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Watson & Sons 520DUN user manual Speed analogue input

Models: 520DUN

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22.3 Speed: analogue input

It is possible to control the speed of the pump remotely by one of these methods: a voltage analogue signal within the range 0-10V; or a current analogue signal within the range 4-20mA; or a remote potentiometer using the 10V supply at J7.

The analogue process signal must be applied to the i/p ter- minal of the Analogue 1 connector (J5). Ground to the 0V terminal of the same connector. The pump will provide an increasing flow rate for a rising control signal (non-inverted response) or an increasing flow rate for a falling control sig- nal (inverted response). See 16.2 Analogue in the Setup menu.

4-20mA circuit impedance: 250Ω.

For voltage mode, 0-10V, a stable, reliable voltage source can be used with a DC voltmeter. Circuit impedance: 22kΩ.

Inverting the response is set up in software. Do not invert the polarity of the termi- nals.

A remote potentiometer with a nominal value of between 1k and 2k with a minimum of 0.25W should be wired between the ter- minals of the Rem-pot connector (J7) and the i/p terminal of the Analogue 1 connector (J5). When

using a remote potentiometer, do not apply a voltage or cur- rent control input signal at the same time. The speed control signal will require calibration relative to the minimum and maximum settings of the potentiometer. This is done in soft- ware - see 18.1 Trim in the Setup section.

When using a remote potentiometer, it is important to set the analogue input to volt- age in the Setup menu. Otherwise the reference voltage supply from the Rem-pot connector will be overloaded and will not provide a full 10V.

Watson-Marlow 520DuN IP66/NEMA 4X User Manual

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Watson & Sons 520DUN user manual Speed analogue input
Page 63 Page 65

520DUN specifications

Watson & Sons 520DUN is a state-of-the-art model that has garnered attention for its exceptional performance and innovative technologies. Designed for agricultural applications, this machine combines durability, efficiency, and ease of use, catering to the needs of modern farmers.

One of the standout features of the 520DUN is its robust engine. Equipped with a high-performance diesel engine, it offers impressive horsepower, allowing it to handle a variety of demanding tasks with ease. This engine is designed for fuel efficiency, ensuring that operators can complete their work without frequent refueling. The powertrain is complemented by an advanced transmission system that enables smooth gear shifts, enhancing operator comfort during long hours of operation.

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Safety is also paramount in the design of the 520DUN. It features reinforced safety measures, including roll-over protection systems and visibility enhancements, ensuring operator safety during operations.

In summary, the Watson & Sons 520DUN represents the pinnacle of agricultural machinery with its powerful engine, remarkable load capacity, precision technology, and ergonomic design. It is tailored for those who seek reliability and efficiency in their agricultural endeavors, making it a noteworthy choice in today's competitive market.