IS220PDIAH1B: What "H1BE" on the Label Should Tell You
This listing carries two closely related identifiers — IS220PDIAH1B and IS220PDIAH1BE — and that's worth clarifying before anything else. PDIA is GE's Speedtronic Mark VIe pack for discrete contact inputs: limit switches, pressure switches, valve position indicators, trip signals, and pushbuttons. It mounts directly on a discrete input terminal board through a single DC-37 pin connector and exchanges data with the <R>, <S>, or <T> controller over the I/O Ethernet network (IONet) through dual RJ-45 ports, as documented in GE's GEH-6721 Mark VIe Control System Guide.
The part number recorded against this unit is IS220PDIAH1B. A trailing letter such as the "E" that also appears in this listing's title normally points to a further hardware or firmware revision within the H1B design generation rather than a different function, but we have not found a published source confirming exactly what that specific letter changes on this pack. If the distinction matters for your outage, ask us for a label photo before you order rather than relying on the catalog title alone.
Functionally, PDIA reads up to 24 contact inputs plus terminal-board-specific feedback signals, with input voltage handling depending on which terminal board is fitted — TBCIH1, H2, or H3 — plus a separate path for the isolated, voltage-sensing TICI board. Compatible terminal boards are TBCI, TICI, and STCI; the DIN-rail mounted DTCI board is not part of this family. Each input runs through a comparator with a variable threshold, is opto-isolated through its own isolated supply, and includes filtering, hysteresis, and a dedicated yellow status LED. Optical isolation is rated to 1500 V, the hardware input filter runs at 4 ms, and the pack is rated for -40 to +70°C operation.
Where the Fault Really Lives Before You Swap This Pack
An I/O pack is the last link in a chain, not the whole chain. Before ordering a replacement PDIA, work through what's actually upstream of it:
- The terminal board (TBCI/TICI/STCI) performs the first stage of signal conditioning. A bad reading is frequently a field contact, wetting-voltage, or wiring fault at the terminal board — not the pack itself.
- Mark VIe I/O packs, PDIA included, run on an auto-reconfiguration model tied to the ToolboxST server. A "configuration mismatch" alarm after a logic build or download is a software/configuration symptom, and is a different problem than a hardware fault — don't assume the pack is bad just because an alarm appeared right after a download.
- When you're online with ToolboxST, a failed or non-communicating I/O pack is typically flagged directly in the interface — check pack status there before pulling anything out of the cabinet.
- The swap test still settles most doubts: move the suspect pack to a known-good terminal board, or a known-good pack onto the suspect board, and see which one the fault follows.
- Confirm whether you're running Simplex, Dual, or TMR — one, two, or three packs respectively — since a single-channel fault behaves differently depending on which configuration you're on.
- Inspect IONet cable ends, connectors, and bend radius, and rule out heat and dust in the cabinet; packs mounted in vertical columns without forced airflow run hottest at the top and are commonly cited as a leading cause of I/O pack failures in the field.
What "NSFP" Means for This Unit
NSFP designates new surplus factory package — unused stock still in its original factory packaging, rather than a used, cleaned-and-tested unit. It carries the same 1-year warranty noted in the table below. Confirming the exact revision and suffix still matters even on unused stock, since GE revised this pack's hardware over its production life, and your ControlST project and terminal board need to match what you install.
Where PDIA Fits in the Mark VIe I/O Family
PDIA is the input-only half of GE's discrete I/O pack family for Mark VIe. Where a panel needs discrete outputs instead, the related pack is PDOA; where a single terminal board handles both input and output together, PDIO is the combined pack. All three share the same processor architecture and connect to the controller the same way, over IONet. See our GE Speedtronic Part Number Decoder for how the rest of GE's part numbers are built, and our GE Mark VI IS200 Boards collection for the terminal boards this pack pairs with.
Information to Send With Your Quote Request
- The full part number exactly as printed on the label, including any trailing letter
- A photo of the label itself
- Turbine model and Mark control generation
- Quantity needed
- Urgency — stock order, planned outage, or unplanned downtime
We respond to every request within 24 hours, ship worldwide DDP, and accept purchase orders. Request a Quote and our team will confirm fit and availability directly — we do not publish prices on this site.
General Information about the Product |
Part Number |
IS220PDIAH1B Mark VI IS220 |
Description |
IS220PDIAH1B By GE IS220PDIAH1BE Discrete Input I/O Pack Mark VI IS220 NSFP |
Condition |
newSurplusFactoryPackage With 1 Year Warranty. |
