CHAPTER 35
Network connection
405.1200.037.2 - Rel.: 2.21 of 25/02/2008
35-26
Example:
Suppose each devices possess 2 SDOs and 3 PDOs. If all are activated, the
maximum number of the devices that can be connected is 21, i.e. the overall
number of channels admissible divided by the number of PDO channels for
each device (because the PDO channels, being more numerous, determine
the limit).
As can be seen from the figure above, the connections for the devices at the
ends of the line (A) are different from the internal ones (B). Indeed, the A
connectors require cabling with a termination resistance for the line.
The VT terminals are already internally equipped with a termination resis-
tance, so in the first case (VT master) the resistance on the connector can be
omitted by using an integrated resistance. (See chapter on terminal to be
connected).
VTxxxH terminal cables always have terminations.
There follow diagrams of the types of connection.
Max. participants =
Channels activated
Max. of channels allowed
3
64
=
CAN -
2
3
Shield
4
CAN +
V -
1
3
Shield
V -
1
4
CAN +
CAN -
2
120 Ω
1/4 W
Connector type B
5 pin male
Connector type A
5 pin male
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