The EL5021-0090 EtherCAT Terminal is used for the direct connection of a measuring probe or encoder with sinusoidal, differential voltage output 1 VSS. Input frequencies of max. 250 kHz can be evaluated. The current counter reading can be zeroed (reset) or stored separately via the C track of the encoder, which is also called reference mark. The 5 V supply to the encoder is provided directly via the terminal connection points. The EL5021-0090 features amplitude and frequency error detection of the input signals.

The EL5021-0090 also supports TwinSAFE SC (TwinSAFE Single Channel). Thereby it is possible to make use of standard signals for safety tasks in any network or fieldbus.

Special features:

• store, lock, set counter
• Diagnosis: Frequency error and amplitude error of input signals
• integrated frequency measurement
• integrated 5 V DC encoder operating voltage

The analog input signal is processed, interpolated and made available as a 32-bit count value. The count value is a combination of the number of whole periods, max. 24 bits, and the value within one sine period, with max. 13 bit resolution. The EL5021-0090 also provides an internal frequency measurement. It also supports synchronous reading of the encoder value together with other input data in the EtherCAT system via the high-precision EtherCAT distributed clocks (DC).

https://www.beckhoff.com/vi-vn/products/i-o/ethercat-terminals/el5xxx-position-measurement/el5021-0090.html