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Omron makes modular PLCs more affordable

Posted: 15 Apr 2004 ?? ?Print Version ?Bookmark and Share

Keywords:omron? cj1? programmable logic controllers? cpu? cj1m-cpu11?

Omron Corp. has expanded its CJ1 series of Programmable Logic Controllers (PLC) by introducing a range of innovative entry-level CPUs with all the power of a modular PLC system but without the associated cost.

"The additions to the CJ1 family mean that Omron can now provide a modular PLC to fit any application and budget," said Theo Mattaar, product marketing manager for PLCs. "For machine builders who want to scale their machines, there's always a CJ1 to suit, without having to change PLC families."

According to the company, the CJ1M-CPU11 and CJ1M-CPU21 make it affordable to start using modular PLCs even at the lowest levels of machine automation. The devices pack the same features as the other CPUs in the family, but with a minimum overhead.

The CJ1M-CPU11 has the complete instruction set of the larger CPUs, and provides powerful functions for sequencing, data processing, arithmetic and control. Meanwhile, the CPU21 version offers all of the features of CPU11 and includes built-in high-speed I/O functionality.

The CPU21's built-in I/O with four interrupt inputs, two fast (100kHz) counters and two pulse train outputs (CPU2x) provides exceptional performance for position control. "Of course the CJ1M-CPU11/21 are compatible with all existing CJ1-series units," said Theo. "You can install up to ten powerful I/Os and special function units such as communication, control, or analog and digital I/O units. And if you run out of power or capacity with the CPU11/21, you can easily replace it by another CJ1 CPU, with capacities up to 120kSteps program memory, 2560 I/O points and down to 20ns binary execution time. Again, one PLC family is all you need."

The CJ1M-CPU11/21 follows in the footsteps of the other members of the CJ1 family by offering seamless communications over a wide range of open-standard networks, cost-effective proprietary networks, or fully user-configurable serial or CAN-based systems. As with all of Omron's CJ1 CPUs, the devices come with two serial interfaces as standard.

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