Reliance Automax. In stock ships today. 45C400. 45400. Input/Output. Logic Processor. The 45C400 Logic Processor uses dedicated logic to solve ladder functions at extremely high speed. This processor has 4 I/O ports to communicate directly to four rails for up to 64 digital or 16 analog I/O, or to four local heads for up to 256 digital or 64 analog I/O, or to any mix of I/O rails and local heads. Communications take place at 250K baud and data integrity is insured using parity. LED\'s are used for status indication.