In most procurement cycles, KL1904 is considered with Kl2134 Beckhoff, Kl4032 Beckhoff and Kl1501 Beckhoff, giving decision-makers confidence that they’ve chosen the most dependable component.
KL1904 - Beckhoff Bus Terminal Digital Input
Beckhoff introduces the KL1904 Bus Terminal Digital Input, a compact Bus Terminal designed for efficient and reliable digital signal acquisition in automation systems.
| Brand | Beckhoff |
| Product Type | Bus Terminal Digital Input |
| Product | KL1904 |
KL1904 Beckhoff Bus Terminal Digital Input Technical Specifications
| Specification | Value |
|---|---|
| Connection technology | 2-wire |
| Number of inputs | 4 |
| Current consumption K-bus | 48 mA |
| Weight | approx. 50 g |
| Ex marking | ATEX:II 3 G Ex ec IIC T4 GcIECEx:Ex ec IIC T4 Gc |
| Housing - Design form | compact terminal housing with signal LEDs |
| Housing - Material | polycarbonate |
| Housing - Dimensions (W x H x D) | 12Â mm x 100Â mm x 68 mm |
| Housing - Installation | on 35 mm DIN rail, conforming to EN 60715 with lock |
| Housing - Side by side mounting by means of | double slot and key connection |
| Housing - Marking | labeling of the BZxxxx series |
| Housing - Wiring | solid conductor (s), flexible conductor (st) and ferrule (f): spring actuation by screwdriver |
| Housing - Connection cross-section | s*: 0.08...2.5 mm²,st*: 0.08...2.5 mm²,f*: 0.14...1.5 mm² |
| Housing - Connection cross-section AWG | s*: AWG28...14,st*: AWG28...14,f*: AWG26...16 |
| Housing - Stripping length | 8...9 mm |
| Housing - Current load power contacts | Imax: 10 A |
| Current consumption power contacts | â |
The Beckhoff KL1904 Bus Terminal Digital Input is designed to provide stable and accurate digital input acquisition in automation networks. Built with a durable polycarbonate housing and compact dimensions of 12 x 100 x 68 mm, it is lightweight at approximately 50 g yet robust enough for industrial applications. Supporting 2-wire connection technology, the KL1904 accommodates four digital inputs, making it a versatile choice for machine builders and panel designers seeking compact I/O solutions. The module features signal LEDs for each channel, enabling quick and clear status monitoring during operation or troubleshooting.
The KL1904 is designed for seamless integration into Beckhoff’s modular I/O system and is easily installed on a 35 mm DIN rail with secure locking and side-by-side mounting via the double slot and key connection system. It supports a wide range of wiring configurations, including solid, flexible, and ferrule conductors, with connection cross-sections between 0.08 and 2.5 mm². Its K-bus current consumption of 48 mA ensures stable operation without overloading the system. International approvals such as CE, UL, CCC, ATEX, and IECEx validate its compliance with global safety and performance standards. With an IP20 protection rating and vibration/EMC resistance conforming to EN standards, the KL1904 ensures long-term durability in industrial environments.
In industrial applications, the KL1904 Bus Terminal Digital Input is widely deployed for monitoring limit switches, push buttons, and sensor signals in manufacturing plants, packaging lines, and process industries. Its compact design makes it particularly valuable for electrical panel builders and OEMs where space efficiency is critical. Engineering institutes and training centers also use this module for teaching PLC systems and digital input handling, giving students practical exposure to modern fieldbus technologies. Maintenance teams benefit from its easy wiring, dependable design, and clear input indication, reducing downtime during service. With trusted performance, certifications, and scalability, the Beckhoff KL1904 is an excellent choice for industries across India seeking reliable Bus Terminal Digital Input solutions. For complete details, you can request a callback or visit the official Beckhoff product page.
