Adept EX SmartContoller - Manual (Page 88)

Chapter 7: Adept DeviceNet
Figure 7-1. Trunk Lines and Drop Lines 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-pluggable —
you can remove or add components on the bus without powering down the network.
NOTE: This hot-pluggable feature is not fully supported. If you add a new component to the net-
work, you must make changes in the Adept ACE Configuration Tools. Those changes are not
active until you reboot the Adept SmartController EX motion controller.
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 because 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 trunk line 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.
Table 7-2. Features of a DeviceNet Network
Network Size A maximum of 64 nodes [0...63]
Network Length Selectable, end-to-end network distance varies with speed
Baud Rate Distance (thick cable)
125 Kbps 500 m (1,640 ft)
250 Kbps 250 m (820 ft)
500 Kbps 100 m (328 ft)
Data Packets 0-8 bytes
Adept SmartController EX User’s Guide, Rev. B
Page 88 of 96