6ES7321-1BH02-0AA0 for Digital input SM 321, isolated, 16 DI, 24 V DC, 1x 20-pole

The SIMATIC S7-300 is used in many applications worldwide and has been proven successful millions of times. The SIMATIC S7-300 universal Controllers saves on installation space and features a modular design. A wide range of modules can be used to expand the system centrally or to create decentralized structures according to the task at hand, and facilitates a cost-effective stock of spare parts. SIMATIC is known for continuity and quality. You want your application to be future-proof? Then you should look at the advantages and new possibilities of the SIMATIC S7-1500 and the engineering with TIA Portal

SIMATIC S7-300 and S7-400 are and remain fully developed, proven controllers. Many new requirements regarding handling and performance can no longer be fully met with the traditional architecture. This has led to the development of the next generation of S7-1500 controllers with improved system properties. The basic SIMATIC properties have been retained for compatibility.

Floating-point arithmetic:
With floating-point arithmetic, even complex arithmetic functions can be used effectively.

User-friendly parameter assignment:

High-speed instruction processing:
Instruction execution times from 4 ns open up completely new application options in the low-end and mid performance range.There is only one single software tool with a uniform operator interface for parameterizing all modules. This saves on induction and training overhead.