What this board is

The IS200PSCDG1A is a Speedtronic turbine control board from the GE Mark VI generation. The IS200 prefix identifies it as Mark VI — a VME-based control system, architecturally distinct from the Mark V (DS200) and Mark IV (DS3800) panels that preceded it.

The question to answer before you order: TMR or simplex?

This is the single most important thing to establish about a Mark VI panel, and it is the one people skip. Unlike the Mark V, which was designed as a triple modular redundant system, Mark VI was designed to offer both TMR and simplex control. Two Mark VI panels can therefore be architecturally different from one another, and the correct board depends on which one you have.

The fastest way to tell without pulling documentation: look at the VCMI communications board and count its IONet ports. The simplex version has one IONet port. The TMR version has three. That single observation tells you which architecture your rack is running.

IS200, IS210, IS215, IS220

All four prefixes are Mark VI-era numbers and suppliers cross-reference them heavily. Some boards genuinely appear under more than one prefix; others do not. Do not assume a prefix difference means a different board, and do not assume it means the same board. Quote the full number — IS200PSCDG1A or the revision form IS200PSCDG1ABB — and let us confirm against what is physically on the shelf.

This unit

Used, cleaned and tested, supplied with a 1-year warranty.

What to include in your quote request

1. The full part number with the revision tail, read off the board.
2. Whether the panel is TMR or simplex — count the IONet ports on the VCMI if you are unsure.
3. The rack and slot the board occupies.
4. Whether you can accept an alternate prefix (IS200 / IS210 / IS215) or a superseding revision.
5. Whether this is a breakdown or a shelf spare.

We reply within 24 hours, ship worldwide DDP, and accept purchase orders.

Related guides

• Mark V vs Mark VI: what changes when you go from DS200 to IS200
• GE Speedtronic part number decoder