4~20milliAmp loop situation
4~20milliAmp loop situation
(OP)
I need to connect 2 reading devices (loads) to the one loop.
(Load 1)is a 0~5volt load not sure maybe 250ohm external resistor across the analogue channel input of the ECO T paperless recorder.
(Load 2) The other is a 0~4volt load over an external 200ohm 1% resistor on the analogue input of the GSM device.
Analogue output is from The sensor an 'Endress & H Prosonic' ultrasonic level sensor with a 4~20mAmp output@5voltsDC.
On this loop i'm going to connect a paperless recorder (load 1) and some how I need to parallel/series or buffer the loop current into a GSM logger device (load 2)
So I have 2 analogue inputs (load 1&2) sharing the one analogue output 4 to 20mAmp loop Therefore what ever the output current is - both analogue inputs need that same reading. How do we do this?
thanking all in advance
(Load 1)is a 0~5volt load not sure maybe 250ohm external resistor across the analogue channel input of the ECO T paperless recorder.
(Load 2) The other is a 0~4volt load over an external 200ohm 1% resistor on the analogue input of the GSM device.
Analogue output is from The sensor an 'Endress & H Prosonic' ultrasonic level sensor with a 4~20mAmp output@5voltsDC.
On this loop i'm going to connect a paperless recorder (load 1) and some how I need to parallel/series or buffer the loop current into a GSM logger device (load 2)
So I have 2 analogue inputs (load 1&2) sharing the one analogue output 4 to 20mAmp loop Therefore what ever the output current is - both analogue inputs need that same reading. How do we do this?
thanking all in advance





RE: 4~20milliAmp loop situation
Gunnar Englund
www.gke.org
--------------------------------------
100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: 4~20milliAmp loop situation
5V + 4V + 5V = 14V
So any supply that supplies more than this but not more than the Prosonic can withstand will do the trick.
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: 4~20milliAmp loop situation
I have done a few single loop in to out analogue but never added a second input channel make sense on the maths thanks to both of you.
John SImkin
Cyplex Communications Sdn bhd
Malaysia
(home in OZ on holiday)
RE: 4~20milliAmp loop situation
There's a handy product on the market which splits a 4-20mA signal in to 2 or 3 separate channels - called a loop splitter. It means you can do what you want to one channel, the other won't be affected.
Take a look here for example ...
http
Hope that helps,
RE: 4~20milliAmp loop situation