Beckhoff KL1104-0000 Digital Input Terminal Module

Beckhoff KL1104-0000 Digital Input Terminal Module is a 4-channel digital input terminal in Beckhoff's KL1xxx bus terminal family. It accepts 24 V DC input signals via 2- or 3-wire wiring and provides four isolated binary inputs to the K‑bus host controller. The input path features a 3 ms filter, delivering a stable 24 V DC level to the PLC process image, which has a 4‑bit width. Electrical isolation between the field side and the K‑bus is 500 V, helping protect the controller from surges. The module requires no address or configuration settings; it plugs into Beckhoff's I/O system with a compact footprint of 12 mm width and overall dimensions of 12 x 100 x 68 mm, weighing approximately 55 g. Current draw from the K‑bus is typ 5 mA. The KL1104-0000 is suitable for reading signals from sensors, pushbuttons, and switches in industrial automation, and it integrates with Beckhoff controllers through the KL bus terminal system for straightforward diagnostics and wiring. The terminal supports standard field wiring conductors (approximately 0.14–1.5 mm²) and is designed for reliable 24 V DC digital input in a variety of automation applications, from machine automation to process control, within Beckhoff’s I/O ecosystem.