National Instruments NI 9853 - Manual (Page 12)

NI 9853 Operating Instructions 12 ni.com
Cabling Requirements for NI 9853
This section deals with cabling specifications, termination
resistors, cable lengths, and the number of CAN nodes that can
exist in a system.
Cable Specifications
Cables should meet the physical medium requirements specified in
ISO 11898, shown in Table 3. Belden cable (3084A) meets all of
those requirements, and should be suitable for most applications.
Table 3. ISO 11898 Specifications for Characteristics of a CAN_H and
CAN_L Pair of Wires
Characteristic Value
Impedance 95
Ω minimum, 120 Ω nominal, 140 Ω maximum
Length-related
resistance 70 m Ω/m nominal
Specific line delay 5 ns/m nominal