Description

The BECKHOFF KS3404 is a 4-channel analog input Bus Terminal designed to process signals in the -10 V to +10 V range with high accuracy. Operating within the Beckhoff K-bus system architecture, this terminal converts analog physical values from the field level into digital process data for the higher-level controller. It features single-ended input technology and a 12-bit resolution, ensuring reliable signal acquisition for standard industrial automation tasks.

A key distinguishing feature of the BECKHOFF KS3404 is its pluggable wiring level. Unlike standard KL-series terminals, the KS-series design allows the complete wiring harness to be plugged or unplugged as a single unit. This design minimizes downtime during maintenance, simplifies pre-wiring steps, and prevents potential wiring errors during terminal replacement.

Features

• 4 single-ended analog inputs designed for -10 V to +10 V signal ranges.
• 12-bit resolution (11-bit resolution when configured for the 0 to 10 V range).
• Pluggable wiring level (KS series housing) for efficient installation and servicing.
• 500 V electrical isolation between the K-bus and the signal level.
• No hardware address or configuration switches required, enabling automatic configuration via the bus coupler.
• Compact 12 mm housing width to optimize control cabinet space.

Applications

• Analog voltage monitoring in machine control and industrial process environments.
• Integration of analog sensors and transducers with standard voltage outputs into K-bus I/O systems.
• Control cabinet builds requiring pluggable terminal connections for rapid deployment or modular machine designs.

Technical Specifications

General

Signal and I/O

Electrical

Connection

Mechanical & Environmental

Compliance and Certifications

Installation Guidelines

1. Power Off: Disconnect and lock out all power sources feeding the Bus Terminal system and field devices before installation or removal.
2. Mounting: Snap the terminal onto a standard 35 mm DIN rail (conforming to EN 60715). Ensure the double slot-and-key connection is securely aligned with adjacent terminals.
3. Plugging Wiring Level: Insert the wired connector block into the terminal housing until it clicks into place.
4. Wiring: Connect the signal wires according to standard single-ended voltage measurement layouts using a screwdriver to actuate the spring-clamp terminals. Strip wire insulation back 9 to 10 mm.
5. System Verification: Ensure correct installation of shield connections where necessary to protect sensitive analog signals from external electromagnetic interference.

Replacement Recommendations

When replacing an existing BECKHOFF KS3404, the pluggable wiring level allows maintenance personnel to swap the physical electronics block without disconnecting individual wires from the spring clamps. Ensure that the bus segment is fully de-energized before removing the connector block or pulling the terminal off the DIN rail. Verify that the successor or replacement model matches the configuration requirements in the TwinCAT system manager.