Appendix B Cabling Requirements
© National Instruments Corporation B-3 NI-DNET User Manual
Power Supply Information for the DeviceNet Ports
The bus must supply power to each DeviceNet port. The bus power supply
should be a DC power supply with an output of 10V to 30 V. The
DeviceNet physical layer is powered from the bus using the V+ and V–
lines.
The power requirements for the DeviceNet port are shown in TableB-1.
You should take these requirements into account when determining the
requirements of the bus power supply for the system.
For the PCI-CAN, a jumper controls the source of power for the DeviceNet
physical layer. The location of this jumper is shown in FigureB-4.
Figure B-4. PCI-CAN Power Source Jumper
Table B-1. Power Requirements for the DeviceNet Physical Layer
for Bus-Powered Versions
Characteristic Specification
Voltage Requirement V+ 10 to 30 VDC
Current Requirement 40 mA typical
100 mA maximum
1 Power Supply Jumper J6
2 Product Name
3 Serial Number
4 Assembly Number
1 2
3
4