What systems is the AX-21 compatible with?
It is intended for PLC architectures supporting AX-series modules; verify backplane and firmware compatibility
1 actual photo shown first. Reference images are model-matched and must be confirmed before purchase.
Mitsubishi
AX-21
AX-21 PLC processor module
Mitsubishi
From $594.6In stockDiscontinued
Product Description
The AX-21 is a PLC processor module designed for industrial automation systems requiring reliable control and integration. It serves as the central processing unit within a PLC rack, managing logic execution, I/O handling, and communication with peripheral modules. Built for continuous operation in demanding environments, it offers stable performance for process control, machine automation, and discrete manufacturing applications. The module is compatible with PLC architectures that accept AX-series modules and can be deployed in new installations or as a replacement unit. Typical use cases include upgrading existing control systems or maintaining legacy equipment where the AX-21 form factor is specified. Packaging and accessories may vary depending on source; ensure proper backplane and power compatibility before installation. No software or cables are included unless explicitly stated by the supplier.
Key Features
- •Industrial PLC processor module for automation, Compatible with AX-series PLC systems, Designed for continuous, reliable operation, Handles logic execution and I O management, Suitable for process and machine control
Buy Options
Condition, indicative price, stock, and lead time. Confirm current availability via RFQ.
ConditionPriceAvailabilityLead time
New
Price: $667.7
Availability: 8 in stock
Lead time: ~2 day lead
Never Used
Price: $632.55
Availability: 5 in stock
Lead time: ~9 day lead
Used
Price: $594.6
Availability: 4 in stock
Lead time: ~9 day lead
Specifications
- Model
- AX-21
- Product type
- PLC processor module
- Part #
- AX-21
- Category
- PLCs/Machine Control
- Subcategory
- VDC Logic I/O Module
- Weight
- 1.06 lbs
Before we quote this part
Actual photos when available
Nameplate, condition, and visible wear can be shared before quote when stock photos are not enough.
Test notes for used units
Power-on or function test status is stated when available, with clear condition grading.
Trackable global shipping
DHL, FedEx, UPS, or forwarder options can be quoted with packing photos and tracking details.
Clear DOA boundary
For tested units, quote terms can include 7-day DOA support unless otherwise stated.
Independent sourcing disclaimer
We are not an authorized distributor, reseller, or representative of Siemens, Mitsubishi, Omron, or other manufacturers listed on this site. All product names, trademarks, brands, and logos are the property of their respective owners. Products may be used, refurbished, surplus, or sourced from the secondary market unless otherwise stated.
Need AX-21 availability?
Prices and stock can change. Submit quantity, required condition, and destination for a current quote.
FAQ
Does the AX-21 include software or cables?
No, software and cabling are typically sold separately unless specified by the supplier
Is this suitable for continuous operation?
Yes, it is designed for industrial environments and 24/7 operation
Can it replace an existing AX-21 module?
Yes, it can be used as a direct replacement in compatible PLC racks
What is the condition of typical units sold online?
Listings may vary; some are new open box—confirm condition with the seller