IS220PDIAH1B, Open Box — Factory Packaged Contact Input Pack

This IS220PDIAH1B arrives factory packaged but without its outer shipping box (open box), and carries a 1-year warranty like the rest of our stock. PDIA is GE's Speedtronic Mark VIe pack for discrete contact inputs, and one detail that's easy to miss is that it isn't a one-size-fits-all input card: it accepts three different input voltage levels depending on which terminal board is fitted — TBCIH1, TBCIH2, or TBCIH3 — and has a separate connection path for the isolated, voltage-sensing TICI terminal board. Compatible boards are TBCI, TICI, and STCI; the DIN-rail mounted DTCI board is not supported.

The pack itself mounts directly on its terminal board via a single DC-37 pin connector and talks to the <R>, <S>, or <T> controller over IONet through dual RJ-45 ports, reading up to 24 contact inputs plus terminal-board feedback. Each input has its own comparator, opto-isolated supply, filtering, hysteresis, and status LED; optical isolation is rated to 1500 V and the hardware filter runs at 4 ms. GE documents the pack in the GEH-6721 Mark VIe Control System Guide, and it supports Simplex, Dual, and TMR configurations — one, two, or three packs respectively, each with its own IONet connection(s).

Before You Install: Confirm the Fault Isn't Upstream

• A "bad input" alarm is frequently a field contact problem, a wetting-voltage issue, or miswiring on the TBCI/TICI terminal board — not the pack, since the terminal board does the first stage of signal conditioning before the pack ever sees the signal.
• Documented field cases on this pack type show that intermittent communication faults can persist through pack, cable, and switch replacements and still trace back to the terminal board — the swap test (suspect pack onto a known-good board, or vice versa) is the fastest way to find out which side is actually bad.
• Check IONet cable ends and connectors for corrosion, and confirm cable bend radius is within spec.
• Rule out environmental stress — heat, dust, and humidity are commonly cited as the biggest driver of Mark VIe I/O pack failures, and packs mounted in vertical columns run hottest at the top.
• Distinguish a Process Alarm (bad field value) from a Diagnostic Alarm (hardware/comms fault) before deciding what to replace.

What H1B Tells You

IS220 marks a Mark VIe distributed I/O pack, PDIA the contact input function, H1 the design generation, and B a hardware/processor revision beyond the original H1A. Match the complete part number and revision to your terminal board and ControlST project before ordering. Our GE Speedtronic Part Number Decoder covers GE's full naming convention.

Related Packs and Terminal Boards

PDIA pairs with TBCI/TICI/STCI-family contact input terminal boards. For discrete outputs on the same panel, see the related PDOA pack, or PDIO for a combined input/output pack on a single terminal board. Our GE Mark VI IS200 Boards collection lists compatible terminal boards.

What to Send Us for a Quote

• Full part number with suffix (IS220PDIAH1B)
• A photo of the label
• Turbine model and Mark control generation
• Quantity
• Urgency of the request

We respond within 24 hours, ship worldwide DDP, and accept purchase orders. Request a Quote and our team will confirm fit and stock — we don't publish prices online.