Termination Resistors
The termination resistors (Rt) should match the nominal
impedance of the CAN cable and therefore comply with the
values in the following table.
Table 4.
Termination Resistor Specification
Characteristic
Value
Condition
Termination resistor, R
t
100 Ω min,
Minimum power dissipation:
220 mW
120 Ω nominal,
130 Ω max
Cable Lengths
The cabling characteristics and desired bit transmission rates
affect the allowable cable length. You can find detailed cable
length recommendations in the ISO 11898, CiA DS 102, and
DeviceNet specifications.
ISO 11898 specifies 40 m total cable length with a maximum
stub length of 0.3 m for a bit rate of 1 Mb/s. The ISO 11898
NI 9853 Getting Started Guide
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© National Instruments
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