EL3021 - Introduction
Fig.21: EL3021EtherCAT Terminal, 1-channel analog input, current, 4 … 20 mA, 12-bit, differential
The EL3021 analog input terminal processes signals in the range 4 … 20 mA. The current is digitized to a resolution of 12 bits and transmitted, electrically isolated, to the higher-level automation device. The input channel of the EtherCAT Terminals is a differential input and has an internal ground potential that is not connected to the power contacts.
Overcurrent and wire break are displayed not only in the process image, but also by an error-LED.
The EL3021 is the 1-channel version and is characterized by its fine granularity and electrical isolation.