Modicon 984 (Legacy) Parts
9 parts indexed · catalogue last updated 2026-09-28
Modicon 984-series legacy CPUs and modules (PC-E984 / PC-0984 numbering) — the classic 984 controller generation.
The Modicon 984 family is the classic Modicon controller generation that preceded the Quantum platform: PC-E984 and PC-0984 references mark its CPU modules and related hardware, found in long-lived installations across manufacturing and utilities. The 984 instruction set and its 984LL ladder logic remain the ancestor of the programming model used on later Modicon platforms.
These controllers are long out of active sales, so like-for-like replacement relies on the surplus and refurbished market. Product pages document memory capacity, scan behaviour and I/O capacity from the original documentation, and the sourcing notes emphasise revision compatibility — 984-series CPU revisions can differ in supported option modules.
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Need side-by-side specifications? Browse the comparison tables.
Frequently asked questions
What is included in the Modicon 984 (Legacy) family?
9 Modicon 984 (Legacy) parts are indexed on this page, each with structured specifications and links to original datasheets where available.
How do I choose between Modicon 984 (Legacy) models?
Compare sibling models side by side using the linked comparison guides, and verify electrical and mechanical parameters against the datasheet for your specific application and rack context.
Are Modicon 984 (Legacy) parts still available?
Availability varies by model and vintage. Use the source links on each product page to check live stock and request a quote; many legacy references are supplied from surplus or refurbished stock.
Which related families should I consider alongside Modicon 984 (Legacy)?
The "Related families" section above lists other product families commonly browsed together with this one. Companion components — such as mating cables, sensors or rack hardware — are usually listed in the same brand grouping.
Can I substitute one Modicon 984 (Legacy) model for another?
Only where form, fit and function match. Sibling part numbers often differ in ratings, termination or revision, and substitutions can change system behaviour. Compare the models side by side, then verify against the datasheet and your installed configuration before swapping any part.
How current is this Modicon 984 (Legacy) catalogue?
The listing count and the "catalogue last updated" date above are generated directly from our indexed database and refreshed daily. Specifications come from the source documents cited on each product page — always verify critical parameters against the manufacturer datasheet.