EL3632 is a digital input terminal from Beckhoff for their EtherCAT I/O system.

The Beckhoff PLC model you mentioned, KL2022, is a digital input terminal from the Beckhoff EtherCAT I/O system.

The Beckhoff KL2032 is a digital input terminal in the Beckhoff PLC system.

The Beckhoff KL2124 is a digital input module for Beckhoff PLC systems.

The Beckhoff KL2212 is a digital input terminal module for Beckhoff PLC systems.

The Beckhoff EK3100 is an EtherCAT Coupler module for the Beckhoff TwinCAT system.

The Beckhoff EK9000 is an EtherCAT Coupler module used in the Beckhoff EtherCAT system.

Beckhoff plc EK9160 is a modular I/O bus coupler in the EtherCAT series.

Beckhoff PLC EK9500 is an EtherCAT Coupler module.

EL3602 is a 2-channel analog input terminal of the Beckhoff EtherCAT I/O system.