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Wiring
Fig.: Overall length and length of the stub lines on a CAN network.
Legend:
}
Node: CANopen subscriber
}
a: Length of stub line
}
A: Branch
}
R
: Terminating resistor
T
Relationship between transmission rate, bus length and length of stub lines:
Transmission rate
[kBit/s]
1000
500
250
The following table provides an approximate overview of the size of the terminating resistor
R
with different cable lengths. In each specific case, details of the characteristic imped-
T
ance can be found in the cable specification.
Bus length l [m]
0 - 40
40 - 300
300 - 500
Operating Manual PMCprimo C2
1004683-EN-02
Node 2
Node 1
A
R T [
W
]
Bus length l [m]
10
70
115
INFORMATION
Please also refer to the installation guidelines published by the CANopen
User Group.
Node n-1
a
Node 3
A
l
Length of stub line
a [m]
1.5
5.5
11
Terminating resistor R
120
150 - 300
150 - 300
Node n
R T [
W
]
Overall length of all
stub lines [m]
7.5
27.5
55
[Ohm]
T
| 37
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