Watson & Sons 520DUN user manual Scaling analogue input

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22.4 Scaling: analogue input

It is possible to scale 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 2 connector (J8). Ground to the 0V terminal of the same connector.

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 2 connector (J8). When

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

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

The speed of the pump as set by Analogue 1 is scaled in proportion to the signal from Analogue 2 according to the formula y=as, where a is the speed set by Analogue 1, s is the scaling set by Analogue 2 (0V or 4mA = 0, increasing linearly to 10V or 20mA = 1), and y is the scaled rotation speed. If Analogue 2 has been set for an inverted response, the reverse is true. See 18.2 Analogue in the Setup menu.

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

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Contents Watson-Marlow 520DuN IP66/NEMA 4X pumps ContentsPublication history 104 Decontamination certificate 105 Declaration of incorporation Declaration of conformityCased pumps, 620 cased pumps and 720 cased pumps Five year warrantyConditions ExceptionsPackaging disposal When you unpack your pumpInspection Components supplied 520DuN pump, IP66 Nema 4X modelsStorage Information for returning pumpsSuitable applications Peristaltic pumps an overviewHow they work Safety notes Page Pump specifications 520DuN, IP66 Nema 4X model Remote controlManual control Analogue controlNema IP Ingress Protection and Nema definitionsPump specifications Harmonised StandardsStandards Other520DuN IP66/NEMA 4X model Unit weights DimensionsDo’s and do not’s Good pump installation practiceGeneral recommendations Page Connecting this product to a power supply Page Page Start-up check list Switching the pump on for the first timeAnalogue input First-time start-up defaults LanguageSpeed User trimPump is now ready to operate Manual operation Keypad functions in manual modePage Page Manual operation and remote digital inputs and outputs Keypad lockKeypad beep Keypad functions in menu screens Main menuMain menu entry PIN-secure process protection Calibrate Tube Head and tubeCalibration dose Page Setup menu SetupTrim Analogue Input 1 speed Program Scaling stroke TrimAlternatively DisplayBaud Pump number18.7 Xon/Xoff Stop bitsFlow units Run time Outputs General alarmParameters are Run / stopPage Remote stop Page Auto-restart Backlight Set maximum speedLanguage 18.15 ROMBeep DefaultsSecurity code Exit Pin out detailsTo dispense a master dose MemoDoseTo repeat the dose Changing dosing speedExit To remove the 520N watertight module Automatic control wiring22.1 520N module removal and replacement To replace the 520N watertight module Wiring up Page Do not strap the control and mains power cables together Speed analogue input Scaling analogue input Tachometer frequency output Speed analogue outputDirection input SwitchRun / stop input Auto / manual toggle input Tube monitor 520N module Wire colourMemoDose input Leak detection inputImportant pump status outputs Outputs 1, 2, 3Supply voltages DC Voltage Max load Typical use 22.14 RS485 inputAutomatic control and operation How to get into auto operationHow to get out of auto operation Emergency stop Network control and operation How to get into network operationHow to get out of network operation Command Parameters Meaning 24.1 RS485 command stringsTroubleshooting Error condition Suggested action Error codesDrive spares Drive maintenance520REL/520REM/520REH 520R, 520R2 and 520RE pumpheadsIdentification of parts To reposition the track Pumphead position, removal and replacementRotor removal Rotor replacementOpening the pumphead guard 29 520R, 520R2 and 520RE installation29.2 520R and 520R2 tube loading 29.3 520RE fitting the drain port 520REL Pressures Up to 2 bar 30 psi 29.4 520RE Element loadingPressures Up to 4 bar 60 psi Up to 7 bar 100 psi 2mm and 6.4mm Industrial SanitaryPage 29.5 520RE Element connection Sanitary 3⁄4in mini-Tri-clamp connectorsIndustrial quick-release connectors 30 520R, 520R2 and 520RE maintenance Chemical Cleaning precautions 31 520R, 520R2 and 520RE rotor settingsGeneral guide to cleaning with solvents 520R/520R2 520REL/520REM/520REH Pumphead spares520R and 520R2 Flow ratesPumping conditions 520RE 220rpm Continuous tubingElements Performance curves Page Page Page 6mm wall tubing for 520R pumpheads Tubing and element part numbersInch Marprene Bioprene Pumpsil 4mm wall tubing for 520R2 pumpheads913.A008.024 Inch Chem-Sure Sta-Pure102 4mm wall elements for 520RE pumpheadsSanitary Inch Bioprene TM Sta-Pure 103 35 520 series pumping accessoriesAccessory Description Part code Pump Compatibility 104 TrademarksPublication history 105 Decontamination certificateRGA number Signature Your position Date

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.

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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.
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