B&R Industries Automation PC 620, User Manual

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Technical data • Individual components
Automation PC 620 User's Manual V 1.90
The following bus lengths are permitted with a maximum oscillator tolerance of 0.121 %:
The material used for the cable should preferably have all or most of the following properties in
order to reach an optimal transfer rate.
Terminating resistance
CAN networks are cabled using a bus structure where both ends of the bus are equipped with
terminating resistors. The add-on CAN interface has an integrated terminating resistor (delivery
state: disabled with the setting "Off").
Distance [m] Transfer rate [kBit/s]
≤
1000 Type 50
≤
200 Type 250
≤
60 Type 500
Table 74: CAN bus length and transfer rate
CAN cable Property
Signal lines
Cable cross section
Wire insulation
Conductor resistance
Stranding
Shield 2 x 0.25 mm² (24AWG/19), tinned Cu wire
PU
≤
82 Ohm / km
Wires stranded in pairs
Paired shield with aluminum foil
Grounding line
Cable cross section
Wire insulation
Conductor resistance 1 x 0.34 mm² (22AWG/19), tinned Cu wire
PU
≤
59 Ohm / km
Outer sheathing
Material
Properties
Entire shielding PUR mixture
Halogen free
From tinned cu wires
Table 75: CAN cable requirements
Figure 66: Terminating resistor for add-on CAN interface 5AC600.CANI-00
ON
OFF