Obsolete Siemens SIMATIC S5 Parts Sourcing

S5 left production around 2000 — yet thousands of European and Latin American plants still run it. We source 6ES5 CPUs, I/O and comms modules worldwide.

The Siemens SIMATIC S5 family (S5-90U through S5-155U) was discontinued around 2000, but it still controls municipal water plants, packaging lines, steel mills and textile machines across Europe, Latin America and Asia. Factory support has ended, the STEP 5 programming hardware (PG675, PC-TTY adapters) is scarce, and a single failed CPU can stop an entire plant.

TGK Parts sources obsolete Siemens S5 parts through a global surplus network: European stockholders, decommissioned plants and integrator inventories. Send the complete order number (e.g. 6ES5 095-8MA02) or a nameplate photo — we reply within 12 hours with availability, condition and price, bench-tested before shipping.

S5 platforms and modules we source

SeriesDiscontinued modelsCurrent replacement
S5-90U / S5-95U6ES5 90x compact CPUs, 6ES5 095-8M interface modulesMigrate to S7-1200 (TIA Portal)
S5-100U6ES5 100 CPUs (CPU 100/102/103), I/O 6ES5 4xx/5xx seriesMigrate to S7-1200 / S7-1500
S5-115U6ES5 941/942/943/944/945 CPUs, 6ES5 3xx/4xx/5xx I/O, IM 300/310/314S7-300 / S7-1500 retrofit
S5-135U / S5-155U6ES5 920/921/922/924/946/948 CPUs, S5 6ES5 6xx comms, EX/EXU expansionsS7-400 / S7-1500 retrofit
S5 I/O & function modules6ES5 321/322/323 digital, 331/332 analog, 466/470 special functionDirect surplus sourcing
S5 programming hardwarePG675, PC-TTY / PG-USB adapters, EPROM & EEPROM modulesSourced as surplus / USB adapters

Our sourcing process (quote within 12 hours)

  1. Send the S5 order number or a nameplate photo — S5 nameplates often omit the full 6ES5 code, so photos of the front and back help.
  2. We query the global surplus network — European stockholders and decommissioned S5 installations are the richest sources.
  3. You receive a quote within 12 hours with condition stated clearly: tested surplus or refurbished, with photos.
  4. Bench testing before shipping: power-up, program load from EPROM where applicable, I/O forcing and comms verification — 12-month warranty on every unit.

Frequently asked questions

Can you source S5 CPUs that Siemens no longer lists at all?

Yes — S5 CPUs (6ES5 94x/95x) are a core sourcing line. Our network reaches European stockholders and plant decommissioning stock that never appears in catalogues.

Is the S5-135U CPU 948 still available?

Occasionally as tested surplus. When it is not, we check revision-compatible units (948R, 948 with the right EPROM set) and quote alternatives in the same cycle.

Do you supply EPROMs with the program?

Where the seller provides them, yes. For program recovery we can also read the EPROM content and supply a programmed replacement module — send us the existing EPROM or the PLC.

What replaces an S5-115U rack today?

The standard migration path is S7-1200/S7-1500 with TIA Portal, requiring program conversion. We supply the legacy spares to keep the line running until your migration window.

How do I identify an S5 module without a manual?

Send us photos of the module front (order number printed on the label) and the rack layout. We decode the 6ES5 code and confirm compatibility free of charge.

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