34
Network Configuration
Section 2-2
configured network will have recurring communications errors, such as
remote I/O communications errors and transmission timeouts.
Total Branch Line Length
The total branch line length is the sum of the lengths of all branch lines in the
network. The maximum total branch line length depends upon the baud rate,
as shown in the following table.
• Special Thin/Thick Cable
• Special Flat Cable
Maximum Network Length
The maximum network length is the distance between the two nodes that are
farthest apart or the distance between the terminators, whichever is greater.
(The trunk line length and max. network length are not always the same.)
The maximum network length depends upon the baud rate and cable type, as
shown in the following table.
• Special Thin/Thick Cable
• Special Flat Cable
Maximum Current Capacity
The maximum current capacity of a line depends on the cable type and the
function of the line (trunk or branch line). When planning the network configu-
ration, consider the type of cable being used, position of each device, and
each device’s current consumption.
Baud rate
Total branch line length
500 kbps
39 m max.
250 kbps
78 m max.
125 kbps
156 m max.
Baud rate
Total branch line length
500 kbps
35 m max.
250 kbps
48 m max.
125 kbps
135 m max.
Baud rate
Cable type
Total branch line length
500 kbps
Thick cable
100 m
Thin cable
250 kbps
Thick cable
250 m
Thin cable
100 m
125 kbps
Thick cable
500 m
Thin cable
100 m
Baud rate
Total branch line length
500 kbps
75 m max.
250 kbps
150 m max.
125 kbps
265 m max.
Summary of Contents for DEVICENET -
Page 1: ...DeviceNet Cat No W267 E1 11 OPERATION MANUAL...
Page 2: ...DeviceNet Operation Manual Revised April 2008...
Page 3: ...iv...
Page 5: ...vi...
Page 7: ...viii...
Page 9: ...x...
Page 13: ...xiv...
Page 41: ...20 Basic Operating Procedures Section 1 4...
Page 107: ...86 Operational Checklist Section 2 6...
Page 123: ...102 Step 3 Splitting the System into Multiple Power Supplies Section 3 6...
Page 161: ...140 Index...