Timeline for Multiple receivers in a 4-20mA current loop?
Current License: CC BY-SA 2.5
6 events
| when toggle format | what | by | license | comment | |
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| Nov 30, 2010 at 16:30 | vote | accept | mjh2007 | ||
| Nov 19, 2010 at 14:31 | comment | added | RMAAlmeida | Of course, but the sensor in the question can have a maximum load of 250 ohms. | |
| Nov 18, 2010 at 22:13 | history | edited | tcrosley | CC BY-SA 2.5 |
added 171 characters in body; added 169 characters in body
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| Nov 18, 2010 at 21:57 | comment | added | tcrosley | That's the whole point of current loops -- you can several receivers in series, because the source (current generator) generates a constant current, not a constant voltage. For a 20 ma loop, each 250 Ω resistor will develop .020A*250Ω = 5 volts across it. The power supply must output a voltage equal to or greater than all the voltage drops in the system combined. | |
| Nov 18, 2010 at 21:41 | comment | added | RMAAlmeida | Can you add another 250 ohms resistor in the loop? I thought from the question that the maximum load is only 250 ohms. | |
| Nov 18, 2010 at 20:49 | history | answered | tcrosley | CC BY-SA 2.5 |