CQM1H-CPU21 | Omron CQM1H SYSMAC PLC CPU Module

Omron · PLCs & Industrial Controllers

Description  The Omron CQM1H-CPU21 is a compact PLC CPU module designed to execute control logic and manage I/O operations in SYSMAC automation systems. It supports up to 256 I/O points and includes built-in DC inputs and RS-232C communication for flexible system integration. This CPU is commonly used in small to mid-scale industrial machines requiring dependable programmable control.     Technical Specifications  Condition New/Never Used Surplus Brand Omron Category PLCs/Machine Control Part Number CQM1H-CPU21 Subcategory PLC Module/Rack Product Type PLC CPU unit PLC Series CQM1H / SYSMAC Built-in Inputs 16 DC inputs Input Voltage 24 VDC Maximum I/O Capacity 256 points Program Capacity 3.2K words DM Area Capacity 3K words Communication Interface RS-232C (built-in) Maximum Expansion Modules Up to 11 modules Mounting Type DIN rail mount Manufacturer Status Discontinued     Information About CQM1H-CPU21 The CQM1H-CPU21 is part of Omron’s CQM1H series of programmable controllers, developed for reliable and modular automation solutions. It is built as a DIN rail–mountable CPU unit with integrated I/O capability and onboard serial communication. The controller supports program and data memory suitable for standard machine control tasks and allows expansion through additional modules. Although discontinued by the manufacturer, it remains widely deployed in legacy SYSMAC systems that require stable and proven PLC performance. Key Features: PLC CPU Module: Serves as the central processing unit for CQM1H control systems. Integrated Digital Inputs: Includes 16 built-in DC inputs for direct signal connection. Expandable I/O Capacity: Supports up to 256 total I/O points per system. Program Memory Support: Provides 3.2K words of program capacity for control logic. Data Memory Area: Includes 3K words of DM capacity for operational data handling. RS-232C Communication Port: Enables serial communication for programming and monitoring. Modular Expansion Capability: Supports installation of up to 11 expansion modules. The CQM1H-CPU21 delivers the reliability and precision required for compact PLC control in legacy industrial automation systems.

Brand: Omron · Category: PLCs & Industrial Controllers

Key features

• PLC CPU Module: Serves as the central processing unit for CQM1H control systems.
• Integrated Digital Inputs: Includes 16 built-in DC inputs for direct signal connection.
• Expandable I/O Capacity: Supports up to 256 total I/O points per system.
• Program Memory Support: Provides 3.2K words of program capacity for control logic.
• Data Memory Area: Includes 3K words of DM capacity for operational data handling.
• RS-232C Communication Port: Enables serial communication for programming and monitoring.
• Modular Expansion Capability: Supports installation of up to 11 expansion modules.

Specifications

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