KS9512 BECKHOFF 24 VDC to 12 VDC Power Supply Bus Terminal

Product Overview

The KS9512 (KS9512) is a high-precision DC/DC converter terminal engineered to provide a stabilized 12 VDC power supply directly from the standard 24 VDC Bus Terminal system. In complex industrial automation environments—such as water treatment plants, power distribution centers, and chemical processing facilities—certain specialized sensors and electronic components require a tightly regulated 12 V voltage rail that is often unavailable in a standard cabinet. The KS9512 addresses this by generating a low-ripple, short-circuit-proof output from the internal E-bus or power contacts. By eliminating the need for external, bulky power converters, this terminal reduces cabinet clutter and minimizes signal noise, ensuring the reliable operation of sensitive instrumentation in high-EMI industrial settings.

Technical Configuration

The KS9512 features a sophisticated power regulation stage that converts a 24 VDC input into a highly stable 12 VDC (+/- 1 percent) output. Designed for low-power applications with an output current of 0.5 A, it is ideal for powering encoders, small solenoids, or specialty measurement devices. The module is housed in a KS-series terminal casing, characterized by its "pluggable wiring" level, which allows for rapid maintenance and terminal replacement without disconnecting individual field wires. Safety and diagnostics are integrated through an overcurrent LED and robust short-circuit protection. Furthermore, its ATEX certification (II 3 G Ex nA IIC T4 Gc) makes it a critical component for hazardous area applications where flammable gases or vapors may be present.

Technical Specifications

Technical FAQs

What is the benefit of the KS-style "pluggable" wiring on this terminal?

Unlike standard Bus Terminals, the KS9512 features a removable wiring level. This allows the electronic module to be swapped out during service while the field wiring remains undisturbed in the connector block, significantly reducing downtime and preventing rewiring errors.

Is the 12 VDC output isolated from the 24 VDC input?

The KS9512 is a non-isolated DC/DC regulator designed to provide a specific voltage rail for 12V-dependent components. For applications requiring full galvanic isolation, verify the specific grounding requirements of your connected 12V sensors.

Can I use the KS9512 in explosive atmospheres?

Yes, the KS9512 carries ATEX II 3 G Ex nA IIC T4 Gc certification. It is suitable for use in Zone 2 hazardous areas, provided it is installed in an appropriately rated enclosure that meets the requirements of the local electrical code.

What does the Overcurrent LED indicate?

The LED provides an immediate visual diagnostic. If the connected load exceeds 0.5 A or a short circuit occurs at the 12 VDC output, the LED will illuminate, and the internal protection circuit will limit the current to prevent damage to the terminal or the upstream 24V supply.

Engineering & Installation Guide

• Thermal Management & Mounting: The KS9512 relies on natural convection for cooling. When mounting on a 35 mm DIN rail, ensure the terminal is installed in a vertical orientation. If the terminal is used at its maximum 0.5 A load in an environment near 55 deg C, ensure at least 10 mm of clearance from high-heat-generating components like motor drives or large power supplies.

• Wiring Precision: Use a standardized screwdriver for spring actuation to prevent damage to the terminal housing. Ensure the stripping length of the wires is exactly 9 to 10 mm. For stranded wires (f), the use of wire-end ferrules is recommended to ensure a gas-tight, vibration-resistant connection conforming to EN 60068-2-6.

• Residual Ripple Sensitivity: With a residual ripple of less than 5 mV, this terminal is suitable for sensitive analog instrumentation. However, to maintain this performance, keep the 12 VDC output leads as short as possible and avoid routing them parallel to high-voltage AC cables or VFD output lines to prevent induced EMI.