Beckhoff KL1904 K-Bus Terminal Module 4 Channel

Beckhoff KL1904 is a TwinSAFE four-channel digital input terminal for the K-Bus safety network, delivering four 24 V DC digital inputs to a safety controller. As a KL-series safety terminal, it plugs into Beckhoff Bus Terminal hardware and integrates with TwinCAT software to monitor safety devices and signals within industrial automation. The module communicates over the K-Bus and offers a typical 4 ms response time for reading inputs and updating the K-Bus, enabling deterministic safety logic in time-critical applications. It is intended for safety architectures in which 24 V DC digital inputs must be read reliably by a safety controller, and can be combined with other safety and standard I/O modules to form compact safety input blocks within a Beckhoff control system.