Obsolescence guides

Straight answers on the platforms that have been withdrawn, discontinued or declared end of life — what actually fails, what the manufacturer says replaces it, what that migration really costs, and when the right answer is to buy spares and leave it alone.

We sell spares, so take this as read: we will tell you when migrating is the better option, and we say so on several of these pages. A plant that trusts the advice comes back; one that was talked into the wrong purchase does not.

SLC 500 is discontinued — what are the options?

Allen-Bradley · 1991–2019, discontinued · 21 parts listed

PLC-5 end of life — sourcing and migration

Allen-Bradley · 1986–2017, discontinued · 14 parts listed

SIMATIC S7-300 withdrawn from sale — what now?

Siemens · 1995–2023, discontinued · 63 parts listed

Modicon Quantum end of commercialisation

Schneider Electric · 1995–2028 announced EOL · 27 parts listed

Modicon Premium (TSX) is discontinued

Schneider Electric · 1996–2023, discontinued · 17 parts listed

ControlLogix 1756-L6x processors are discontinued

Allen-Bradley · 1997–present, large installed base · 100 parts listed

PowerFlex 4 and 40 drives are discontinued

Allen-Bradley · 2000–present, partly discontinued · 8 parts listed

MicroLogix obsolescence — 1000, 1200 and 1500

Allen-Bradley · 1998–present, partly discontinued · 23 parts listed

MELSEC FX1 and FX2 obsolescence

Mitsubishi · 1990–present, partly discontinued · 26 parts listed

Not listed?

These are the platforms we are asked about most. If yours is not here, the catalogue covers a good deal more, and you can always just send us the part number.