KS3201 BECKHOFF Single-Channel RTD Input Terminal (Pt100, Ni100)

Product Overview

The KS3201 (KS3201) is a high-precision, single-channel analog input terminal designed for direct temperature measurement via Resistance Temperature Detectors (RTDs). Compatible with a vast array of sensor types, including Pt100, Pt1000, and Ni100, the KS3201 is a versatile B2B solution for industrial thermal monitoring. The "KS" designation highlights its pluggable wiring level, which allows for the rapid exchange of the terminal housing without disturbing the field wiring—a critical feature for minimizing downtime in continuous process environments like chemical processing, food sterilization, and climate control.

Hardware Architecture and Sensor Integration

The KS3201 utilizes sophisticated 16-bit measurement logic to provide a resolution of 0.1 °C per digit. It supports both 2-wire and 3-wire connection methods. The default 3-wire configuration is highly recommended for industrial use, as it automatically compensates for the resistance of the sensor leads, ensuring accuracy even with long cable runs.

The terminal is factory-calibrated for high linearity across a wide temperature spectrum, ranging from -200 to +850 °C for Platinum sensors. Beyond standard temperature sensing, the KS3201 can also function as a high-precision ohmmeter, measuring resistances up to 5 kΩ, making it suitable for monitoring potentiometers or custom resistive transducers. For system safety, the module features open-circuit recognition, immediately flagging a wire break to the controller to prevent erroneous process decisions.

Technical Specifications

Technical FAQs

How do I switch between 2-wire and 3-wire modes?

The KS3201 is set to 3-wire mode by default. You can change the connection technology and sensor type (e.g., switching from Pt100 to Pt1000) via the Bus Coupler or the master controller's configuration software (like TwinCAT).

What is the benefit of the 200 ms conversion time?

While 200 ms is slower than some high-speed analog terminals, it is optimized for temperature measurements, which generally change slowly. This duration allows for high-precision integration and noise filtering, ensuring a stable and reliable temperature reading in electrically noisy environments.

Is this terminal suitable for marine applications?

Yes. The DNV GL certification confirms that the KS3201 meets the stringent environmental and mechanical standards required for offshore and maritime engineering.

Engineering & Installation Guide

• Lead Compensation: When using 3-wire technology, ensure all three conductors have the same cross-section and are made of the same material. This symmetry is vital for the terminal to accurately calculate and cancel out lead resistance.

• Wiring and Termination: The KS series uses pluggable spring-clamp terminals. Use a screwdriver to actuate the spring, and ensure a stripping length of 9 to 10 mm. For high-vibration environments, the spring-clamp design provides a superior, maintenance-free connection compared to traditional screw terminals.

• Hazardous Areas: This terminal is ATEX certified (II 3 G Ex nA IIC T4 Gc), making it safe for use in Zone 2 hazardous locations. Ensure it is installed in an IP54-rated enclosure if required by local regulations for explosive atmospheres.

Engineering Advantages

The KS3201 provides an industrial-grade bridge between physical temperature and digital logic. Its ability to handle multiple sensor types and resistance measurements makes it an excellent "universal" RTD module, reducing the need for multiple specialized spare parts. The 500 V galvanic isolation protects the K-bus backplane from potential field-side electrical anomalies. With its compact 12 mm design and pluggable wiring, the KS3201 offers B2B machine builders a robust, easy-to-service, and globally certified solution for precise thermal management.