GE Mark VIe RESISTANCE TEMPERATURE DEVICE INPUT MODULE IS220PRTDH1AD/IS220PRTDH1A In stock

The IS220PRTDH1AD (alternate IS220PRTDH1A) is a high‑precision RTD input module engineered by GE for the Mark VIe Speedtronic turbine control platform. Designed as a plug‑in I/O pack, the IS220PRTDH1AD interfaces directly with compatible RTD terminal boards (TRTD, SRTD), providing 8 native RTD channels with 2‑/3‑/4‑wire sensor support. The IS220PRTDH1AD digitizes temperature signals from PT100 or PT1000 sensors using a 16‑bit ADC, achieving ±0.1% accuracy with 2500 Vrms channel isolation. Dual redundant 10/100 Mbps Ethernet ports connect the IS220PRTDH1AD to the IONet, enabling deterministic real‑time data transfer. With integrated open/short‑circuit detection, hazardous location certification, and a compact form factor, the IS220PRTDH1AD delivers reliable turbine thermal monitoring in gas, steam, and hydro applications.

• Gas turbine exhaust temperature monitoring and combustion control

• Steam turbine bearing, casing, and lubricating oil temperature supervision

• Generator winding and core RTD temperature acquisition

• Balance‑of‑plant (BOP) equipment thermal protection systems

• Safety Instrumented Systems (SIS) for overspeed and over‑temperature protection

• Hydropower turbine bearing temperature monitoring

• Compressor and pump station thermal surveillance

• Retrofit and upgrade of legacy Mark V and Mark VI RTD termination boards

• 8 high‑density RTD channels: Native support for up to eight independent RTD sensors; expands to 16 channels when paired with TRTD terminal boards, significantly reducing per‑channel footprint.

• 24‑bit Σ‑Δ ADC with 16‑bit effective resolution: Delivers 0.1°C temperature resolution and ±0.1% reading accuracy, ensuring precise thermal data for protection and performance algorithms.

• 2500 Vrms galvanic isolation (channel‑to‑channel): Blocks conducted EMI and transient surges from propagating between measurement channels or to the backplane, essential for noise‑prone turbine environments.

• 2‑wire, 3‑wire, and 4‑wire sensor compatibility: Selectable configuration per channel via terminal board jumpers; 3‑wire and 4‑wire modes provide automatic lead‑wire resistance cancellation, eliminating sensor cable length errors.

• Dual redundant Ethernet ports (10/100 Mbps, IONet): Two independent RJ45 connectors support active‑active IONet communication; if one network path fails, the module continues data transmission without interruption or latency spikes.

• On‑board self‑diagnostics with LED indication: Continuous monitoring for open‑circuit, short‑circuit, out‑of‑range conditions, and channel health; faults are immediately reported via front‑panel LEDs and controller fault tables.

• Hazardous location certified (Class I Div 2, ATEX Zone 2): Certified for installation in potentially explosive atmospheres when used with approved terminal boards such as IS200TRTDH2D, IS200SRTDH1A, or IS200SRTDH2A.

• 24 V DC nominal power with wide tolerance (18–32 V): Operates directly from standard industrial 24 V control power; wide input range accommodates voltage dips and plant power fluctuations.

• Pluggable I/O pack design: Mounts directly onto compatible terminal boards via DC‑37 pin connector, secured by threaded studs and a dedicated mounting bracket; hot‑swap and replacement require power‑off per manufacturer guidelines.

• Wide RTD type compatibility (PT100, PT1000, NI120, CU10): Supports multiple industrial RTD standards, field‑configurable without hardware changes – only software channel parameter adjustments required.

• 1 mA constant current excitation source: Provides stable excitation current for RTD sensors, maintaining measurement linearity across the entire –200°C to +850°C operating range.

• ToolboxST software integration: Channel scaling, RTD type selection, diagnostic configuration, and I/O mapping are fully managed through GE‘s ToolboxST engineering environment.

• Converts low‑level RTD resistance changes (Ω) into digitised temperature values using a 24‑bit Σ‑Δ ADC, applying built‑in linearisation tables for PT100, PT1000, NI120, and CU10 sensors.

• Transmits digitised temperature data via dual redundant 10/100 Mbps Ethernet ports (IONet) to Mark VIe controllers (IS200VCMIH1C) for real‑time monitoring, alarm annunciation, and protection logic execution.

• Automatically cancels lead‑wire resistance errors in 3‑wire and 4‑wire configurations by measuring the resistance of the return conductor and subtracting it from the total loop resistance.

• Electrically isolates each input channel from the system backplane at 2500 Vrms, blocking ground loops, conducted EMI, and surge transients that originate from long field cables in high‑voltage turbine enclosures.

• Performs continuous self‑diagnostics of RTD sensor integrity – open‑circuit, short‑circuit, out‑of‑range (below sensor minimum or above sensor maximum), and internal A/D converter health – reporting all faults to the controller fault table.

• Communicates with the Mark VIe controller using the IONet protocol (100 Mbps full‑duplex), delivering deterministic I/O updates with sub‑500 ms per‑channel scan rates for time‑sensitive temperature protection loops.

• Supports dual‑redundant network communication: the two Ethernet ports operate in parallel; if one network path fails, the module continues data transmission through the secondary port with zero interruption, enabling high‑availability architectures for safety‑critical monitoring.

Q1: What is the difference between IS220PRTDH1AD and IS220PRTDH1A?
A1: The IS220PRTDH1AD and IS220PRTDH1A share identical functional specifications, channel count (8 RTD inputs), and Mark VIe platform compatibility. The “D” suffix in the part number generally indicates a later revision that includes enhanced diagnostic capabilities or updated hazardous location certification.

Q2: How many RTD channels does the IS220PRTDH1AD support?
A2: The IS220PRTDH1AD natively supports 8 RTD input channels. When used with a TRTD terminal board (IS200TRTDH2D), the module can be expanded to handle up to 16 RTD inputs, providing flexible scalability for multi‑point temperature monitoring.

Q3: What RTD sensors are compatible with the IS220PRTDH1AD?
A3: The IS220PRTDH1AD supports PT100 (‑200°C to +850°C), PT1000, NI120, and CU10 sensors. Each channel is independently configurable for 2‑wire, 3‑wire, or 4‑wire connection via terminal board jumpers; 3‑wire mode is strongly recommended for lead‑wire resistance cancellation.

Q4: What isolation does the IS220PRTDH1AD provide?
A4: The IS220PRTDH1AD provides 2500 Vrms channel‑to‑channel isolation and ≥500 Vrms channel‑to‑backplane isolation. This galvanic isolation protects the controller from field‑side voltage spikes, ground loops, and conducted EMI, ensuring reliable operation in high‑voltage turbine environments.

Q5: Is the IS220PRTDH1AD certified for hazardous locations?
A5: Yes, the IS220PRTDH1AD is certified for use in Class I, Division 2, Groups A, B, C, D and ATEX Zone 2 hazardous (classified) locations when used with approved terminal boards such as IS200TRTDH2D, IS200SRTDH1A, or IS200SRTDH2A. The module must be installed within an appropriate enclosure per local electrical codes.

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