The E-Plus is a single meter run (up to three meter runs), custody flow computer for Liquid or Gas Application featuring: Three 4-20mA/1-5VDC Analog Inputs; One RTD Input (direct connection to the flow computer uses two of the analog input channels); One 4-20mA Analog Output; One Digital/Status Input; Two Digital/Switch Outputs; Two Frequency Inputs (frequency input uses one digital input or output channel); and One RS-232/RS-485 Communication Port (2nd port is available with a WDS Upgrade).