Leuze electronic
Connector Unit MA 30 / MA 31
17
Leuze
electronic
Connection
multiNet plus wiring
Figure 3.6: multiNet plus wiring
multiNet plus
connection hints
Hints for connecting the multiNet plus interface:
•
The wires RS 485 A, 485 B and GND are passed through the network.
For all connector units (MA xx) the corresponding terminals are pro-
vided double.
•
Connect the shielding to the slaves with PE.
•
The maximum wire length in the network is 1200m.
•
The (physically) last slave in the network should be fitted with a termi-
nating resistor of
220
Ω
between 485 A and 485 B. This prevents
reflections on the multiNet and improves the interference immunity.
•
Wires 485 A and 485 B must in no case be exchanged within the net-
work. The multiNet will otherwise not function.
485 A
485 B
GND
485 A
485 B
GND
485 A
485 B
GND
485
A
48
5 B
GN
D
RS 485
GN
D
GN
D
48
5
B
48
5
B
48
5
A
48
5
A
RS 485
RS 485
RS 485
GN
D
GN
D
GN
D
GN
D
GN
D
GN
D
48
5
B
48
5 B
485
B
48
5
B
48
5 B
485
B
48
5
A
48
5 A
485
A
48
5
A
48
5 A
485
A
Master
MA 30/31
multiNet plus
interface
MA 2
MA 21
MA 10
BCL 40
or
BCL 80
BCL 21
or
BCL 31
BCL 40
or
BCL 80
Terminal
resistance
220
Ω
BCL 90
MA 90
HS
or
RS 232
device
Connection with MA 30 only