The ET-7204 is a multi-function module with 4-channel analog inputs, 4-channel analog outputs, 4-channel digital inputs. It provides various programmable analog inputs (-500 mV, -1 V, -5 V, -10 V, -20 mA, 0 20 mA and 4 20 mA), and analog outputs (-5 V, -10 V, 0 20 mA and 4 20 mA). Each analog input is allowed to configure a proper range with 240 Vrms high voltage protection. Each analog inputoutput can be programmed to accept current or voltage as inputoutput depending upon the position of corresponding jumper.