Adept EX SmartContoller - Manual (Page 89)

Chapter 7: Adept DeviceNet
Network Size A maximum of 64 nodes [0...63]
Bus Topology Linear (trunk line/drop line); power and signal on the same net-
work cable
Bus Addressing Multi-Master and Master/Slave special case; polled
System Features Removal and replacement of devices from the network under
power not supported by Adept
The baud rate of the system depends on the length of the network (end-to-end) and the type of
cable. The following table shows how cable selection and trunk line length affect the max-
imum data rate on the network. The figure DeviceNet Thick Cable on page 89 shows a thick
cable, and the figure DeviceNet Thin Cable on page 90 shows a thin cable.
Table 7-3. DeviceNet Data Rates Relative to Cable Type and Length
Data Rates 125 Kbps 250 Kbps 500 Kbps
Thick Trunk Length 500 m
(1,640 ft) 250 m
(820 ft) 100 m
(328 ft)
Thin Trunk Length 100 m
(328 ft) 100 m
(328 ft) 100 m
(328 ft)
Maximum Drop Length 6 m
(20 ft) 6 m
(20 ft) 6 m
(20 ft)
Cumulative Drop Length 156 m
(512 ft) 78 m
(256 ft) 39 m
(128 ft)
Figure 7-2. DeviceNet Thick Cable
Adept SmartController EX User’s Guide, Rev. B
Page 89 of 96