BECKHOFF KL1804 Used

The Beckhoff KL1804 is a 4-channel digital input Bus Terminal for 24 V DC signals, engineered for precise, noise-robust signal acquisition in control cabinets and distributed I/O. Its 12 mm High Density housing saves rail space while providing reliable field signal interfacing for PLCs in machine building, process automation, and plant upgrades.

Each channel complies with EN 61131-2 type 1/3, ensuring compatibility with industry-standard sensors and contacts. A typical 3 ms input filter provides effective debounce without sacrificing response time, and 500 V isolation separates K-bus and field potential for resilient operation. The KL1804 features 3-wire connection technology with spring-clamp wiring and status LEDs, requires no address or configuration settings, and is rated IP20 for cabinet installation on a 35 mm DIN rail. Certifications include CE, UL, ATEX and IECEx (Ex ec IIC T4 Gc), as well as DNV for marine environments.

Designed to streamline installation and maximize uptime, this Bus Terminal integrates seamlessly into Beckhoff Bus Terminal systems to accelerate commissioning and standardize your I/O platform, and it comes supported by a 1-year warranty for added project assurance.

• Brand: Beckhoff
• Series: KL Bus Terminal
• Model: KL1804
• Inputs: 4 digital (EN 61131-2 type 1/3)
• Nominal voltage: 24 V DC (-15%/+20%)
• Input filter: typ. 3 ms
• Electrical isolation: 500 V (K-bus/field)
• Protection rating: IP20