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PLC / controls

Siemens SIMATIC S5 is discontinued. Here's what's actually still possible.

The S5 is a first-generation Siemens PLC family still running in a large number of production lines worldwide. Siemens itself no longer sells parts or offers repair, but the installed base is large enough that a genuine secondary market — surplus modules, board-level repair specialists, and full S7 migration — all remain realistic paths. The right path depends entirely on whether the goal is keeping the S5 alive a few more years or migrating the whole control system.

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Status

ManufacturerSiemens
StatusDiscontinued — official end-of-life 30 September 2020; spare parts and repairs from Siemens ended 1 October 2020.
Designated successorSIMATIC S7 family (S7-300/400 from 1994; S7-1200 from 2009; S7-1500 from 2013) is Siemens' designated successor line.

Realistic sourcing paths

high
Surplus / used stock: A genuine secondary market exists for S5 racks, CPUs and I/O modules given how widely the platform was installed — condition and firmware revision must be verified per module.
high
Board-level repair: Independent specialists (outside Siemens) still repair S5 modules at component level — often the fastest, cheapest path for a single failed card.
medium
Full migration to S7: Siemens' own designated path. Right choice when the S5 is the last legacy piece in an otherwise modern line, or when program logic needs rework anyway — but it's a project, not a parts swap.
low
Original / OEM: Siemens itself no longer sells or supports S5 hardware as of October 2020 — this path is effectively closed.

Search terms this covers

Local: Siemens S5 reservedele · S5 modul udgået · S5 til S7 migrering
Global: Siemens S5 discontinued · SIMATIC S5 end of life · S5 to S7 migration · S5 CPU replacement · SIMATIC S5 spare parts

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Sourced from the manufacturer's own lifecycle documentation and independent trade reporting, current as of this page's last update. Availability and pricing on any path are only certain once a supplier confirms in writing.