Phoenix Contact PLC Logic is a programmable relay micro controller that is ideally suited for small automation applications. It combines the strengths of established relay technology with logic functions in a single package. This smart-relay system allows users to process digital and analog input signals, as well as logic functions and timer modules. The system can process from 16 to a maximum of 48 I/O signals, with two extension modules. Each of the programmable I/O channels can be configured as inputs, two of which can be analog inputs (0 - 10V), or outputs using our LOGIC+ programming software.