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GE IS230TVBAH4A Thermocouple Input Terminal Board

The GE IS230TVBAH4A, also cataloged as the IS230TVBA Thermocouple Input Terminal Board, operates as a dedicated hardware component for thermocouple signal termination, conditioning, and temperature data acquisition within the GE Mark VIe turbine control system. The board interfaces E, J, K, S, and T thermocouple sensors with VTCC/VTUR input assemblies through filtered and compensated analog signal paths.

Hardware Specifications

Parameter	Specification
Model	IS230TVBAH4A
Brand	GE
Origin	United States
Weight	0.5 kg
Dimensions	2 x 19 x 26 cm
Operating Temp	-40 deg C to +70 deg C
Power Consumption	Not specified
Product Type	Thermocouple Input Terminal Board
System Platform	GE Mark VIe Turbine Control System
Sensor Types	E, J, K, S, T thermocouples
Input Channels	24 thermocouple inputs
Input Range	-8 mV to +45 mV
Cold-Junction Compensation	Integrated reference junctions
Accuracy	+/- 0.1% of full scale
Signal Filtering	50/60 Hz interference filtering
Mounting Method	DIN rail or chassis integration
Protection Features	Conformal coating and overvoltage protection
System Compatibility	VTCC input boards, simplex and TMR configurations

Thermocouple Signal Conditioning and Mark VIe Integration

The IS230TVBAH4A provides thermocouple termination and analog signal conditioning functions for GE Mark VIe control architectures. The board processes low-level millivolt temperature signals and transfers conditioned data to associated VTCC input modules. Integrated cold-junction compensation maintains measurement accuracy by referencing terminal temperature variations during operation.

The board supports isolated and grounded thermocouple wiring configurations across 24 input channels. Signal filtering functions reduce 50 Hz and 60 Hz electrical interference commonly present in turbine control cabinet environments.

Frequently Asked Questions

Q: What thermocouple types are supported by the IS230TVBAH4A?
A: The terminal board supports E, J, K, S, and T thermocouple inputs with a measurement range of -8 mV to +45 mV.

Q: Does the IS230TVBAH4A provide cold-junction compensation?
A: Yes. The board integrates reference junction measurement circuits for thermocouple temperature compensation.

Q: Is the IS230TVBAH4A compatible with redundant Mark VIe configurations?
A: The board supports integration with VTCC input assemblies used in simplex and triple modular redundant system configurations.

Field Installation Guidelines

Install the IS230TVBAH4A inside the designated Mark VIe control cabinet chassis or approved DIN rail mounting location. Verify thermocouple polarity before termination because reversed wiring affects temperature signal interpretation.

Use shielded thermocouple extension wiring where required by the installation environment. Connect cable shields according to cabinet grounding practices and avoid routing thermocouple cables parallel to high-current power conductors to reduce electromagnetic interference.

Confirm terminal tightness, connector seating, and compatibility with the associated VTCC input interface before system energization. Follow GE Mark VIe hardware installation documentation for cabinet layout, grounding, and signal segregation requirements.

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