schmersal bp408, Руководство по установке

Страница: 67 / 122

Installation manual of system “bp408” - Electrical connection 67
Furthermore, the baud rate of all connected nodes must be equal. As network
master, bp408 provides a baud rate of 250 kBit to the interfaces CAN1 and CAN2.
All other components of Böhnke + Partner GmbH have an automatic baud rate
detection or are preset at 250 kBit. For the baud rate used, the bus must not exceed
a length of maximum 200 m. The transmission lines in total must not be longer
than 3 m.
7.7.2 Cable colours
The cable colours for bus lines are not defined in CANopen Lift. To facilitate wiring
and fault-finding, we recommend using the following colours for the bus lines:
Signal Description Colour
CAN_L CAN-Bus-Signal (dominant low) blue
CAN_H CAN-Bus-Signal (dominant high) white
GND External ground black
CAN_V+ External voltage supply (+24 V) red
7.7.3 Network topology
Bus systems dictate a topology based
on the laws of physics. For the CAN-Bus
used, a line structure is dictated in the
specification CiA 417.
This cable routing is not always feasible
in practise. Therefore, additional lines
can be connected via repeaters. Note
that each section behind a repeater is an
independent bus and must therefore be
terminated at the beginning and at the
end.
Figure 45:
Lines can be connected using repeaters:
Figure 46:
The wiring of all nodes must always form a line.