KROHNE SU 600 EN - Manual (Page 17)

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In passive mode, the sensors are not powered - only
the measured value is transmitted. This input is for
transmitters with their own separate power supply
(sensors in four-wire version). Furthermore,SU 600
can be connected to an existing circuit like a
standard current meter.
SU 600 - 4 … 20 mA signal conditioning 17
Connecting to power supply
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