KROHNE UFM 3030 Service EN - Manual (Page 14)

14 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
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
Ω
,
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
Ω
,
fuse: 50 mA
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
Ω
. Umax = 15Vdc.
Digital input (C): low = 0-5 VDC, high = 15-
32 VDC. Will be switched off when current
output activated.
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
V+ DC power supply from converter for
active wiring of inputs and outputs 22 VDC at full load, 24 VDC maximum. I
≤
100 mA.