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Appendix B
Cabling Requirements
© National Instruments Corporation
B-3
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 10 V to 30 V. The
DeviceNet physical layer is powered from the bus using the V+ and V–
lines.
should be a DC power supply with an output of 10 V 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 Table B-1.
You should take these requirements into account when determining the
requirements of the bus power supply for the system.
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 Figure B-4.
physical layer. The location of this jumper is shown in Figure B-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
100 mA maximum
1
Power Supply Jumper J6
2
Product Name
3
Serial Number
4
Assembly Number
1
2
3
4