13
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 flow meter a six-wire cable is needed (e.g. 6 x 1 mm
2
(AWG
17))
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)
Vcc
OUT 1-2
OUT 1-1
OUT 2-1
OUT 2-2
GND
18...30V AC/DC
+15V
mA_Input
+
-
Modbus data A (=D+) / M-Bus
Modbus data B (=D-) / M-Bus
≅
4...20mA
V
mA
p
I
measuring probe
signal output 1
analogue- or switching output
signal output 2
switching- or pulse output
supply
optional
pressure sensor
or
or
optional bus output
Modbus RTU or M-Bus
OUT x-1
OUT x-2
Connection plug for the
power supply and ana-
logue outputs
(rear view of
the terminals)
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.
