IS200SRTDH2A GE Mark VIe DIN-Rail RTD Board Factory New

Product Overview

The General Electric IS200SRTDH2A serves as a high-reliability, compact Resistance Temperature Detector (RTD) terminal board for industrial turbine automation.

This module operates within the Mark VI and Mark VIe Speedtronic core control architectures.

The physical footprint features a space-saving layout optimized for direct DIN-rail deployment or flat panel carrier mounting.

Each board integrates advanced high-density Euro-block terminal fields alongside a dedicated 37-pin communication interface port.

A specialized matrix of twenty-four rectangular diodes and adjacent stabilization capacitors ensures ultra-stable signal tracking.

With its premium factory-applied conformal coating, this hardware guarantees continuous operation in demanding thermal management environments.

Technical Specifications

• Brand: General Electric (GE)
• Model Number: IS200SRTDH2A
• Functional Acronym: SRTD
• Product Type: Compact DIN-Rail RTD Terminal Board
• Control Series: Mark VI / Mark VIe System
• Assembly Version: Group 2 normal assembly architecture with an A-rated functional revision
• Number of Channels: 8 independent RTD sensor inputs
• Measurement Voltage Span: 0.3532 to 4.054 V DC operational range
• Frequency Response: Supports up to 25 Hz fast-mode analog sampling synchronized with power system frequencies
• Sensitivity: High-resolution temperature tracking over long-distance sensor runs
• Linearity: Advanced digital linearization algorithm supporting 15 distinct, industry-standard RTD sensor types
• Resolution: Precision high-speed onboard Analog-to-Digital (A/D) hardware tracking conversion
• Environmental Endurance: Full industrial conformal coating protects surface-mount circuits from dust and corrosive humidity
• Noise Immunity: Onboard filter networks block high-frequency electromagnetic field interference and signal chatter
• Terminal Field: Two Euro-style terminal strips totaling 36 terminals (Terminals 25 through 34 are left uncommitted)
• Excitation Output: Multiplexed, intermittent 10 mA DC source (configurable as grounded or ungrounded)
• Shipping Weight: 0.66 lbs (0.30 kg) net weight

Installation & Grounding Guide

• Mount the SRTD board and its matching plastic insulator onto the sheet metal carrier for secure DIN-rail attachment
• Alternatively, bolt the integrated carrier assembly directly into a flat back-panel cabinet configuration
• Wire the eight field sensors into the Euro-style box terminals using 18 AWG shielded twisted triplets
• Terminate field cable shields to an external bracket assembly supplied by GE or the end user
• Connect the chassis ground screw line (SCOM) tightly through dedicated mounting holes E1 and E2 to prevent offsets

Advanced Diagnostic Capabilities

• On-Board Identification Chip: An integrated ID chip automatically transmits board hardware data to the central I/O processor
• Dynamic Scanning Modes: Normal mode scans each channel 4 times per second; fast mode escalates tracking to 25 samples per second
• Loop Integrity Checks: The controller tracks open circuits, shorted sensors, and out-of-bounds voltage variances across the 0.3532-4.054V span
• Ground Fault Separation: Configurable excitation grounding isolates external sensor field faults from the core control rack

Suitable Equipment & Application Scenarios

• Main Hardware Compatibility: Connects directly to PRTD (Proportional) or VRTD (Voltage) I/O packs via a DC-37 pin wiring harness
• System Architecture: Supports simplex industrial topologies utilizing high-speed Ethernet communication links to the controller
• Turbine Monitoring: Tracks bearing temperatures, exhaust gas spreads, and stator winding thermal loads in steam or gas turbines
• Remote Field Locations: Accommodates field sensor placement up to 300 meters (984 feet) away with a 15-ohm loop resistance limit

Global PLC Spare HUB's Insight

The IS200SRTDH2A provides excellent long-distance analog signal integrity. By leveraging an intermittent, multiplexed 10 mA excitation current instead of a continuous supply, GE engineers effectively eliminated self-heating errors in the field RTD elements. The dual-row array of twenty-four suppression diodes provides robust surge clamp protection, absorbing field transients before they can degrade the PRTD analog-to-digital converters. For high-vibration turbine decks, the conformal coating and secure Euro-block clamping offer reliable resistance to trace oxidation and harmonic loosening.

Logistics, Warranty, & Certifications

• Warranty Coverage: Protected by a comprehensive 12-month industrial replacement warranty
• Global Shipping: Rapid express dispatch via DHL, FedEx, and UPS networks
• Handling Window: Standard orders are securely packed and shipped from stock within 24 to 48 hours
• Package Contents: Shipped in an individual, factory-sealed anti-static ESD protective bag with reference documentation
• Standards Compliance: Manufactured under strict quality guidelines, CE approved, and UL listed for critical control cabinets

Buying Guide

• Confirm your application requires Group 2 hardware, as denoted by the 'H2' segment in the IS200SRTDH2A part number
• Ensure your master controller is running standard simplex logic, as this compact card does not support TMR triple-redundant inputs
• Verify that your field cabling matches the 15-ohm maximum round-trip resistance ceiling to maintain rated temperature precision

Frequently Asked Questions (FAQ)

What is the purpose of leaving terminals 25 through 34 unassigned?

Those terminals are reserved as unconnected, dead points to maintain safety clearance and separation between active sensor loops.

How does the system identify that the correct terminal board is connected to the I/O pack?

The onboard identification chip stores serial and model data, which the PRTD pack automatically interrogates via the DC-37 connector upon system boot.

Can this board operate with 2-wire or 4-wire RTD configurations?

The board is factory-optimized for shielded twisted triplets, making 3-wire RTD configurations standard for line-resistance compensation.

What happens if the distance to my turbine sensor exceeds 300 meters?

Exceeding 300 meters can push total two-way cable resistance past the 15-ohm threshold, leading to signal attenuation and incorrect temperature linearizations.

Why does the board feature a custom array of twenty-four diodes?

The two rows of twelve diodes act as input clamps to suppress transient noise spikes and preserve analog linearity during fast-mode scanning loops.

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