4 WIRING
E-21
Special DeviceNet cables can be either thick cables or thin cables. The characteristics of
each type are given in the following table.
The maximum network length is determined by the type of cable, as shown in the following
table.
Using Thick Cable and Thin Cable Together
The line connecting two nodes located farthest from each other can use both thick and thin cables pro-
vided that the length of each cable satisfies the conditions in the following table.
Note:L
THICK
: Thick cable length L
THIN
: Thin cable length
Drop Line Length
The drop line length is the line length between a branch point on the trunk line to the farthest
node that is located on the drop line. The maximum drop line length is 6 m. A drop line can
be branched out into other drop lines.
Item
Cable Type
Thick Cable
Thin Cable
Signal decay
Slight
Considerable
Communications
distance
Long distance
Short distance
Characteristics
Rigid (difficult to bend)
Pliable (bends easily)
Baud rate (Kbps)
Maximum network length (m)
Thick cable
Thin cable
500
100
100
250
250
100
125
500
100
Baud Rate (Kbps)
Maximum Network Length (m)
500
L
THICK
+ L
THIN
≤
100
250
L
THICK
+ 2.5 x L
THIN
≤
250
125
L
THICK
+ 5.0 x L
THIN
≤
500
INFO
