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4.
ELECTRICAL CONNECTIONS
Before electrical connections are made turn off the power supply first. If not observed the electronics can be
damaged as a result.
Only a qualified electrotechnical engineer may install the device.
•
Unscrew the four screws and remove the cover of the housing.
•
The screw terminals are located in the bottom part of the housing.
•
For the electrical connection of the flowmeter a six-wire cable is needed (e.g. 6 x 1 mm
4.1.
Connection diagram
•
Screw terminal OUT 1-1 for the analogue output is internally connected with GND.
•
The housing should be grounded to achieve optimal electromagnetic compliance.
4.1.1.
Relay and pulse output, internal switching
The relay switch and pulse outputs are both potential free.
4.1.2.
Connection with optional plug for power supply and outputs (order code Q)
Connection plug for the
power supply and ana-
logue outputs (rear view of
the terminals)
Modbus data A / M-Bus
Modbus data B / M-Bus
p
I
4...20mA
mA_Input
OUT 1-2
V
mA
or
OUT 1-1
OUT 2-1
or
OUT 2-2
≅
18...30V AC/DC
Pin
Assignment
1
OUT 2-2
2
OUT 1-2
3
OUT 1-1
4
GND
5
OUT 2-1
6
n.c.
7
Vcc
8
n.c.
13
measuring probe
optional bus output
Modbus RTU or M-Bus
+15V
optional
pressure sensor
signal output 1
analogue- or switching output
signal output 2
switching- or pulse output
Vcc
supply
GND
OUT x-1
OUT x-2
(AWG 17))
2
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