KROHNE UFM 3030 Service EN - Manual (Page 15)

UFM 3030 15
D+ Communication connection+ For fieldbus communication
D- Communication connection - For fieldbus communication
P/I/C Combined current output (I) digital
output (C) and pulse output (P). See
individual I/C terminal and P terminal
functions
See individual I/C terminal and P terminal
specifications.
The electrical input and output signals can be connected either in active or in passive mode. In
active mode DC supply voltage is provided from the V+ terminal. In passive mode supply voltage
is provided from an external source. Please observe instrument polarity: current (I) is always
flowing towards I, C, P, A1, A2 terminals (current sink).
Note! Never use the active and passive mode at the same terminal simultaneously.
If HART communication is used, do not connect the pulse/frequency output P in active mode.