adept technology SmartController EX User Manual page 89

Network Size
Bus Topology
Bus Addressing
System Features
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
Thick Trunk Length
Thin Trunk Length
Maximum Drop Length
Cumulative Drop Length
Adept SmartController EX User's Guide, Rev.C
Chapter 7: Adept DeviceNet
A maximum of 64 nodes [0...63]
Linear (trunk line/drop line); power and signal on the same net-
work cable
Multi-Master and Master/Slave special case; polled
Removal and replacement of devices from the network under
power not supported by Adept
125 Kbps
500 m
(1,640 ft)
100 m
(328 ft)
6 m
(20 ft)
156 m
(512 ft)
Figure 7-2. DeviceNet Thick Cable
Page 89 of 96
250 Kbps 500 Kbps
250 m 100 m
(820 ft) (328 ft)
100 m 100 m
(328 ft) (328 ft)
6 m 6 m
(20 ft) (20 ft)
78 m 39 m
(256 ft) (128 ft)