Omron CJ1M-CPU21

Brand: Omron
Model: CJ1M-CPU21

Inventory situation: Goods are available in stock.

Product features

Omron's CJ1M-CPU21 is a tiny CPU module with built-in I/O from the CJ1 family. The minimum execution time for basic instructions is 0.10 microseconds, while the minimum execution time for special instructions is 0.15 microseconds. This high speed enables the Omron CJ1M-CPU21 to respond promptly to control signals, resulting in smooth functioning of industrial equipment. It employs stored program control and enables both cyclic scanning and immediate processing modes to suit various control requirements in industrial production. These processing performance characteristics are critical reference indications for people looking to learn more about the Omron CJ1M-CPU21 specs.

In terms of memory, the Omron CJ1M-CPU21 has 5k steps of user program memory and 32K words of data memory, providing ample room for storing user programs and data. It also contains several built-in memory sections, such as W relays, holding relays, and special auxiliary relays, as well as 4096 clocks and counters. These memory resources allow the Omron CJ1M-CPU21 to handle moderately complicated control tasks, making it ideal for the majority of small and medium-sized industrial automation systems. The Omron CJ1M-CPU21 also supports MS-DOS format compact flash memory cards and includes a battery backup capability to prevent data loss.

The Omron CJ1M-CPU21 features 160 I/O points, which include 1 interrupt input and 1 PWM output. It has built-in high-speed counters and pulse output features, which allow for high-precision control and satisfy the demands of high-speed operating jobs in industrial production. This Omron tiny CPU module can be joined directly without a foundation, and the system can support a maximum of 20 units, including 10 CPUs. However, it should be mentioned that the Omron CJ1M-CPU21 does not support expansion racks or devices, which is an important aspect of this model.

Specifications

Model	CJ1M-CPU21
Series	CJ1 Series
Port Type	RS232C, Host Link
Total I/O Points	160 points
Number of Tasks	288 total
Basic Instruction Execution Time	0.10 μs (min)
Dedicated Instruction Execution Time	0.15 μs (min)
Rated Current Consumption	0.64 A (5V DC)

Application scenarios

Small-scale production lines are one of the most typical applications for the Omron CJ1M-CPU21. In small enterprises such as electronic component assembly, food packaging, and hardware processing, the Omron CJ1M-CPU21 is in charge of regulating conveyors, motors, sensors, and other machinery. Its 160 I/O points and quick instruction execution speed ensure that each link in the production line runs smoothly, increasing production efficiency and decreasing manual errors. For example, in a small food packaging line, the Omron CJ1M-CPU21 may manage the packing speed, detect whether the product is in position, and automatically stop the machine if an irregularity occurs, which is a common application for the Omron CJ1M-CPU21 in small production lines.

The Omron CJ1M-CPU21 is also commonly used for packaging machinery control. Packaging machinery such as automatic bagging machines, sealing machines, and labeling machines require reliable and precise control, which the Omron CJ1M-CPU21 can fully meet. It provides PWM output and high-speed counter features, which allow for precise control of the motor's rotation speed and the movement of the mechanical arm, ensuring packaging consistency and precision. Simultaneously, its tiny size reduces installation space, making it ideal for packaging machinery with limited space. Many packing machine manufacturers use the Omron CJ1M-CPU21 as the primary control module to improve the stability and reliability of their machines.

FAQ

Q: What is the Omron CJ1M-CPU21 PLC?

A: The Omron CJ1M-CPU21 is a tiny mid-range CPU from the SYSMAC CJ1M series. It was created as a low-cost controller with a robust feature set, including built-in I/O points and high-speed pulse operations, making it ideal for applications such as basic positional control and machine automation.

Q: Is the Omron CJ1M-CPU21 still available for purchase?

A: No. The Omron CJ1M-CPU21 has been officially discontinued (end-of-life). It is no longer manufactured by Omron. Omron recommends a direct replacement model for new projects or reliable long-term maintenance, though it may be available through third-party resellers or on the surplus market.

Q: What accessories are needed for the built-in I/O?

A: The CPU's built-in I/O points do not come with pre-attached connectors. You must buy a connector separately, such as the XG4M-4030-T MIL cable connector.