Description
1. At-A-Glance Executive Brief
- Model: IS200TCASH1ACB
- Brand: GE (General Electric / Mark VIe Platform)
- Part Type: Simplex Analog Input/Output Terminal Board (TCAS)
- System Compatibility: Mark VIe Distributed Control System Rack Architecture
- Lifecycle Status: Active / Legacy Support Tier
- Weight: 1.25 kg
2. Technical Introduction
Field instrumentation in power generation facilities relies on clean, uninterrupted analog signal transmission to maintain precise loop control over high-pressure gas and steam turbines. The GE IS200TCASH1ACB operates as a simplex analog terminal board within the Mark VIe architecture, terminating critical field signals such as 4-20 mA loops, thermocouple inputs, and resistance temperature detectors. By providing robust signal conditioning and onboard surge suppression right at the cabinet entry point, this hardware protects downstream processor modules from voltage transients and common-mode electrical noise generated by heavy plant equipment.
3. Core Technical Specifications
| Parameter | Value |
| System Series | Mark VIe / Mark VIeS |
| Board Type | Simplex Analog Input / Output Terminal Board (TCAS) |
| Compatible I/O Packs | Analog Input (Standa / Mark VIe Analog Packs) |
| Input Channel Capacity | Multi-channel analog input and output termination |
| Terminal Style | Fixed Barrier Plug-In Terminal Blocks |
| Mounting Configuration | DIN Rail or Cabinet Backplate Mount via Standoffs |
| Electronic Keying | On-board ID chip for automated hardware configuration |
| Please refer to the OEM datasheet for complete environmental tolerances. | * |
4. Field Engineer’s Tech Notes
- Shield Grounding Bar Integrity: Terminate all incoming analog signal cable shields securely to the designated chassis ground bar directly adjacent to the TCAS board. Leaving shield drains floating or grounding both ends creates ground loops that introduce severe 50/60 Hz noise into low-level thermocouple and 4-20 mA control loops.
- Cold Junction Compensation Accuracy: Ensure the cabinet internal temperature remains stable and free from direct drafts when utilizing thermocouple inputs on this board. Rapid ambient temperature swings across terminal blocks without adequate stabilization will degrade cold junction compensation accuracy, leading to thermocouple reading drift.
5. Adaptive QA & Testing Protocol
Every IS200TCASH1ACB unit undergoes rigorous bench testing utilizing a dedicated Mark VIe validation test rig to simulate live plant analog loops. Testing procedures include multi-channel 4-20 mA signal injection and millivolt thermocouple simulation to verify measurement accuracy and channel linearity across the entire operating range. Isolation resistance is measured across all input channels to guarantee zero crosstalk or ground leakage. The on-board EEPROM ID chip is also queried to ensure proper electronic keying identification. Complete test reports and pre-shipment functional inspection videos are available upon direct request.
6. Buyer’s FAQ
- What warranty coverage comes with this terminal board? All New Surplus (NSFP) and fully refurbished IS200TCASH1ACB boards are backed by a comprehensive 12-month replacement warranty from the invoice date.
- Does this part include the corresponding Mark VIe I/O pack? The part number designates the terminal board hardware exclusively; matching analog I/O packs and inter-connect cables must be sourced separately.
- Are these boards compatible with older Mark VI system retrofits?
