BECKHOFF KS3051 KS Series Analog Input Terminal

Product Overview

The KS3051 (KS3051) is a high-precision, 1-channel analog input terminal from the Beckhoff KS series, specifically engineered for the acquisition of 4…20 mA standard signals. Featuring a pluggable wiring level, this terminal is optimized for applications where rapid field maintenance and modular machine design are critical. The KS3051 offers high-speed signal conversion and includes an integrated sensor supply, making it a versatile interface for pressure, flow, and temperature transmitters in industrial process control. By ensuring accurate 12-bit data conversion and robust galvanic isolation, it minimizes noise-related measurement drift, contributing to stable control loops and reduced equipment downtime.

Technical Configuration

The KS3051 hardware architecture is centered on a single-ended 4…20 mA input stage with a 12-bit resolution. The internal input resistance is 80 Ohm plus a 0.7 V diode voltage drop, ensuring compatibility with standard passive and active sensor loops. A key advantage of this module is the integrated sensor supply, which simplifies external power distribution for field transmitters. The terminal provides 500 V electrical isolation between the K-bus and field potential, protecting the control system from potential ground loops or voltage spikes originating in the field.

Technical Specifications

FAQs

What is the benefit of the pluggable wiring level on the KS3051?

The pluggable wiring level allows the terminal block to be removed and replaced without disconnecting the individual field wires. This significantly reduces downtime during component replacement and ensures that wiring errors are minimized during maintenance.

Does the KS3051 require an external power supply for the transmitter?

No, the terminal is equipped with an integrated sensor supply. This feature allows you to power your 4…20 mA transmitter directly through the terminal’s connection points, reducing the need for external power supplies or distribution blocks.

Is this terminal suitable for use in explosive atmospheres?

Yes, the KS3051 carries ATEX certification (II 3 G Ex nA IIC T4 Gc), meaning it is approved for use in Zone 2 hazardous areas, provided it is housed within an appropriately rated enclosure.

Installation and Operational Recommendations

• Shielding and Grounding: To achieve the stated measuring accuracy (< ±0.3 %), ensure that the signal cable shield is terminated at the cabinet’s central PE point. Avoid routing 4…20 mA signal lines parallel to high-voltage power cables to prevent electromagnetic interference.
• Pluggable Connector Maintenance: During installation, ensure the pluggable wiring level is fully seated and locked into the terminal housing. If the module is subjected to high-vibration environments, periodically verify the integrity of the plug connection to prevent intermittent signal loss.
• Wiring Technique: When stripping conductors, use the recommended 9–10 mm length. Ensure that no stray copper strands extend beyond the terminal entry, as this could cause short circuits within the high-density terminal block.