CRE Technology GENSYS 2.0 User Manual

A53 Z0 9 0020 L En Technical documentation
Chapter : Communication
156
Example of CAN connection between 3 modules (COM1)
terminal
terminal
terminal
120Ω
2
2
2
120Ω
7
7
7
3
3
3
5
5
5
Figure 76 - Example of CAN connection between 3 modules
CRE Technology provides a complete range of products aimed at installing your CAN bus
(complete cables, wires, connectors…). Please contact your local CRE Technology distributor to
help you choose adequate equipment to fit your needs.
15.1.2 Maximal length of a CAN bus
The maximal length of a CAN bus mostly depends on the communication speed, but also on the quality of
wires and connectors used. As said above, 120 Ω termination resistors should also be used appropriately.
Table below indicates the maximal length of a CAN bus depending on the communication speed.
Communication
speed (kbits/s)
Maximal length
(metres)
10
5000
20
2500
50
1000
125
500
250
250
500
100
800
50
Table 53 - Maximal length / communication speed
Next table lists the standard communication speed of each CAN protocol that can be used by your CRE
Technology module:
CAN bus
Protocol
Speed
(kbits/s)
Note
COM1
CRE Technology
protocol
125
Fixed
COM2
CANopen
125
[E1596] can be changed from 10 to 1000 kbps
(By CRE Config software or modification by
variable number)
MTU MDEC
125
Fixed
J1939 + CANopen
250
Fixed
Table 54 - Speed communication (COM1 & COM2)
WARNING:
Never plug or unplug the CAN bus connector when the unit is switch on. It could lead to
internal damages on CAN transmitter/receiver.

CRE Technology GENSYS 2.0 Specifications

General

Brand	CRE Technology
Model	GENSYS 2.0
Category	Control Unit
Language	English