IS400TCASH1A | GE Mark VIe Core Analog I/O Terminal Board

GE IS400TCASH1A Mark VIe Core Analog I/O Terminal Board — 12-Channel, 125VDC, PCAA

The IS400TCASH1A is a Core Analog I/O Terminal Board for GE's Mark VIe turbine control platform. It serves as the field wiring interface for the PCAA (Core Analog) I/O module, receiving and conditioning analog signals from turbine sensors and actuators. The board provides 12 analog input channels with high-resolution signal processing, eliminating the need for interposing instrumentation in power generation and industrial infrastructure systems.

Key Specifications

• Manufacturer: General Electric / GE Vernova
• Series: Mark VIe / Speedtronic
• Type: Core Analog (PCAA) Module Terminal Board
• Analog Inputs: 12 channels
• Power Supply Voltage: 125 VDC
• Operating Temperature: -30°C to +65°C
• Compatibility: GE Excitation Gas Turbine Control; Mark VIe PCAA I/O module
• Function: Field signal reception and conditioning for analog I/O
• Technology: High-resolution analog signal processing
• Status: Active / In production

Architecture & Connectivity

• I/O Module Pairing: Connects to Mark VIe PCAA (Core Analog) I/O pack
• Signal Types: Analog inputs from turbine sensors (pressure, temperature, flow, etc.)
• Communication: Direct interface to turbine sensors and actuators via Ethernet-capable Mark VIe control network
• Redundancy: Supports Mark VIe TMR (Triple Modular Redundancy) architecture when paired with redundant PCAA modules
• Accessory Boards: Compatible with IS400STAIH1A/IS400STAIH2A analog input terminal boards

Installation Guide

1. Power off the Mark VIe system before installation.
2. Mount the IS400TCASH1A terminal board in the designated I/O rack position.
3. Connect field analog sensor wiring to the terminal blocks (typically 12–24 AWG).
4. Connect the board to the PCAA I/O pack via the backplane connector.
5. Verify 125 VDC power supply connection for field-side circuits.
6. Power on and verify signal integrity via Mark VIe ToolboxST diagnostics.
7. Calibrate analog input channels as required for your specific turbine application.

FAQ

Q: What is the difference between IS400TCASH1A and IS200TCASH1A?
A: IS400TCASH1A is the RoHS-compliant / updated version of the IS200TCASH1A for Mark VIe systems. Both serve the same PCAA terminal board function, but IS400 series meets newer environmental standards.

Q: What does the H1A suffix mean?
A: "H1" indicates the hardware revision / functional variant. "A" is the primary revision level. Variants like H1AFD and H1AGD are factory-installed component or coating revisions that remain functionally compatible.

Q: Is this board compatible with Mark VI systems?
A: No. IS400TCASH1A is designed for Mark VIe systems. Mark VI uses IS200 series terminal boards (e.g., IS200TCASH1A).

Q: What types of analog signals can it handle?
A: The PCAA module paired with IS400TCASH1A typically handles 4–20 mA, 0–10 VDC, RTD, and thermocouple inputs depending on the specific I/O pack configuration. Verify with your turbine I/O list.

Q: Does it require external power?
A: The terminal board itself is passive, but the associated PCAA I/O pack requires 125 VDC for field-side power distribution.

Selection Tips

• Mark VIe, PCAA analog I/O, 12 channels: IS400TCASH1A
• Mark VI, PCAA analog I/O: IS200TCASH1A
• Always verify: System generation (Mark VI vs VIe), PCAA I/O pack part number, and analog signal types before ordering
• Order compatible terminal boards: IS400STAIH1A/IS400STAIH2A for specific analog input configurations
• Check RoHS compliance: IS400 series meets current environmental standards; IS200 series may not