GE DS200TCRAG1ACC – Thermocouple Input Board for Speedtronic Mark V Temperature Acquisition

The GE DS200TCRAG1ACC is a Thermocouple Input Board engineered for Speedtronic Mark V control systems. From my experience, this board typically handles multi-channel thermocouple signals with cold-junction compensation, linearization, and fault detection, then streams clean, time-coherent temperature data to the Mark V backplane. If you’re maintaining a gas/steam turbine, HRSG, or high-temperature process line, this is one of those plug-in spares that keeps trips down and diagnostics straightforward.

Our Order Process & Guarantees

• Warranty: 365 days
• Lead time: 1 week if in stock; no more than one month at the latest
• Payment terms: 50% advance payment; full payment prior to delivery
• Express options: FedEx, UPS, DHL
• Every unit is function-tested prior to shipment and packed for ESD protection

Key Features

• Thermocouple signal conditioning – Accepts low-level mV inputs from common TC types (J, K, T, E, R, S, B) for turbine and process measurements.
• Cold-junction compensation – CJC circuitry helps maintain accuracy across cabinet temperature changes.
• Linearization and fault detection – On-board processing typically provides open-circuit detection and stable scaling to engineering units.
• High-noise immunity – Input filtering and board layout designed for EMI/RFI resilience in turbine enclosures.
• Backplane integration – Direct interface to the Mark V backplane for deterministic data transfer; no external wiring beyond the terminal board.
• Field serviceability – Plug-in replacement with captive hardware; typically no recalibration required after swap.
• Status indication – You might notice service LEDs that make field diagnostics faster.
• Drop-in compatibility – Designed for Speedtronic Mark V racks with the matching thermocouple terminal board.

Technical Specifications

Application Fields

This board is commonly used wherever reliable, multi-point temperature monitoring feeds the Mark V control:

• Gas and steam turbine exhaust, bearing, and casing temperature surveillance
• HRSG and boiler tube temperature mapping
• Industrial furnaces, reformers, and kilns requiring stable high-temperature measurement
• Compressor trains and balance-of-plant thermal protection

“Swap time was under 30 minutes and our drift issue disappeared,” noted a maintenance lead at a combined-cycle plant after replacing a TCRA board during a scheduled outage.

Advantages & Value

• Reliability – Proven GE hardware with robust filtering helps avoid nuisance trips in electrically noisy rooms.
• Compatibility – Drop-in fit for Mark V with the matching terminal board; no wiring rework in most cases.
• Reduced downtime – Quick board-level replacement means faster recovery from channel faults.
• Support – From part selection to commissioning advice, we typically help verify revisions and backplane compatibility before shipment.
• Lifecycle savings – Stable temperature inputs contribute to better tuning, fewer false alarms, and less wear on the machine.

Installation & Maintenance

• Cabinet & environment – Install in a clean, ventilated Mark V enclosure. Maintain airflow and keep away from high-voltage cabling to limit induced noise.
• Wiring practices – Use matching thermocouple extension wire and correct polarity. Route TC pairs separately from power conductors; land shields at a single point to minimize ground loops.
• ESD handling – Use a grounded wrist strap, power down the rack, and allow discharge time before removal or insertion.
• Commissioning – After installation, verify each channel with a dry-well or simulator. You might notice that open-circuit detection quickly flags miswired points.
• Routine care – Periodic connector re-seating, light dust removal with dry air, and point-to-point checks during outages are usually sufficient. Firmware changes are not typically required for this board type.

Quality & Certifications

• Manufacturing quality: GE production under ISO 9001 quality systems (typical for this product family)
• UL/cUL: Generally recognized as part of the complete control panel assembly
• CE: System-level CE compliance depends on the overall Mark V cabinet configuration
• RoHS: Legacy hardware may not be RoHS; compliant alternatives or refurbished options can be discussed
• Warranty: 365 days replacement/repair coverage from delivery

Related/Supporting Components

• GE DS200TBTC – Thermocouple terminal board that mates with TCRA; provides field-wiring terminations and local CJC hardware.
• GE DS200TCQAG1A – Analog/quantizer or controller interface board in the Mark V core; receives processed data from input boards.
• GE DS200TBCAG1A – Termination board variant often used for field I/O aggregation; useful when expanding or reorganizing wiring.

If you’re unsure about the exact terminal board or revision pairing, share a photo of your existing rack slots and part labels—matching “G” group and revision letters typically avoids compatibility surprises.