KROHNE UFC 030, Краткое руководство по установке и эксплуатации

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10
UFM 3030
3.5 Electrical connection of the signal inputs and outputs
The terminal to connect the electrical signal inputs and outputs consist of 6 connections.
For standard instruments
For instruments with a communication module
P/I/C
For wiring of the signal inputs and outputs it is advised to use unshielded twisted pairs.
Internal circuit of the signal inputs and outputs
of the converter
Terminal Function Specification
⊥ Common ground -
A1
Analog input 1, for temperature
measurement. Configuration via menu
option 3.2.2. and 3.2.3. 0(4) to 20 mA
Ri = 58,2 ohm,
fuse: 50 mA
A2
Analog input 2, for temperature or
pressure measurement. Configuration via
menu option 3.2.4. and 3.2.5. 0(4) to 20 mA
Ri = 58,2 ohm,
fuse: 50 mA
P
Pulse/frequency output. Function can be
set via menu option 3.5.0. I max: 150 mA
Umax: 32Vdc, 24Vac
Max frequency: 2 kHz
I/C
Combined Current output (I) and Digital
input (C).
Current output (I) Incl. Hart
communication
Function can be set via menu option
3.4.0. and 3.6.0. Current output (I): I ≤ 22 mA,
Rload ≤ 680 ohm. Umax = 15Vdc.
Digital input (C): low = 0-5 VDC, high = 15-
32 VDC. Will be switched off when current
output activated.
V+
DC power supply from converter for
active wiring of inputs and outputs 22 VDC at full load, 24 VDC maximum.
I
≤ 100 mA.
D+
Communication con 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.