control platforms through dedicated terminal connections and supports temperature input density scaling through 24 independent thermocouple channels.

Frequently Asked Questions

Q: What thermocouple types are supported by the IS200STTCH2A?
A: The board supports J, K, T, E, R, S, and B thermocouple input types through software-configured temperature measurement channels.

Q: What function does the CJC circuit perform on the IS200STTCH2A?
A: The cold junction compensation circuit measures terminal reference conditions and compensates thermocouple voltage readings for ambient temperature effects.

Q: What mounting method is used for the IS200STTCH2A?
A: The board is designed for 35 mm DIN rail mounting within the Mark VI/Mark VIe control cabinet configuration.

Field Installation Guidelines

Install the IS200STTCH2A on the designated DIN rail location and verify terminal assignments before connecting thermocouple field wiring. Maintain correct thermocouple polarity and use compatible extension wire materials for each thermocouple type.

Route thermocouple cables separately from high-current power wiring and switching circuits. Ground cable shields according to cabinet grounding practices to reduce EMI/RFI interference. Verify connector seating, terminal torque, and channel configuration before system operation.

Specifications

• Brand: General Electric

Advantages

• High reliability in industrial environments
• Supports continuous operation
• Compatible with major PLC/DCS systems