Cable Requirements For Can Type Option Boards - Danfoss VACON OPTE3 Installation Manual

VACON® RS485 and CAN Bus Option Boards
Installation Guide
For example, the following cables are recommended:
• Lapp Kabel UNITRONICR BUS LD FD P A, part number 2170813 or 2170814
• Belden 9841
The plug type to be used is 2.5 mm
The theoretical maximum cable length depends on baud rate. See the following table for suggested maximum cable lengths.
Table 4: The RS485 Cable Lengths
Baud rate (kbit/s)
9.6
19.2
93.75
187.5
500
1500
3000–12000

4.3 Cable Requirements for CAN Type Option Boards

The recommended cables for installation are four-wire twisted and shielded cables with an impedance of 120 Ω. The network topol-
ogy is a two-wire bus line that is terminated at both ends by resistors showing the characteristic impedance of the bus line.
The typical CAN bus cable impedance is 120 Ω, thus use termination resistance of ~120 Ω. For long networks, use a higher resistance
value (150–300 Ω). Minimum cable length of 1 meter between two stations is recommended.
Table 5: Bus Parameter Relation to Cable Length
Cable length (m) Maximum bit rate (kbit/s)
0–40 1000
100 500
250 250
500 100
1000 50
With CANopen and DeviceNet, use for example:
• UNITRONIC® BUS CAN FD P, Colour-coded in accordance with DIN 47100
Table 6: Cable Thickness, Length, and Baud Rate Relation
Bit rate
1 Mbit/s
500 kbit/s
250 kbit/s
125 kbit/s
Danfoss A/S © 2022.08
2
(AWG13).
Length of line A (m)
1200
1200
1200
1000
400
200
100
Maximum cable resistance (mΩ/m)
Maximum 70
< 60
< 50
< 40
< 26
Maximum cable thickness (mm
0.25 -
0.25 0.34
0.25 0.34
0.25 0.34
Length of line B (m)
1200
1200
1200
600
200
-
-
2
)
- -
- -
0.60 -
0.60 -
Bit rate supported by
CANopen
CANopen, DeviceNet
CANopen, DeviceNet
CANopen, DeviceNet
CANopen
Bit rate supported by
CANopen, DeviceNet
CANopen, DeviceNet
CANopen, DeviceNet
CANopen, DeviceNet
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Cabling