Electrical wiring
VA 520 Bi directional English V1.21
Page 14 of 45
9
Electrical wiring
9.1
Modbus RTU, 4…20mA, Pulse or MBus
Attention:
Not required connections NC must not be connected to a voltage and/or to protection
earth. Cut and insulate cables.
Pin 1
Pin 2
Pin 3
Pin 4
Pin 5
Connector plug
A
+VB
RS 485 (A)
RS 485 (+)
-VB
RS 485 (B)
RS 485 (-)
I+
(Ch1)
4..20 mA
Connector plug
B
Pulse output (standard)
I+
(Ch2)
4..20 mA
Pulse
(Ch2)
galv. isolated
Pulse
(Ch2)
gavl. isolated
Pulse
(Ch1)
galv. isolated
Pulse
(Ch1)
gavl. isolated
Connector plug
B
Option MBus
NC
GND
DIR
MBus
MBus
Colours pulse cables
0553 0106 (5 m)
0553.0107 (10 m)
brown
white
blue
black
grey
Legend:
-VB
Negative supply voltage 0 V
Pulse
Pulse for consumption
+VB
Positive supply voltage 18...36 VDC smoothed
NC
Must not be connected to a voltage
and/or to protection earth. Please cut
and isolate cables.
I +
Current signal 4...20 mA
– selected measured
signal
RS 485 (A)
RS 485 (B)
Modbus RTU A / Modbus RTU (+)
Modbus RTU B / Modbus RTU (-)
MBus
MBus (reverse polarity protected)
If no connection cable/ pulse
cable is ordered the sensor will
be supplied with a M12
connector plug. The user can
connect the supply and signal
cables as indicated in the
connection diagram.
.
M12 Connector plug
View from back side
(terminal side)
- Connector plug A
- Connector plug B
