3 Installation
24
Up to 99 NT, PT and AT series units can be net-
worked via a CAN bus. The following table shows
the recommended cable cross-sections depending on
the bus length and the number of nodes:
Bus length / Number of nodes
32
64
100
100 m
0,25 mm
2
or AWG 24
0,25 mm
2
or AWG 24
0,25 mm
2
or AWG 24
250 m
0,34 mm
2
or AWG 22
0,5 mm
2
or AWG 20
0,5 mm
2
or AWG 20
500 m
0,75 mm
2
or AWG 18
0,75 mm
2
or AWG 18
1,0 mm
2
or AWG 16
In cases where the values specified in the table can-
not be adhered to, a CAN bridge for boosting the
signal must be installed, through which the length
of the CAN bus can be extended by up to 500 m.
The requirement to install a CAN bridge is therefore
determined by the bus length, the number of nodes
and the cable cross-sections.
CAN-Bus
Network length / number of nodes /
cable cross-section outside the table
values – 1 or several CAN bridge(s)
IN
V
ER
TE
R
IN
V
ER
TE
R
IN
V
ER
TE
R
C
A
N
-B
R
ID
G
E
The CAN bridge is available from Sunways. For
further information please contact the Technical
Hotline.
The CAN bridge subdivides the bus into two physi-
cally independent segments. The maximum cable
length of each segment is determined by the set bit
rate. With a bit rate of 125 kbit/s two segments with
a maximum length of 500 m each are possible. The
total line length can therefore be up to 1 km under
ideal conditions.