PAGE - 22 Manuale di installazione AM-8000
NOTIFIER ITALIA Doc. 160.1-AM8000-ITA Rev A.3 AM8000_manu-inst
CAN Bus wiring : CABLES
Communication Cable
Cable used for CAN Bus connection must be : Twisted pair – Shielded – Impedance: 120 Ohm
Shield wire have to be connected to the negative terminal on both side to guarantee the reference continuity.
Suggested cables are :
Double pair for both CAN-Bus + Power supply:
Belden 3082 A Multi-Conductor (18 AWG for CAN-Bus + 15 AWG for Power supply)
Using this cable, maximum distance from first to last equipment is: 800 mt at maximum transmission
speed of 31250 bit/sec
Belden 3086 A Multi-Conductor (20 AWG for CAN-Bus + 16 AWG for Power supply)
Using this cable, maximum distance from first to last equipment is: 400 mt at maximum transmission
speed of 31250 bit/sec
Single pair for CAN-Bus:
Belden 3105 A Twisted pair (22 AWG for Can-Bus only)
Using this cable, maximum distance from first to last equipment is: 300 mt at maximum transmission
speed of 31250 bit/sec
Power Supply Cable
Power supply cable can be a twisted pair with copper section proportional to :
o the distance from first and last equipment,
o Number and current consumption of all devices along the line.
o must guarantee the minimum voltage need to the properly functionality of all peripherals at
maximum current.
Can Bus Typology
Similary to all RS-485 communication line, the CAN Bus is a Point-to-Point sequential serie connection.
The wire must have a 120 Ohm resistor at each end.
The typology used is a Class A ( closed line – Loop ) .
It’s not necessary to follow the sequential serie on the peripherals addresses.
T-taps are not permitted.
Cable must be wired in conduits separated by the mains power line and anyway wiring must be compliant to laws
and rules valid in the country of the installation.
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