Obsolete Modicon (Schneider Electric) Parts Sourcing

984, TSX and Quantum defined process automation for decades — and thousands of racks still run. We source legacy Modicon hardware worldwide.

Modicon invented the PLC in 1968, and its legacy platforms — the 984 family, TSX Micro/Premium, and early Quantum — still run water/wastewater plants, material handling and OEM machines worldwide. Schneider Electric has moved the line-up to Modicon M580/M340, and Concept/ProWorx/Unity programming for the old platforms survives only on virtual machines and scavenged laptops.

TGK Parts sources obsolete Modicon parts through a global surplus network. Send the part number (e.g. 984-385, TSX3721101) or a nameplate photo — we reply within 12 hours with availability, condition and price, bench-tested before shipping.

Legacy Modicon families and modules we source

SeriesDiscontinued modelsCurrent replacement
Modicon 984984-385/445/485/685/785 CPUs, 984 I/O modules, 984 power suppliesMigrate to Quantum / M340
TSX MicroTSX3721101/3722101/3722102, TSXDMZ28DR, extension modulesMigrate to M221 / M241
TSX PremiumTSX P57/37/21 CPUs, TSX AEZ/DEZ/ISY/ISY modulesMigrate to M340 / M580
Quantum (legacy revs)140-CPU434/534/652, 140-DDI/DOO/AVI modules, 140-CRP commsDirect surplus sourcing
Momentum / Atrium170ENT I/O, 171 CCCB modules, 170INT modulesDirect surplus sourcing
Legacy programmingConcept/ProWorx/Unity licenses, S98 cables, XBTZ adaptersSourced as surplus

Our sourcing process (quote within 12 hours)

  1. Send the Modicon part number or nameplate photo — note the platform (984, TSX, Quantum) and any comms adapters fitted.
  2. We query the global surplus network — European and North American water-plant decommissioning stock is the richest source.
  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 and run, I/O forcing, comms verification — 12-month warranty on every unit.

Frequently asked questions

Can you source a 984-385 CPU?

Yes — 984 CPUs are a core sourcing line. Send the exact part number and rack type; we reply within 12 hours.

Are TSX Micro PLCs still available?

Regularly as tested surplus from decommissioned material-handling and packaging lines. Send the TSX model for a quote.

Do you supply Quantum 140-CPU modules?

Yes — legacy Quantum CPUs and I/O are in regular sourcing rotation as tested surplus.

Can you pre-load my Modicon program?

Yes — send your Concept/ProWorx/Unity backup and we load, verify and run the CPU before shipping.

What replaces a 984 or TSX rack today?

Schneider's migration path is M340/M580 (984/Quantum) or M221/M241 (TSX Micro), with program conversion in EcoStruxure Control Expert. We supply legacy spares until your window.

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