7 Connection
7.3 Connect the pick ups and temperature sensors
7.3 Connect the pick ups and temperature sensors
Personnel qualification:
o
Electrician
Personal protective equipment:
o
Work clothing
Aids:
o
KRAL tool set
o
Diagonal cutter
o
Wiring diagram
ATTENTION
Device damage through incorrect connection
► Observe pin assignment and connection data of the electronic unit
► Before connecting the electronic unit to the power supply, ensure that all consumers (sensors) are
connected correctly. See the wiring plan.
Requirement:
ü
Pick ups for both flowmeters installed
ü
Temperature sensors for both flowmeters installed
1.
Remove the rear device cover.
2.
Use the diagonal cutter to adapt the cable entry to the cable diameter.
3.
Pull the cables of the sensors through the cable entries.
4.
Connect the cables for pick ups of flowmeter A and B in accordance with the wiring diagram on
the electronic unit.
5.
Connect the cables for temperature sensors in accordance with the wiring plan at flowmeter A
and B.
6.
Check the resistance values at cables for temperature sensors on the side of the electronic unit,
see the table below and remarks in the wiring plan.
7.
Connect the cables for temperature sensors in accordance with the wiring plan at the electronic
unit.
8.
Replace the rear device cover.
Check between
Resistance
Compensation cables
<1 Ω
Measuring lines Pt100
Depending on temperature:
100 Ω (0 °C) – 150 Ω (130 °C)
Tab. 10: Resistance values at temperature sensors
7.4 Connecting analog outputs, relay outputs and pulse outputs
Personnel qualification:
o
Electrician
Personal protective equipment:
o
Work clothing
Aids:
o
KRAL tool set
o
Diagonal cutter
o
Wiring diagram
DANGER
Risk of death resulting from electric shock if the connection of hazardous potentials (>48 V) to
the potential-free relay outputs (orange terminals 9 - 11 and/or 42 - 44) is required.
► Before wiring these potential-free relay switch contacts, ensure that all wires for this purpose are
potential-free.
Operating instructions
OIE 12en-GB Edition 2020-03
19