voltage requirements for current output
voltage requirements for current output
(OP)
LS,
When connecting analog output signals (4-20 mA) from flow computers or PLC's, we sometimes run into the problem that the voltage is too low for the input of the connected equipment. (We supply max 15 V, and some equipment requires at least 18 V on the input side). This is not due to the resistance in long or thin cables etc.
Is there a standard for 4-20 mA analog signals, about the height of the voltage to avoid these problems?
thanks,
DYV
When connecting analog output signals (4-20 mA) from flow computers or PLC's, we sometimes run into the problem that the voltage is too low for the input of the connected equipment. (We supply max 15 V, and some equipment requires at least 18 V on the input side). This is not due to the resistance in long or thin cables etc.
Is there a standard for 4-20 mA analog signals, about the height of the voltage to avoid these problems?
thanks,
DYV





RE: voltage requirements for current output
That's a lot of voltage. Usually, inputs never need more than 10 volts (500 ohms).
The "standard" supply voltage seems to be 24 V - so that would probably solve your problem.
Gunnar Englund
www.gke.org
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100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: voltage requirements for current output
You always have to look at the transmitter's specs and see if you have the necessary compliance voltage.
I would say that 15V will be a little limiting.
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: voltage requirements for current output
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Sometimes I only open my mouth to swap feet...
RE: voltage requirements for current output
respectfully
RE: voltage requirements for current output
RE: voltage requirements for current output