Function of Racks in PLC – Types of SIEMENS S7-400 PLC Racks
In this article, you will learn the function of racks in a PLC system and the types of Siemens S7-400 PLC racks.
PLC Remote IO racks
PLC Input Output Modules
Every programmable logic controller must have some means of receiving and interpreting signals from real-world sensors such as switches, and
