Product image is representative; revision or series may vary.
Contact us to request a specific version.

CQM1H-CPU21 Omron

Name: CQM1H-CPU21 Omron
Brand: Omron
SKU: CQM1H-CPU21
Price: 330.0 USD
Availability: InStock

$330.00 - $450.00

$330.00

$330.00 - $450.00

$330.00

Ships today if ordered by 1 PM CST

Overnight shipping available

Qty Available: (2) ✓ Verified Stock every 24hrs

Questions? (833) 800-7748

All products listed are sold by PLC Department, an independent supplier — not an authorized Omron distributor. Covered by our 1-year warranty. By purchasing you acknowledge our full disclaimer. Read & agree ↓

Ships from Texas, USA

Same-day by 1 PM CST

Tested & inspected

Every unit, before it ships

1-year warranty

Backed direct by us

30-day returns

Hassle-free RMA

Stock verified / 24 hrs

Real-time availability

Photos on request

Your exact unit, ~5 min

Trusted By

Product Details

Description · Specifications · Product Overview

Specifications provided for reference. Verify critical details against official manufacturer documentation before installation.

Product Overview

The CQM1H-CPU21 is a programmable logic controller (PLC) CPU from Omron's CQM1H series. It serves as the central processing unit in a modular PLC architecture, enabling control logic execution, I/O handling, and communication via its built-in RS-232C port. With a program memory capacity of 3.2 kwords and DM (data memory) capacity of 3 kwords, it supports up to 256 I/O points (including 16 built-in DC inputs). It is typically deployed in mid-range industrial automation systems, such as machine control, packaging lines, and factory automation lines.

Best Suited For

Modular machine control applications
Mid-sized assembly or packaging systems
Replacement or expansion within existing CQM1H installations
Systems requiring serial programming or host-link communication

Program capacity

3.2 kwords

DM (data memory) capacity

3 kwords

Built-in inputs

16 DC inputs

Max I/O points

256 points

Communication port

Built-in RS-232C

Technical Specifications

I/O & Electrical

Built-in inputs

16 DC inputs

Max. I/O capacity

256 points

Input voltage

24 V DC

Input current

10 mA for IN04/05; 6 mA for other inputs

Input impedance

2.2 kΩ for IN04/05; 3.9 kΩ for other inputs

Communication & Power

Program capacity

3.2 kwords

DM area capacity

3 kwords

Built-in port

RS-232C

Physical & Environmental

Weight

1.13 lbs (0.51 kg)

Certifications

CEEN61131-2

Compliant with EN-IEC 61131-2, CE marked (self-declaration) per Omron's automation systems standards.

1-Year Warranty

Every tested unit is backed by our free 1-year PLC Department warranty, direct from us.

Fast Shipping

Free ground shipping. Orders by 1 PM CST ship same-day, with overnight available.

USA Stock

Sourced and shipped from Texas, USA. Never anonymous overseas marketplace stock.

30-Day Returns

Hassle-free RMA. If the part is not right for your application, send it back within 30 days.

Reseller Options →

Resellers welcome. Reach out for volume pricing and we will get you set up.

Talk to a Real Person

Fast answers on stock, revisions, and shipping. (833) 800-7748 or live chat.

PLC Department customer reviews from maintenance and engineering teams

Trusted by 1000s of teams who keep plants running

From maintenance managers and controls engineers to Fortune 500 manufacturers, teams across America count on PLC Department. Years of customer care, every unit bench-tested before it ships, and real people on the phone when a line is down. Our job is simple: get you back up and running, fast.

Read customer reviews →

We're here to support your business
Call, email, or chat anytime

(833) 800-7748

Live chat support

contact@plcdepartment.com

Rockwell Automation documentation

Access official manuals, datasheets, and lifecycle information for this part directly from Rockwell Automation.

Visit RockwellAutomation.com →

Must Read: Disclaimer

PLC Department sells surplus and refurbished industrial automation products, including but not limited to programmable logic controllers (PLCs), which are sourced exclusively through independent third-party channels. PLC Department is not an authorized distributor, reseller, or representative of any manufacturer listed on this website, including Rockwell Automation or its Allen-Bradley brand. All product warranties, where offered, are provided solely by PLC Department and not by the original manufacturer.

Any reference to manufacturer names, logos, trademarks, or product identifiers is for identification and compatibility purposes only. All such trademarks and brand names are the property of their respective owners, and this website is not affiliated with, endorsed by, or approved by any manufacturer referenced herein.

The products offered for sale may be used or surplus and may contain older date codes, be of earlier series or versions, or differ in appearance or features compared to products available through factory-authorized distribution channels. The presence, version, or functionality of firmware, if any, on programmable devices such as Allen-Bradley PLCs is not guaranteed. PLC Department makes no representation or warranty regarding:

PLC Department does not obtain or supply firmware on behalf of customers. It is solely the customer's responsibility to ensure legal and compliant use of any firmware or software associated with products purchased through this site, including compliance with any applicable license agreements or manufacturer policies.

Products listed on this site may vary in country of origin, packaging, language, accessories, and included materials. Any quality control, testing, certification, or warranty previously associated with the manufacturer does not apply unless explicitly stated by PLC Department.

By purchasing through this website, you acknowledge and agree to these terms.