The IS200AEADH4ADA Input Terminal Board at a Glance

When a site loses an input channel, the terminal board is usually the second thing blamed and the last thing actually at fault. The IS200AEADH4ADA is the H4A configuration, revision DA, of GE's AEAD board family — the variant that vendor catalogs list as an Input Terminal Board. AEAD is a function code from the Mark VIe wind era of GE's IS200 hardware line: the family's H1A group serves as the Input/Output Grid Fork module in wind turbine and balance-of-plant control, while H3A and H4A carry the terminal board configurations where field wiring lands and gets handed to the control electronics.

This particular unit is a used board, cleaned and tested before sale; the exact condition and warranty wording sits in the table at the end of this description.

Symptoms That Point Away From the Terminal Board

Here is the diagnostic honesty most listings skip: a terminal board is one of the least likely components in the signal chain to fail on its own. It has no processor to crash and, in most configurations, little to age beyond its connectors and any switching components. So before you buy, check the three places the same symptom usually comes from:

• The wire, before the board. Measure the field signal right at the landing point. Absent there? Your fault is a sensor, a broken run, or a junction box — somewhere out in the plant, not on this board.
• The connector, after the board. The handoff from terminal board to the module that reads it travels through cables and connectors that suffer every time someone works in the cabinet. Reseat them; inspect for bent pins. Half the terminal board swaps we hear about started as a connector nudged during unrelated work.
• The reader, beyond the connector. If the signal is present and the connection is solid, suspect the electronics module processing this board's channels. Swap-test that module against a known-good one if the site has a twin.

What does legitimately condemn a terminal board: visible burn or corrosion damage at a landing point, a cracked trace after mechanical stress, or a channel that stays dead with a verified signal in and a verified-good reader out. Then you are in genuine replacement territory, and a tested used board is the economical way back to service.

AEAD Numbering: Function Code, H4A Group, DA Revision

Read IS200AEADH4ADA in four pieces: IS200 (GE standard-assembly control board, Mark VI/VIe hardware generation), AEAD (the family's function code), H4A (hardware configuration group), DA (revision). The group letter is the one people get wrong: an H1A grid fork module and an H4A terminal board share the AEAD code and are entirely different boards. Match the group exactly and confirm the revision from the label on your installed unit. The full numbering grammar is in our GE Speedtronic Part Number Decoder.

Catalog Labels vs Reality for This Board

Shop the surplus market for this part and you will see it filed three ways: under Mark VI (because of the IS200 prefix), under Mark VIe Wind (where GE's functional catalogs place the AEAD acronym), and under generic drive control headings. That is a quirk of how distributors index shared GE numbering, not evidence of three different boards. Your defense as a buyer is simple: quote by the complete part number, attach a label photo, and let the physical hardware settle the category question. We verify against the actual unit on our shelf, not against a shelf label.

Sourcing a Used, Tested IS200AEADH4ADA

For a board whose OEM documentation is scarce online and whose production days are behind it, the surplus market is the realistic supply line. A used unit that has been cleaned and tested gives you a known-working board with its terminations inspected — and for terminal boards specifically, inspection matters more than hours, since the failure points are mechanical. If your reliability policy calls for unfielded stock instead, ask; we will tell you honestly what we can source.

From RFQ to Delivery, Worldwide

Click Request a Quote and include: the full part number IS200AEADH4ADA, a label photo, the turbine or plant system it serves, control generation per your records, quantity, and your timeline. You get an answer within 24 hours. We ship worldwide on DDP terms and accept purchase orders — no payment friction while your channel sits dead. Related boards are in the GE Mark VI IS200 Boards collection and the wider GE Speedtronic Turbine Control Boards range.

General Information about the Product
Part Number	IS200AEADH4A Mark VI IS200
Description	IS200AEADH4A By General Electric IS200AEADH4ADA Input Terminal Board
Condition	used Cleaned and Tested. With 1 Year Warranty