The Core Analog I/O Terminal Board is a standard Mark VIe TCAS-type terminal board, designed as the front-end wiring and signal conditioning interface for PCAA analog I/O modules.
It provides reliable termination, isolation, and conditioning for field analog signals while fully supporting the fault-tolerant and redundant architecture of the Mark VIe control system.

2. System Compatibility

Control system: GE Mark VIe

Compatible terminal board types: TCAS, PCAA

Compatible I/O modules:

IS230PCAAH1A

IS230PCAAH1B

Other Mark VIe PCAA-series modules

3. Channel Configuration

Total channels:

10 basic analog channels (TCAS standard configuration)

4. Supported Signal Types

Current input: 4–20 mA

Voltage input: ±5 V, ±10 V

Thermocouples:

J / K / T and other standard types

Integrated cold-junction compensation for thermocouple measurement

5. Electrical Characteristics

Power supply: 28 VDC (supplied by PCAA module)

Channel isolation:

Electrical isolation between channels

Isolation rating: 1500 Vrms

Designed to enhance noise immunity and system anti-interference capability

6. Communication and Diagnostics

Onboard identification (ID) chip:

Automatic terminal board recognition

Supports channel-level fault diagnosis

Seamless integration with Mark VIe diagnostics and maintenance tools

7. Redundancy and Reliability

Fully supports TMR (Triple Modular Redundancy)

Compatible with Mark VIe fault-tolerant architecture

Suitable for redundant I/O configurations in high-availability systems

8. Mechanical and Installation Specifications

Wiring terminals:

High-density Euro-block terminal connectors

Installation method:

DIN-rail mounting

Secured with metal fixing bracket

Dimensions: approx. 15 cm × 10 cm × 5 cm

Weight: approx. 0.6 kg

9. Environmental and Protection Characteristics

Operating temperature: −30 ℃ to +65 ℃

Protection class: IP20 (cabinet installation)

Conformal coating:

Moisture-resistant

Dirt- and pollution-resistant

Designed for harsh industrial environments

10. Key Functions

Provides front-end access for field analog signals such as:

Temperature

Pressure

Flow

Performs thermocouple cold-junction compensation

Supplies stable power and electrical isolation to the PCAA module

Ensures high accuracy of signal acquisition and robust EMC performance

11. Typical Applications

Gas turbine control systems

Steam turbine control systems

Large compressor control and monitoring

Acquisition of non-critical parameters

Basic analog control loops

Complements TCAT extended terminal boards to satisfy diverse signal processing requirements

GE IS400TCASH1AGD｜Analog Module Terminal Board｜