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Right now, there are a number of sensors (mainly thermocouples and RTDs) connected from the machine to the panel. This means a lot of wires from the machine to the panel.
A way of reducing this wiring is to multiplex these sensors at the source (i.e near the machine) and transmit the data over a 4-20ma current loop. But then, an identifier for each sensor will also have to be added/superimposed on the current value.
HART protocol does exactly this. But is there another way of doing this? Any ideas? Thanks.
A way of reducing this wiring is to multiplex these sensors at the source (i.e near the machine) and transmit the data over a 4-20ma current loop. But then, an identifier for each sensor will also have to be added/superimposed on the current value.
HART protocol does exactly this. But is there another way of doing this? Any ideas? Thanks.