Schneider Electric Lexium 17S Series - Manual (Page 75)

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Analog Input Connection
Analog Inputs The following diagram shows the connections between the two fully programmable,
differential analog inputs on the 17S drive and a user device. (Refer to the list of
pre-programmed functions contained in the UniLink online help.)
Note: The Analog Com must always be connected to the user device Com as a
ground reference.