BECKHOFF KS4404 Bus Terminal Analog Output Module

Description

Engineered for highly reliable industrial automation environments, the BECKHOFF KS4404 is a 4-channel analog output terminal designed to generate precise signals in the 0 to 10 V range. This module converts digital control values from the controller into analog process signals with an increased 12-bit resolution. Each output channel utilizes single-ended technology, ensuring optimal signal processing and high immunity to electrical interference.

The defining feature of the KSxxxx terminal series is its pluggable wiring level. This mechanical design allows the terminal block to be easily disconnected and replaced without removing the pre-configured field cables, significantly reducing downtime during maintenance. Grounding, shielding, and galvanic isolation of 500 V between the K-bus and the field-side signal voltage protect the main controller from voltage spikes and ground loops, rendering this module ideal for distributed control systems (DCS) and PLC networks.

Features

• Four single-ended analog output channels operating from 0 to 10 V.
• High-precision 12-bit conversion resolution for critical process variables.
• Pluggable connection level for fast, toolless terminal replacement.
• Robust electrical isolation of 500 V between the internal K-bus and the output channels.
• Short-circuit-proof outputs capable of driving resistive loads greater than 5 kOhm.
• Support for standard 35 mm DIN rails via double-slot and key housing locks.

Applications

• Speed control and setpoint transmission for variable frequency drives (VFDs).
• Actuator positioning and control valve regulation in HVAC systems.
• Analog input control for downstream industrial controllers and display panels.
• Process instrumentation control in chemical, power generation, and water treatment plants.

Technical Specifications

Connections and Interfaces

Installation Guidelines

• Mounting: Mount the bus terminal horizontally or vertically on a standard 35 mm DIN rail conforming to EN 60715. Ensure the locking latch engages securely.
• Wiring: Utilize a small screwdriver to actuate the spring connection mechanism. Strip cables precisely to a length of 9 to 10 mm to guarantee full insertion contact without exposing bare conductors.
• Shielding and Grounding: Shielded analog cables are highly recommended. Connect the cable shield to a low-resistance functional earth ground as close to the terminal entry point as possible to mitigate high-frequency electromagnetic noise.
• Ventilation: Maintain sufficient clearance above and below the terminal block assembly to allow passive convection cooling, preserving the operating temperature range below 55 degC.

Compliance and Certifications

• CE: Conforms to relevant European directives.
• UL: Listed for safety compliance standards.
• ATEX: II 3 G Ex nA IIC T4 Gc (Certified for Zone 2 hazardous areas).
• DNVGL: Approved for maritime and offshore installations.