Installation / Preparation for start-up
TR-Electronic GmbH 2016, All Rights Reserved
Printed in the Federal Republic of Germany
Page 100 of 127
TR - ECE - BA - DGB - 0128 - 01
11/20/2018
4 Installation / Preparation for start-up
The CANopen system is wired in bus topology with terminating resistors (120 ohms) at
the beginning and at the end of the bus line. If it is possible, drop lines should be
avoided. The cable is to be implemented as shielded twisted pair cable and should
have an impedance of 120 ohms and a resistance of 70 m
/m. The data transmission
is carried out about the signals CAN_H and CAN_L with a common GND as data
reference potential. Optionally also a 24 V supply voltage can be carried.
In a CANopen network max. 127 slaves can be connected. The measuring system
supports the Node-ID range from 1-127 and the Baud rates:
●
10 kbit/s
●
20 kbit/s
●
50 kbit/s
●
125 kbit/s
●
250 kbit/s
●
500 kbit/s
●
800 kbit/s
●
1 Mbit/s
The length of a CANopen network is depending on the transmission rate and is represented in the
following:
Cable cross section
10 kbit/s
20 kbit/s
50 kbit/s
125 kbit/s
250 kbit/s
500 kbit/s
800 kbit/s
1 Mbit/s
0.25 mm
2
– 0.34 mm
2
5000 m
2500 m
1000 m
500 m
250 m
100 m
50 m
25 m
The
-
ISO 11898,
-
the recommendations of the CiA DR 303-1
(CANopen cabling and connector pin assignment)
-
and other applicable standards and guidelines are to be observed to insure
safe and stable operation!
In particular, the applicable EMC directive and the shielding and grounding guidelines
must be observed!