Description
GE IS230SRTDH2A | Mark VIe RTD Input Assembly
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | GE |
| Part Number | IS230SRTDH2A |
| Product Family | Mark VIe |
| Functional Type | SRTD RTD Input Assembly |
| Architecture | Simplex |
| Input Type | RTD |
| Number of RTD Inputs | 8 |
| Processor Interface | PRTD / VRTD I/O processor |
| Mounting | DIN rail / panel-oriented assembly |
| Field Interface | High-density terminal blocks |
| System Application | GE Speedtronic turbine control |
| Board Construction | Multilayer PCB with SMD components |
| External Termination | Yes |
GE-oriented parts information identifies IS230SRTDH2A specifically as “ASSEMBLY: RTD INPUT, SIMPLEX, MKVIe.” World of Controls further identifies it as an RTD SMX DIN RAIL MODULE with eight RTD inputs connected to a PRTD or VRTD I/O processor.
Product Introduction
The GE IS230SRTDH2A is a Mark VIe SRTD Simplex RTD input assembly used to terminate and interface resistance temperature detector signals within GE turbine-control systems. It provides eight RTD input channels and connects toward the appropriate PRTD or VRTD I/O processor, making it part of the field-level temperature acquisition architecture rather than a standalone controller.
The board is designed around DIN-rail-oriented installation and external field termination. For maintenance teams, the distinction between the SRTD terminal assembly and the associated RTD I/O processor is important: replacing the terminal assembly does not replace the processor or its Mark VIe configuration.
IS230SRTDH2A
Application Scenarios & Field Pitfalls — Engineer’s Perspective
Engineering Pain Point
Temperature faults on a Mark VIe system can originate at the RTD sensor, field wiring, terminal assembly, processor interface, or configuration layer. The IS230SRTDH2A should therefore be treated as the field-interface portion of the RTD measurement chain, not as the complete temperature-input electronics package.
Typical Applications
- Gas turbine temperature monitoring — bearing, lube-oil, enclosure, and auxiliary equipment temperature measurements.
- Steam turbine applications — temperature acquisition from turbine and auxiliary equipment.
- Generator and balance-of-plant monitoring — RTD-based temperature measurements in supporting equipment.
- Mark VIe maintenance — replacement of failed or aging SRTD simplex input assemblies.
Technical Pitfalls to Avoid
- Do not confuse SRTD with a generic analog input board.
The documented function is specifically RTD input, with eight RTD channels. It belongs to the Mark VIe temperature-input architecture. - Do not confuse the terminal assembly with the PRTD/VRTD processor.
The SRTDH2A provides the field termination/interface, while the associated I/O processor performs the relevant acquisition and processing. Confirm the processor type before ordering a replacement. - Verify the complete RTD wiring arrangement.
Some secondary listings claim specific 2-, 3-, or 4-wire configurations and exact sensor types, but these details are not consistently supported across the available sources. Follow the installed Mark VIe wiring documentation rather than assuming a generic RTD wiring scheme. - Do not rely on reseller descriptions for electrical ratings.
Several listings incorrectly describe the SRTDH2A as a servo-control, mixed analog/digital, or communications module and attach unsupported Ethernet, Modbus, or PROFIBUS specifications. Those descriptions should be rejected.
Related Products
- IS230SRTD2ASRTD2AG01 — Mark VIe S-type RTD single/twin I/O module family; different hardware configuration from the SRTDH2A.
- IS230SRTD2ASRTD2AG11 — related S-type RTD twin I/O assembly.
- IS230SRTD2ASRTD2AG21 — another S-type RTD twin configuration.
- IS230SSCA2AG01 — S-type RTD single I/O assembly within the Mark VIe family.
- IS230SSCA2ASSCA2AG01 — S-type RTD twin assembly.
- IS220PTCCH2B — Mark VIe thermocouple input I/O pack; intended for thermocouple rather than RTD signals.
- IS220PTURH1B — Mark VIe turbine protection I/O pack serving a different protection function.
- IS230STAIH4A — Mark VIe basic analog I/O assembly; not an RTD-specific replacement.
The GE-oriented product catalog distinguishes the SRTDH2A from the other S-type RTD and analog assemblies, so these related products should not be treated as automatic substitutes.
Procurement and Replacement Notes
For an IS230SRTDH2A replacement, verify:
- Complete part number:
- Hardware revision, including the board’s revision marking
- Mark VIe system generation
- SRTD / Simplex configuration
- Eight-channel RTD requirement
- Associated PRTD or VRTD I/O processor
- Field terminal arrangement
- RTD sensor type and wiring used by the existing installation
- Existing Mark VIe configuration
- Connector and cable condition
- Shielding and grounding arrangement
- Calibration and temperature-channel scaling records
Recommended procurement description:
GE Mark VIe SRTD Simplex RTD Input Assembly, 8-Channel RTD Interface, DIN-Rail Terminal Board, Compatible with PRTD/VRTD I/O Processor Architecture.
The key distinction is simple: is a Mark VIe SRTD Simplex RTD input/termination assembly, not a generic analog I/O card and not the RTD I/O processor itself. Match the complete part number, revision, processor architecture, and field wiring before replacement.
