EL3021, EL3022, EL3121, EL3122 | 1-, 2-channel analog input terminals 4…20 mA, differential input, 12/16 bits

The EL3021, EL3022, EL3121 and EL3122 analog input terminals process signals in the range between 4 and 20 mA. The current is digitised to a resolution of 12 bits (EL3021/EL3022) or 16 bits (EL312/EL3122), and is transmitted, electrically isolated, to the higher-level automation device. The input channels of the EtherCAT Terminals have differential inputs and possess a common, internal ground potential. The EL3021 and EL3121 are the single-channel versions and are characterised by their fine granularity and electrical isolation. The EL3022 and EL3122 versions combine two channels in one housing. An open lead or overload condition are detected. The terminal status is relayed to the controller via the E-bus. The EtherCAT Terminals indicate their signal state by means of light emitting diodes. The error LEDs indicate an overload condition and a broken wire.