The RS 485 interface is not electrically isolated from the supply earth!
To supply power to the device, a mains adapter can be connected to Pin 1 (+) and Pin 2 (-)
The analogue interface is not electrically isolated from the supply earth!
The current output is active, i.e. it delivers the signal current to earth and requires no
external supply
The voltage output is also active, i.e. it delivers the signal voltage to earth.
To supply power to the device, a mains adapter can be connected to Pin 1 (+) and Pin 3 (-)
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