Product Overview
Communications Processor 6ES55218MA21 Siemens Simatic S5 6ES5521-8MA21
The Siemens CP 521 SI Serial Interface communications module for Simatic S5 PLCs is a powerful I/O module with its own central processor. The CP 521 SI can be used for unidirectional and bidirectional data exchange.
Made in Germany
New item in original packaging