Beckhoff KL1404 4-Channel Digital Input Bus Terminal

Product Overview

The KL1404 (KL1404) is a 4-channel digital input Bus Terminal module from Beckhoff, engineered to acquire binary 24 V DC control signals from the process level. It provides reliable, electrically isolated signal transmission to a higher-level automation controller. Featuring an integrated 3 ms input filter, the module effectively eliminates "bouncing" from mechanical switches, ensuring clean and accurate signal processing. It is part of the comprehensive Beckhoff Bus Terminal system and is designed for high-density, rail-mounted automation architectures.

Technical Configuration

The KL1404 is designed for direct connection of 2-wire sensors and is configured for 24 V DC operation. It complies with EN 61131-2 (type 1/3) input specifications. The module is housed in a compact 12 mm wide terminal housing, allowing for efficient space usage in control cabinets. It utilizes the K-bus for internal communication and features signal LEDs for each of the four channels to provide immediate visual feedback on the operational state of the inputs.

Technical Specifications

FAQs

Is the KL1404 compatible with my existing Bus Terminal system?

Yes, the KL1404 is a standard component of the Beckhoff Bus Terminal I/O system and can be mounted side-by-side with other compatible terminals using the standard double slot and key connection.

Does this module require any manual configuration or addressing?

No. The KL1404 is an "auto-configured" module; it requires no address or configuration settings by the user. The automation controller automatically detects the terminal upon initialization.

What is the purpose of the 3 ms input filter?

The 3 ms filter is specifically tuned to suppress contact bounce commonly associated with mechanical switches and relays, ensuring that the automation controller receives a stable signal without erroneous rapid-fire switching.

Can I use the KL1404 in an explosive atmosphere?

Yes, the KL1404 carries relevant safety certifications (including ATEX and IECEx) for use in hazardous areas; please verify the specific hazardous zone classifications in your technical documentation before installation.

Installation Guidelines and Best Practices

• Mounting: The terminal is designed for mounting on standard 35 mm DIN rails (conforming to EN 60715). Ensure the locking mechanism is securely engaged to maintain proper contact with the internal bus.

• Wiring: The terminal supports solid and flexible conductors. When using flexible wires, ensure the use of appropriate ferrules to guarantee a reliable, gas-tight connection within the spring-actuated terminals.

• Environment: While the terminal is rated for IP20, ensure the cabinet is free from excessive dust or condensation. Maintain the ambient temperature within the 0 deg C to 55 deg C operating range to ensure long-term reliability.