Description
Key Technical Specifications
| Parameter | Detail |
|---|---|
| Manufacturer | GE / GE Power |
| Model | IS200SRTDH2ACB |
| Product Type | Mark VIe RTD terminal board (SRTD) |
| System Platform | Mark VIe turbine/process control |
| Input Type | RTD temperature sensors (Pt100/Pt1000 typical) |
| Channel Count | Verify against nameplate and GE documentation |
| Associated I/O Pack | Mark VIe RTD I/O pack; exact pack model to be confirmed |
| Mounting | IS200 Mark VIe I/O terminal board |
| Communication | Via Mark VIe backplane/I/O pack; not a standalone network device |
| Accuracy/Resolution | Verify against GE Mark VIe SRTD documentation |
| Operating Environment | Industrial turbine/process control cabinet |
| Data Availability | Limited public OEM datasheet; confirm with GE Mark VIe manuals |
Product Introduction
The GE IS200SRTDH2ACB is a Mark VIe RTD terminal board used to interface resistance temperature detector signals into GE Mark VIe turbine and process control systems. It provides the field termination and signal conditioning path for RTD sensors, while the associated Mark VIe I/O pack handles scaling, linearization, diagnostics, and communication with the controller.
This board is typically found in gas turbine, steam turbine, generator, lube oil, bearing, and process temperature applications where accurate RTD measurement is required. The -ACB suffix identifies the specific board revision; compatibility should be confirmed against the Mark VIe cabinet drawings, I/O pack type, and GE revision history before installation.
QA/QC Transparency SOP
- Intake & Origin Verification
Confirm full part number IS200SRTDH2ACB, revision, serial number, and source. Reject units with mismatched labels, damaged terminal blocks, or missing revision identifiers. - Visual & Connector Inspection
Inspect RTD terminal blocks, ribbon/backplane connectors, mounting hardware, and PCB condition. Corrosion or cracked terminals can create unstable temperature readings. - Continuity & Isolation Testing
Verify terminal-to-connector continuity and check for shorts between adjacent RTD channels and chassis ground. RTD circuits are sensitive to lead resistance and insulation faults. - Functional Verification with Mark VIe I/O Pack
Where possible, test with the correct Mark VIe RTD I/O pack. Verify channel recognition, stable RTD readings, open-circuit detection, and diagnostic status. - Final QC & Anti-Static Packaging
Label with test date, revision, and condition grade. Pack in anti-static bags with terminal protection. Include nameplate, connector, and terminal photos for traceability.
Field Engineer Gotchas
- It is a terminal board, not a standalone controller.
IS200SRTDH2ACB does not execute control logic. It must be paired with the correct Mark VIe RTD I/O pack. - Some third-party listings misclassify it.
Public sources sometimes label it as Mark V or as a generic analog input module. The IS200 prefix and SRTD designation align with Mark VIe; verify against GE documentation. - RTD wiring errors look like board faults.
Swapped leads, poor terminations, or incorrect 2/3/4-wire configuration can cause offset or unstable temperature readings even when the board is healthy. - Revision suffix matters.
The -ACB revision may differ from earlier SRTDH2 variants in connector layout, component revision, or calibration data. Do not assume drop-in compatibility without checking the cabinet BOM. - Do not force-fit connectors.
Mark VIe terminal boards and I/O packs use keyed connectors. Forcing a ribbon or backplane connector can damage pins and create intermittent faults.
GE IS200SRTDH2ACB
Application Scenarios
- Turbine bearing temperature monitoring.
RTD inputs from bearing housings are terminated through the SRTD board. A faulty terminal board can cause erratic temperature alarms or false trips. - Lube oil temperature control.
Stable RTD measurement is required for oil cooler control and protection logic. Poor terminal contact or insulation failure often appears as drifting oil temperature values. - Mark VIe spare pool planning.
Plants running Mark VIe RTD I/O packs should keep verified SRTD terminal board spares if temperature inputs are tied to alarms, interlocks, or performance calculations. - Real-world case (anonymized).
A power plant reported one bearing RTD reading abnormally high after maintenance. The I/O pack diagnostics showed no internal fault. Root cause: a loose RTD lead on the terminal board created additional resistance. Resolution: reseated the terminal, verified lead resistance, and confirmed stable temperature readings.
FAQ
Is IS200SRTDH2ACB a Mark VI or Mark VIe board?
It is documented as a Mark VIe RTD terminal board. Some third-party listings incorrectly associate it with Mark V; treat those classifications as unverified.
Does it connect directly to the controller?
No. It connects to a Mark VIe RTD I/O pack, which then communicates with the Mark VIe controller.
What sensors does it support?
RTD temperature sensors, typically Pt100/Pt1000-style devices. Confirm the exact supported types and wiring configuration with GE documentation.
Can I replace it without shutting down the turbine?
Do not assume hot-swap capability. Mark VIe I/O replacements should follow approved maintenance procedures, especially for protective temperature inputs.
What should I request before buying?
Nameplate photos, revision confirmation, terminal block condition, connector condition, associated I/O pack compatibility, and verification that it matches your Mark VIe cabinet configuration.
Is it compatible with IS200SRTDH2A or other SRTD variants?
Not automatically. Suffix differences may indicate revision, connector, or calibration changes. Verify against the GE parts list before substitution.
