Vacon NXP series - Page 78

3
vacon • 76 Descriptions of VACON® option boards
Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/
Alternative connection of “CAN GND” signal: connect ‘CAN GND’ together between all nodes. Use
the signal wire inside the shield for this purpose, see figure below:
Figure 28. Alternative connection of ”CAN GND” signal
Connections between AC drives with OPTD2
Special connection:
In this connection example, the leftmost device is the Master and the others are slaves. The Master
can send and receive data from the slaves. The slaves cannot communicate with each other.
Changing of masters is not possible, the first device is always the Master.
The OPTD2 board in the Master has the default jumper selections, i.e. X5:1-2. The jumper positions
have to be changed for the slaves: X5:2-3.
Table 42.
Max.
number of devices
in line
Max.
speed achieved
[Mbit/s]
312
66
12 3
24 1.5
Shield
CAN HI CAN HI
CAN LO CAN LO
CAN
GND
CAN
GND
21 22 23
OPTD2 /
OPTD6
OPTD2 /
OPTD6
OPTD2 /
OPTD6
Grounding clamp
Connect the
data GND
tightly to the
chassis on
one point
in the net
21 22 23
21 22 23
7290.emf