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Appendix B - Adept DeviceNet
118 Adept SmartController User’s Guide, Rev. E
Figure B-1. Trunklines and Droplines Made of Thick and Thin Cable
DeviceNet allows devices to be powered directly from the bus, and devices can use the
same cable to communicate with other devices on the bus. DeviceNet nodes are
hot-plugable — you can remove or add components on the bus without powering down
the network.
NOTE: This hot-plugable feature is not fully supported. If you add a new
component to the network, you must make changes in the
CONFIG_C
program. Those changes are not active until you reboot the Adept
SmartController.
The power distribution on the network/bus does not need to be in one place. The
distribution of power supplies needs to be well planned since there are certain constraints
on the power supply. In general, power supplies can be placed at any point in the
network. The maximum current rating of a trunkline is 8 amps. DeviceNet allows
opto-isolated, externally powered devices (e.g., AC drive starters and solenoid valves) to
operate on the same bus cable. For detailed information see the DeviceNet Technical
Specifications or the Cutler Hammer DeviceNet Installation Planning Guide. This document
is available on the Internet at the following address:
http://cutlerhammer.eaton.com
from the menu item “DeviceNet Starter Kit”. The document is an Adobe Acrobat PDF file.
Adobe provides a free download of the Acrobat Reader program on their web site:
http://www.adobe.com
Node
Node
Node
Node
Node
Node
Node
Node
Node
Node
Node
Node
Multiple
Node
Branching
Drop Line
Multi-Port
Tap
Trunk Line
Terminating
Resistor
Multiple Node
Daisy Chain
Drop Line
Drop Line
Zero Length Drop Line
Terminating
Resistor
Short Drop Lines (6m/20ft)
Tap
Multi-Port
Ta p
Drop Line
Node Node