Key Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | IS220PRTDH1BC / 336A5026ADP13 |
| Brand | GE / GE Vernova |
| Module Type | RTD temperature input pack |
| Series | GE Mark VIe Speedtronic |
| RTD Inputs | Up to 8 per pack (pack-level) |
| A/D Resolution | 14-bit (reference spec for PRTDH1 series) |
| Max Lead Resistance | 15 Ω |
| Power Supply | 28 VDC (approx. 0.18–0.24 A, vendor-claimed) |
| Communication | Dual RJ-45 Ethernet ports on I/O pack |
| Compatible Terminal Boards | IS200TRTDH1D, IS200TRTDH2D, IS200SRTDH1A, IS200SRTDH2A (verify revision) |
| Hazardous Location | Class I, Div 2, Groups A–D, T4 (with approved terminal board) |
| Operating Temperature | Approx. -30°C to +65°C (vendor-claimed; confirm on nameplate) |
| Conformal Coating | Yes — typical for Mark VIe packs |
Product Introduction
The GE IS220PRTDH1BC (336A5026ADP13) is a Mark VIe RTD input pack used in GE Speedtronic turbine and wind turbine control systems. It is not a standalone analog card. It functions as a distributed I/O pack that connects to an RTD terminal board — typically a TRTD or SRTD board — and communicates over the Mark VIe Ethernet I/O network.In the field, this pack handles temperature measurement for bearings, windings, lube oil, exhaust zones, and other critical turbine points. What makes it tricky to replace is the terminal board dependency. The pack must match not only the station firmware but also the terminal board revision. A PRTDH1BC dropped onto the wrong TRTD revision may power up and still throw compatibility faults. I would never install one without confirming the terminal board type, pack revision, and existing Ethernet node assignment first.
Quality SOP & Tech Pitfalls
The Lab Report (SOP)
- Visual and counterfeit check: nameplate, 336A5026ADP13 label, revision marking, conformal coating condition, Ethernet port pins, DC power connector.
- Live test on a compatible Mark VIe test rack: power-up, pack recognition, Ethernet link detection, RTD channel simulation.
- Electrical checks: 28 VDC supply verification, insulation resistance, lead resistance simulation, channel accuracy check with a Fluke-style calibrator.
- Firmware/revision logging: record pack revision, firmware build, terminal board type, and Ethernet node configuration.
- Anti-static sealing: ESD bag, foam padding, rigid carton, with test record attached. Test video or report available on request.
The Engineer’s Warning (Pitfalls)
- Terminal board mismatch is the most common failure. IS220PRTDH1BC must pair with the correct TRTD/SRTD terminal board. Wrong board revision triggers compatibility faults even if the pack itself is healthy.
- Revision suffix matters. PRTDH1A, PRTDH1B, and PRTDH1BC are not automatically interchangeable. The BC suffix indicates a specific hardware/firmware revision within the PRTDH1 family.
- Do not connect non-RTD devices. Only resistive RTD sensors should be wired to the RTD inputs. Connecting thermocouples, 4–20 mA transmitters, or voltage sources will damage the input circuitry.
- Lead resistance limit is real. Exceeding 15 Ω lead resistance degrades accuracy and may cause measurement faults.
- ESD damage is invisible. Mark VIe packs do not announce when they take a static hit. Handle with a wrist strap and proper ESD packaging.
Installation & Configuration Guide
Pre-Installation
- ⚠️ Perform a proper safety shutdown and lockout/tagout on the control rack or I/O cabinet.
- ⚠️ Wait for capacitors to discharge before removing any pack.
- Photograph the existing module: nameplate, 336A5026ADP13 label, revision, Ethernet cabling, terminal board type, slot/position, and LED status.
Removal
- Label Ethernet cables, DC power wiring, and terminal board connections.
- Release retaining hardware carefully.
- Pull the pack straight out; do not rock it against the terminal board connector.
Installation
- Confirm terminal board compatibility before installation. This is the single most important step.
- Seat the pack firmly onto the terminal board connector.
- Reconnect Ethernet cables and verify the DC power supply matches 28 VDC.
- Verify node address or network configuration matches the original pack.
Power-On & Testing
- Verify 28 VDC supply before energizing.
- Power up and check PWR, ENET1, ENET2, and ATTN LEDs.
- Confirm pack recognition in ToolboxST or the GE configuration tool.
- Verify RTD channel readings against known reference values.
- Run a short functional test before returning the turbine or process to full operation.
Compatible Replacement Models
| Compatibility Tier | Model | Notes |
|---|---|---|
| ✅ Drop-in Replacement | IS220PRTDH1BC / 336A5026ADP13, same revision | Pack revision, firmware, and terminal board pairing must match. |
| ⚠️ Family Compatible | IS220PRTDH1B / IS220PRTDH1A | May require firmware alignment, terminal board verification, and ToolboxST reconfiguration. |
| ⚠️ System Upgrade | GE Mark VIeS / Mark VII migration | Requires engineering review, I/O remapping, and logic migration. Not a simple swap. |
| ❌ Not Compatible | IS200/IS215 analog I/O boards, TCQA/TCQC boards, unrelated GE modules | Different product families. Part-number guessing will waste your outage window. |
Frequently Asked Questions (FAQ)
Q: Is IS220PRTDH1BC a standalone card or an I/O pack?
It is a distributed I/O pack that must be connected to a compatible RTD terminal board (TRTD/SRTD). It is not a standalone rack-mounted card.Q: Can I substitute IS220PRTDH1A for IS220PRTDH1BC?
Not automatically. The revision suffix matters. PRTDH1A, PRTDH1B, and PRTDH1BC may differ in firmware, filtering, or terminal board compatibility. Match the exact revision whenever possible.Q: What terminal boards are compatible?
IS200TRTDH1D, IS200TRTDH2D, IS200SRTDH1A, and IS200SRTDH2A are commonly listed. However, compatibility depends on revision. Verify against the existing terminal board label.Q: Can I hot-swap this module?
Mark VIe distributed I/O packs are designed for networked operation, but hot swap should only be performed if the station configuration and maintenance procedure explicitly allow it. Otherwise, replace during a planned outage.Q: Are the published specs reliable?
Treat them as vendor-claimed. Public listings conflict on series attribution and specifications. Always verify against the physical nameplate and OEM documentation.Q: What happens if the lead resistance exceeds 15 Ω?
Measurement accuracy degrades, and the pack may flag channel faults. Keep lead resistance within the 15 Ω limit specified for the PRTD family.Q: How do I confirm compatibility before ordering?
Send the original pack nameplate, 336A5026ADP13 label, revision, terminal board model and revision, Ethernet node assignment, and a photo of the existing installation. That is the only reliable way to avoid a mismatch.
