Omron CS1H-CPU65H High-Performance PLC CPU Unit
CPU unit with built-in peripheral port and RS-232C port, 60K steps program capacity, 128K words data memory (DM: 32K words, EM: 32K words × 3 banks), 5,120 I/O bits max, 0.02 µs LD instruction processing speed, up to 7 expansion racks, flash memory battery-free backup, optional memory cards and inner boards including Serial Communications Boards.
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Key Features and Technical Specifications
A rack-based programmable logic controller that packs 5,120 I/O bits, executes ladder instructions in just 0.02 µs, and scales up to seven expansion racks without blinking.
The CS1H-CPU65H stores your program and system parameters in non-volatile flash memory automatically — no battery, no data loss risk. It integrates seamlessly with the CX-One software suite, supports over 200 compatible unit types, and connects to every major industrial network.
| Specification | Details |
|---|---|
| Model | CS1H-CPU65H |
| I/O Bits (Maximum) | 5,120 |
| Program Capacity | 60K steps |
| Data Memory Capacity | 128K words (DM: 32K words, EM: 32K words × 3 banks) |
| LD Instruction Processing Speed | 0.02 µs |
| Built-in Ports | Peripheral port and RS-232C port |
| Expansion Racks (Max) | 7 |
| Internal Power Consumption | 820 mA |
| Memory Backup | Non-volatile flash memory (battery-free) |
| Control Method | Stored program |
| I/O Control Method | Cyclic scan and immediate processing |
| Programming Language | Ladder diagram, IEC 61131-3 Structured Text |
| Constant Cycle Time | 1 to 32,000 ms |
| Maximum Expansion Cable Length | 12 m total |
| Optional Add-ons | Memory cards (up to 64 MB), inner boards (Serial Communications Boards) |
| Weight | 400 g max |
Why The CS1H-CPU65H Leads In Industrial Automation
The cs1h-cpu65h omron platform consistently outperforms alternatives in its class because Omron engineered it with genuine production-grade demands in mind. It supports a constant cycle time from 1 to 32,000 ms, giving your application the timing precision it needs — from fast discrete control sequences to slower, steadier process loops.
Powerful Memory Capacity For Demanding Automation Programs
Large machines run complex code. The CS1H-CPU65H addresses this directly, offering a total memory capacity of 128K words — split between 32K words of DM and 32K words × 3 EM banks — alongside 60K steps of program storage. That’s more than enough room for multi-zone sequence control, motion profiles, data logging, and recipe management, all running in parallel.
Flexible Rack And Backplane Configuration For Large-Scale Systems
One of the CS1H-CPU65H’s standout design features is how effortlessly it handles physical expansion. The cs1h platform supports up to 7 expansion racks connected to the main CPU rack, with long-distance expansion cables spanning up to 12 meters — reaching across your control cabinet or facility with ease. Each rack mounts to its own backplane, creating an organized hardware structure that simplifies commissioning, documentation, and servicing.
Advanced Communications With DeviceNet, Controller Link, And Ethernet
The CS1H-CPU65H ships standard with a built-in peripheral port and RS-232C port, so you’re ready to program and communicate with host computers right out of the box. From there, the system’s communication options expand broadly and cleanly.
Install an optional inner board to add serial communications ports — RS-422A/485 for multi-drop device networks where standard RS-232C isn’t sufficient. Add a bus unit to connect to DeviceNet, enabling field-level device management across hundreds of sensor and actuator nodes.
Frequently Asked Questions
The CS1H-CPU65H supports up to 5,120 I/O bits across the CPU rack and all connected expansion racks. With up to seven racks connected, you can accommodate up to 80 I/O and special function units total — making it ideal for large, densely instrumented machines.
No. Omron built the CS1H-CPU65H with integrated flash memory that automatically backs up your user program and system parameters. There is no battery to maintain or replace, which reduces long-term maintenance costs and eliminates the risk of losing your configuration during an unexpected power outage.
Out of the box, the CS1H-CPU65H includes a peripheral port and RS-232C port. With optional inner boards and CPU bus units, you can add DeviceNet, Controller Link, Ethernet, and additional RS-422/485 serial communications. Omron’s CX-One software suite configures all networks in a single environment.
Yes. Through compatible CPU bus units mounted on the CS1 rack, the CS1H-CPU65H supports MECHATROLINK-II servo coordination and 1-axis position control. It pairs naturally with Omron’s servo drive product lines, making it an excellent hub for multi-axis machine control.
