Beckhoff KL3122 Bus Terminal analog input

The KL3122 is a two-channel analog input terminal from the Beckhoff Bus Terminal series (KL series) for the traditional K-Bus I/O system. It measures bipolar ±10 V voltage signals from sensors, transmitters, and other field devices, converting them to digital values for the controller. It is used where signed voltage signals are required, such as in drives, position feedback, and bipolar sensor outputs. Unlike EtherCAT terminals (EL series), the KL series communicates via the K-Bus and is typically used with Beckhoff Bus Couplers or Bus Terminal Controllers.