Omron CPM1 / CPM1A Parts: Stock & Sourcing
The CPM1 and CPM1A were Omron's compact controllers before the CP1 — small brick PLCs with 10 to 40 I/O points that shipped in enormous numbers on stand-alone machines throughout the 1990s and 2000s. They are discontinued, but the machines they control are still in production everywhere.
The successor line is well documented: CPM1A to CP1E, and CP1E to the current CP2E. Because the CP1W expansion ecosystem carried across both steps, many CPM1A installations migrate with modest rewiring and a program conversion in CX-Programmer.
Our stocked CPM1-line items are listed live below — currently the CPM1A-20EDT expansion I/O unit. For CPM1A-10/20/30/40 CPUs and CPM1A expansion and analog units, send the model and we will source it or quote the CP2E migration, whichever serves the machine better.
In stock now
| Model | Status | Detail |
|---|---|---|
| CPM1A-20EDT | Independent-channel stock | Specifications & indicative price |
Stock is live from our catalogue — if a model appears above, it is on the shelf in Xiamen today. Condition is stated on each product page; units are visually checked for condition and correct part marking before dispatch.
What we can source for this series
CPM1A-10CDR/20CDR/30CDR/40CDR CPUs, CPM1A-20EDR/20EDT expansion, CPM1A analog and communication units. Send the exact model and suffix from your parts list and we reply with availability, condition and price — typically within one business day.
Related pages
Frequently asked questions
What replaced the Omron CPM1A?
The CP1E, and today the CP2E. The CP1W expansion units carried across the generations, so a CPM1A machine with expansion I/O usually migrates to CP2E with limited rewiring. Our replacement guide lists the documented mappings; send your CPU model and we confirm the exact successor.
Do you stock CPM1A CPUs?
We stock the CPM1A-20EDT expansion unit directly (see the live table) and source CPM1A CPUs and other units through the independent channel. Send the exact model — including suffix — and we reply with availability, condition and price.
My CPM1A program — can it move to a CP2E?
The program converts in CX-Programmer (CPM1A and CP2E share the CX family tool chain), but addresses and expansion allocation must be reviewed, and the wiring changes. We can quote the hardware and flag the conversion points if you send the CPU and expansion list.
Omron and the series names on this page are trademarks of Omron Corporation, named for identification purposes only. Hengyixin Automation is an independent distributor, not affiliated with or authorised by Omron Corporation.