04/2012 www.krohne.com
27
ALTOSONIC V
ELECTRICAL INSTALLATION
3
Rear of the I/O rack
Items marked with connections to the UFP-V Flow Processor are pre-wired. It concerns power
inlet and the I/O communication. Connect these connectors in the prescribed way to the flow
processor. In the table below the signals and their respective connections are listed preset on
the terminals on the terminals at the back side of the I/O rack.
Terminal No.
Function / Description
+
-
If applicable pos. or neg. signal level
1 TX-
Modbus RS422/RS485 data comm.
2 TX+
3 RX-
4 RX+
5 Return
6 NC
7
8
4…20 mA current output (e.g. actual flow)
9
10
Power for pulse outputs if passive output must be activated externally
11
12
Pulse output 1
13
14
Pulse output 2
15 16
Reset
totalizers
17 18
Reset
alarms
19 20
Start
calibration
For factory use only
21 22
Stop
calibration
23
24
Failure signal output
25
26
Warning signal output
27
28
Forward flow direction > low flow cut-off forward
29 30
Reverse
flow
direction
> low flow cut-off reverse
31 A
RS485 flow data from UFC-V to UFP-V
32 B
33 Return
PE
Safety grounding
Mains 115 / 230 VAC - 50-60Hz
PE
N
Neutral
N
L
Phase
L
For the connections to PLC’s and other equipment used in the installation, shielded cables shall
be used and the shielding shall be connected to the ground rail using the provided shield
grounding clamps. These shields are part of the CE conformity. Not respecting these rules may
lead to EMC problems. If grounding is prohibited according to other rules or regulations a
capacitor shall be used to get a HF bounding of the shields (capacitor not included with supply).
The electrical safety grounding shall be provided on the green yellow colored connection
terminal, marked with PE. Local installation regulations and general practice shall be respected
