Pilz PMCprimo DriveP.01/AA0/4/0/0/208-480VAC - Manual (Page 39)

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6-7
6.6 Interfaces
6 Wiring
Fig. 6-1: Overall length and length of the stub lines on a CAN net-
work.
Legend:
 Node: CANopen subscriber
 a: Length of stub line
 A: Branch
 R
T
: Terminating resistor
Relationship between transmission rate, bus length and length of stub
lines:
The following table provides an approximate overview of the size of the
terminating resistor R
T
with different cable lengths. In each specific
case, details of the characteristic impedance can be found in the cable
specification .
CANopen_Hinweis_Nutzerorganisation
Transmission
rate [kBit/s] Bus length l [m] Length of stub
line a [m] Overall length of
all stub lines [m]
1000 25 1,5 7,5
500 100 5,5 27,5
250 250 11 55
125 500 22 110
Bus length l [m] Terminating resistor R
T
[Ohm]
0 – 40 120
40 – 300 150 - 300
300 - 500 150 - 300
Node 1
Node 2 Node n-1
Node n
RT [ W ]
l
a Node 3
A A
RT [ W ]