Bus Termination Resistor; Max. Cable Lengths - Eaton PowerXL DX-NET-DEVICENET Manual

3 Installation
3.6 Installing the fieldbus connection

3.6.2 Bus termination resistor

3.6.3 Max. cable lengths

22
The first and last modules on a DeviceNet network must be terminated with
a 120 Ω bus termination resistor. This resistor needs to be connected
between CAN_H and CAN_L.
. . .
0 1
R
T
Figure 12:Bus termination resistors RT: CAN_H and CAN_L terminals
The maximum bus cable length depends not only on the data rate, but also
on the type of cable being used. The following cable types are permitted:
• A so-called "Thick Cable",
• a so-called "Thin Cable",
• a so-called "Flat Cable",
Table 5: Maximum length for specific DeviceNet cables
Baud rate Maximum cable length [m]
[Kbit/s] "Thick Cable"
125 500
250 250
500 100
DX-NET-DEVICENET 02/14 MN04012005ZEN www.eaton.com
n
R
T
"Thin Cable" "Flat Cable"
100 420
100 200
100 100