BECKHOFF

BECKHOFF KS4428 Bus Terminal

SKU KS4428

In stock
  • 12-month warranty
  • Free returns within 30 days
  • Manufacturer: BECKHOFF

  • Product No.: KS4428

  • Country of origin:Germany

  • Product Type: Bus Terminals

  • Payment: T/T, Western Union

  • Weight: 75g

  • Dimensions: 6.8 cm x 1.2 cm x 10.0 cm

  • Shipping port: Xiamen

  • Warranty: 12 months

Description

The BECKHOFF KS4428 is a high-density, 8-channel analog output Bus Terminal designed for space-sensitive automation architectures. Operating within the standard Beckhoff K-bus system, this terminal generates analog output signals in the 4 to 20 mA range with a 12-bit resolution. It is engineered to interface directly with actuators, current-loop indicators, valves, and other process control devices that require precise current signals.

A key distinguishing feature of the BECKHOFF KS4428 is its pluggable wiring level. Unlike standard KL-series terminals, the KS-series design allows the terminal connector block to be detached from the housing. This enables pre-wiring of the control cabinet and fast, tool-free replacement of the terminal electronics during maintenance, significantly reducing machine downtime.

With eight single-ended channels housed in a compact 12 mm width, this terminal maximizes packing density on the DIN rail. It leverages the internal K-bus for communication with the coupler or controller and utilizes the 24 V DC power contacts for field-side signal generation.

Features

  • Eight single-ended analog output channels in a slim 12 mm terminal housing.
  • Pluggable wiring connection level for rapid field installation and simple maintenance.
  • Standard 4 to 20 mA current loop output signal configuration.
  • 12-bit resolution for accurate command signal reproduction.
  • Common ground potential across all 8 output channels.
  • Efficient power distribution utilizing K-bus and 24 V DC power contacts.
  • Compact DIN rail mounting with positive lock connection mechanism.

Applications

  • Control of analog current-loop actuators, control valves, and process dampers.
  • Interfacing with speed controllers and variable frequency drives (VFDs) requiring current reference inputs.
  • Integration of multi-channel process displays and current-controlled signal indicators.
  • Compact machine control panels where high I/O density and rapid terminal replacement are required.

Technical Specifications

Parameter Specification
Manufacturer BECKHOFF
Model KS4428
Product Type Bus Terminal (Analog Output)
Number of Outputs 8
Signal Current Range 4 to 20 mA
Technology Connection Single-ended (common ground)
Resolution 12 bit
Output Error < ±0.2% (relative to end value)
Conversion Time Approximately 8 ms
Load Impedance < 150 Ohm (short-circuit proof)
Electrical Isolation 500 V (K-bus to signal voltage)
Current Consumption (K-bus) Typically 20 mA
Current Consumption (Power Contacts) Typically 60 mA + load
Nominal Voltage Supply 24 V DC via power contacts
Process Image Bit Width Output: 8 x 16-bit data (8 x 8-bit control/status optional)
Wiring Mechanism Pluggable tension-clamp wiring level (KS-series)
Conductor Cross-section (Solid) 0.08 to 1.5 mm² (AWG 28 to 16)
Conductor Cross-section (Fine-wire) 0.14 to 1.5 mm² (AWG 26 to 16)
Stripping Length 9 to 10 mm
Housing Width 12 mm
Operating Temperature 0 to +55 Celsius
Storage Temperature -25 to +85 Celsius
Relative Humidity 95%, no condensation
Protection Class IP20

Installation and Maintenance Guidelines

  1. De-energize the System: Ensure the power supply to the K-bus and the 24 V DC power contacts is switched off before mounting, removing, or wiring the terminal.
  2. DIN Rail Mounting: Slide the terminal onto a standard 35 mm DIN rail (conforming to EN 60715) until the lock snaps firmly in place. Ensure solid alignment with adjacent terminals to secure internal K-bus and power contact connections.
  3. Wiring Setup: Release the spring mechanism using a small screwdriver, insert the stripped conductor (9 to 10 mm preparation), and release the tool. Confirm the wire is held securely in the pluggable terminal block.
  4. Pluggable Housing Operation: For terminal maintenance or replacement, the pre-wired terminal block can be extracted upward, allowing the electronic housing of the terminal to be replaced without removing individual wires.
  5. Grounding and Shielding: To minimize electromagnetic noise in sensitive analog signal loops, utilize shielded cabling and ground the shields in accordance with local industrial automation standards.

FAQ

What is the key difference between the BECKHOFF KS4428 and the KL4428?

The BECKHOFF KS4428 features a pluggable wiring level that allows the terminal connector block to be detached from the electronic housing, whereas the KL4428 has permanent tension-clamp terminals that do not unplug.

How many analog outputs does the BECKHOFF KS4428 provide?

The BECKHOFF KS4428 is equipped with 8 single-ended analog output channels operating in a 4 to 20 mA signal range.

What is the conversion speed and resolution of the BECKHOFF KS4428?

The BECKHOFF KS4428 features a conversion time of approximately 8 milliseconds and provides an output resolution of 12 bits.

Can the BECKHOFF KS4428 be replaced while the system is powered?

No, the system must be fully de-energized before removing or inserting the BECKHOFF KS4428 terminal or detaching its pluggable wiring block to avoid electrical damage or signal disruption.

How are the analog outputs on the BECKHOFF KS4428 electrically isolated?

The BECKHOFF KS4428 provides 500 V electrical isolation between the internal K-bus logic circuitry and the field-side analog signal lines.

View all FAQs →

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Global Express Shipping

  • Standard Delivery: 4-6 Business Days via DHL, FedEx, and UPS.
  • Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
  • Worldwide Coverage: Serving over 150 countries, including rapid delivery to Saudi Arabia and UAE.

Returns & Warranty

  • 30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
  • 12-Month Warranty: Every industrial component is backed by our professional technical warranty.

Orders are processed and delivered Monday-Friday (excluding public holidays).


For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .

TECHNICAL SPECIFICATIONS

Country of origin
Germany

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