Description
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | General Electric (GE) |
| Primary Model | IS220PRTDH1BC |
| Associated Part Number | 336A5026ADP13 |
| Product Type | RTD Input Module / I/O Pack |
| Control System Family | GE Speedtronic Mark VIe |
| Input Type | RTD (resistance temperature detector) |
| Supported Sensors | Pt100, Pt1000, and other RTD types depending on configuration |
| Channel Count | 8 RTD inputs |
| Measurement Range | Pt100: approx. -200°C to +850°C; verify per sensor type |
| Accuracy | Approx. ±0.1°C in limited ranges; confirm with OEM documentation |
| Resolution | Approx. 0.01°C |
| Wiring Configurations | 2-wire, 3-wire, and 4-wire RTD |
| Lead Resistance | Up to approx. 15 Ω per lead, typical for this family |
| Communication | Dual Ethernet ports, Mark VIe I/O network |
| Supply Voltage | 24 V DC nominal |
| Conformal Coating | Yes, conformal-coated versions are common |
| Certifications | CE marked and UL listed on applicable versions |
| Typical Compatible Terminal Boards | IS200TRTDH2D, IS200SRTDH1A, IS200SRTDH2A, or equivalent |
Product Introduction
A bad temperature reading on a turbine bearing or exhaust stack is rarely just a sensor problem. Half the time, the issue lives in the signal chain — loose RTD wiring, a mismatched terminal board, or a failed input pack. The IS220PRTDH1BC sits between the field RTDs and the Mark VIe controller, conditioning resistance signals and delivering them over the system’s Ethernet-based I/O network.
This module is useful because it keeps RTD acquisition local, deterministic, and integrated with the Mark VIe application. It supports Pt100/Pt1000 sensors across 8 channels, accepts 2-, 3-, and 4-wire connections, and runs on a 24 V DC supply. The conformal-coated PCB helps in humid or chemically exposed cabinets. Bottom line — it is a straightforward replacement part for plants that still depend on Mark VIe hardware rather than migrating platforms.
QA/QC Transparency SOP
- Intake & Origin Verification: Record model number, revision, serial/label codes, and physical condition. Reject units with corrosion, burnt components, or missing conformal coating.
- Live Functional Testing: Power the pack at 24 V DC on a test bench. Verify dual Ethernet link LEDs, establish communication with a Mark VIe test node, and confirm channel status flags.
- Electrical Parameter Tests: Check supply rail voltage with a calibrated Fluke multimeter. Inject known RTD resistance values per channel to validate measurement response and lead-wire compensation.
- Firmware/Config Verification: Read firmware revision and board identity. Compare against the site’s existing Mark VIe pack revisions to avoid mismatched downloads.
- Final QC & Anti-Static Packaging: Inspect connectors, clean the PCB if needed, place in an ESD bag with desiccant, and ship in anti-static foam with a test report.
Field Engineer Gotchas
- Revision Mismatch: IS220PRTDH1BC is not automatically interchangeable with IS220PRTDH1A or earlier PRTD packs. Firmware and terminal-board expectations can differ. Check the Toolbox/Workstation configuration before swapping.
- Wrong Terminal Board: This pack must mate with the correct Mark VIe RTD terminal board. Using the wrong TRTD/SRTD board can cause open-circuit faults or bad scaling. Match the terminal board part number to the approved list.
- Lead-Wire Wiring Errors: A 3-wire RTD wired as 2-wire will drift. A 4-wire RTD with one lead loose will read open. Verify wiring at the terminal block, not just at the sensor.
- Thermocouple Confusion: RTD packs do not accept thermocouple, 4–20 mA, or voltage signals. Connecting the wrong sensor type can produce nonsense readings or damage the input.
- ESD and Conformal Coating: The PCB is sensitive. Handle it with an ESD strap. Do not scrape or clean the coating with aggressive solvents.
GE IS220PRTDH1BC 336A5026ADP13
Application Scenarios
- Gas Turbine Bearing Temperature Monitoring: Replacing a failed RTD pack feeding bearing metal temperature inputs into a Mark VIe simplex or TMR configuration.
- Steam Turbine Exhaust Hood Temperature: Acquiring multiple RTD points across the exhaust hood where 3-wire Pt100 sensors are standard.
- Balance-of-Plant Lube Oil Skid: Reading oil cooler inlet/outlet temperatures where long lead runs require proper 3- or 4-wire compensation.
- Wind Turbine Control Cabinet: Used in Mark VIe wind turbine control applications where conformal-coated I/O packs see temperature swings and vibration.
FAQ
Is IS220PRTDH1BC the same as IS220PRTDH1A?
No. They are different revisions within the Mark VIe RTD pack family. Pinout and firmware behavior may differ. Confirm compatibility in the Mark VIe configuration before substitution.
What terminal boards does it work with?
Typical compatible boards include IS200TRTDH2D, IS200SRTDH1A, and IS200SRTDH2A. Always verify against the current GE documentation for your system revision.
Can I connect thermocouples to this module?
No. This is an RTD input pack. Thermocouples require the correct TC input pack and terminal board.
Does it support hot-swapping?
Mark VIe distributed I/O packs can sometimes be replaced under controlled conditions, but do not pull this module live unless your site procedures and system configuration explicitly allow it.
What does the 336A5026ADP13 number mean?
It is a GE internal part/assembly number linked to the IS220PRTDH1BC. Use it to cross-check the physical label, but procure and verify by the IS220PRTDH1BC model number.
Is this module still supported by GE?
Mark VIe hardware availability depends on GE’s current lifecycle status. Many plants maintain surplus or refurbished stock for replacements. Confirm support status with GE or an authorized distributor.
Can third-party sellers be trusted for this part?
Only if they provide revision data, test records, and a warranty. Counterfeit or mismatched Mark VIe packs are common in the surplus market.
