1 Year Warranty
Description
Product Overview
IS400TCASH1AGD (IS400TCASHIAGD is typographical variant) is the Core‑Analog Terminal Board (TCAS) for GE Speedtronic Mark VIe gas‑turbine control system, working in partnership with PCAA I/O pack (IS230PCAAH1B) and thermocouple terminal board IS400TCATH1ACB. It serves as main field‑wiring interface for multi‑type analog signals, routing sensor signals to one / two / three PCAA I/O packs for simplex, dual or TMR triple‑modular‑redundant turbine control architectures.
Gas‑turbine units require large‑volume heterogeneous analog acquisition: thermocouple temperature, 4‑20 mA process signals, LVDT position, seismic vibration, pulse‑speed signals and servo drive outputs. IS400TCASH1AGD integrates signal routing, surge suppression, shielding ground distribution and terminal termination. It distributes field signals synchronously to three redundant PCAA packs under TMR configuration, guaranteeing bumpless fault‑tolerant control for critical protection loops of gas‑turbine. Removable screw‑type terminal blocks simplify field loop‑check and overhaul wiring work, widely used as drop‑in spare for combined‑cycle power‑plant Mark VIe cabinets during unit outages。
Technical Specifications
| Parameter name | Parameter value |
|---|---|
| Product model | IS400TCASH1AGD (IS400TCASHIAGD transcription error) |
| Manufacturer | GE General Electric |
| Product type | TCAS Core‑Analog Terminal Board |
| Applicable system | Speedtronic Mark VIe Turbine Control System |
| Matched I/O pack | IS230PCAAH1B PCAA core analog pack |
| Supported signal | Thermocouple,4‑20 mA,0‑10 V, LVDT excitation & feedback, seismic input, pulse input, servo coil output |
| Redundancy mode | Simplex / Dual / TMR triple modular redundant |
| Field connection | Removable screw terminal blocks |
| System‑side connection | High‑density ribbon cable to PCAA pack; P4 connector for JGPA shield board; P5 for 28 V DC backplane power supply |
| Isolation | Field‑to‑system isolation ≥1500 V AC, channel‑to‑channel isolation ≥500 V AC |
| Power supply | 28 V DC from Mark VIe cabinet back‑plane |
| Operating temperature | 0 °C ~ +70 °C cabinet environment |
| Mounting | Installed inside Mark VIe I/O rack chassis |
| Net weight | Approx. 1.9 kg |
| Certifications | Power‑plant turbine‑control industry compliance |
Key Features and Advantages
multi‑signal universal termination capability: IS400TCASH1AGD supports nearly all analog signal types required for gas‑turbine control, including temperature, pressure, vibration, valve‑position LVDT, pulse speed‑measurement and servo coil drive outputs, reducing quantity of different terminal‑board types in cabinet.
TMR‑ready signal‑splitting hardware: One terminal board distributes identical field signals to up to three PCAA I/O packs, realizing triple‑modular‑redundant acquisition without external signal splitters. Critical protection loops maintain continuous measurement even if one PCAA channel fails.
IS410STAIS2A
integrated surge‑suppression & shielding management: Built‑in surge‑protection components for field input channels; cooperates with JGPA board to provide centralized cable‑shield grounding, improving anti‑EMI performance in high‑EMI turbine‑house environments and avoiding signal jitter or false protection actions.
detachable terminal‑block design: Field‑wiring terminals can be unplugged as whole assembly. During board replacement, field cables remain connected on terminal blocks, greatly shortening outage time for hardware swap‑out.
drop‑in spare for legacy Mark VIe platform: Mechanical dimension, connector pin‑definition and signal routing match original unit. After replacement, no modification to turbine control logic; only channel loop‑verification test is required.
ESD‑sensitive hardware: Strict anti‑static measures are mandatory during handling and replacement to prevent static‑electric damage to on‑board circuits.
Application Fields
IS400TCASH1AGD is installed inside Mark VIe gas‑turbine control cabinets for combined‑cycle power plants, simple‑cycle peaking stations and industrial captive‑power gas‑turbine units.
It undertakes signal termination for core turbine‑control loops: gas‑turbine exhaust thermocouple temperature, bearing‑shell temperature, compressor pressure, fuel‑valve LVDT position, shaft‑vibration seismic sensors, rotational‑speed pulse signals and servo‑actuator coil outputs. These signals support turbine over‑temperature protection, fuel‑control regulation, valve‑position closed‑loop control and machine‑health monitoring.
During unit overhaul and spare‑replacement projects, it replaces aged TCAS terminal boards; existing field sensor cables can be fully reused, reducing unit‑downtime. It is also held as critical spare‑part inventory for power‑plant maintenance‑workshops supporting GE gas‑turbine assets.
Related Products
- IS230PCAAH1B: PCAA core‑analog I/O processing pack, matched host module for IS400TCASH1AGD
- IS400TCATH1ACB: Thermocouple dedicated terminal board, works together with TCAS board for temperature‑signal acquisition
- IS400JGPA: Shield‑ground distribution board connected via P4 connector of TCAS board
- IS420UCSCH1A: Mark VIe main controller module
- High‑density ribbon flat‑cable: Internal connecting cable between TCAS terminal‑board and PCAA I/O pack
Installation and Maintenance
pre‑installation preparation: Power‑off Mark VIe cabinet before installing IS400TCASH1AGD. Wear ESD anti‑static wrist‑strap when handling board. Inspect ribbon‑cable connectors for bent pins or oxidation. After mechanical installation, connect P5 28 V‑DC power and P4 JGPA shield‑board connector. Perform full channel loop‑check, verify signal acquisition and TMR redundant‑synchronization status before putting turbine‑control system online.
maintenance recommendations: During unit‑outage inspections, check screw‑tightness of removable terminal‑blocks; cabinet thermal‑cycling may cause screw‑loosening leading to poor‑contact measurement faults. Keep complete Mark VIe project backup. Do NOT hot‑swap this terminal‑board under cabinet powered‑on, hot‑swap will cause loss of critical analog‑measurement signals and may trigger turbine‑trip. The board contains no field‑serviceable assemblies; return defective hardware to GE‑authorized repair‑centres.
Product Warranty & Support
Each IS400TCASH1AGD passes factory multi‑channel signal test, surge‑protection inspection and TMR‑signal‑routing verification before shipment. Standard equivalent warranty covers manufacturing defects for 12 months from delivery date. Spare‑part sourcing, remote‑technical guidance and SAT‑support services are available for spare‑replacement, field‑loop‑check and fault‑diagnosis. Application‑engineers offer support for TMR‑configuration debugging and abnormal analog‑signal troubleshooting. Long‑term spare‑parts inventory mitigates obsolescence risk for installed Mark VIe turbine‑control assets.
