B&R Automation PC 3100 User Manual page 98

Technical data
6
7
8
9
1) The interfaces, etc. available on the device or module have been numbered for the purpose of clear differentiation. This numbering may deviate from the
numbering used by the respective operating system, however.
CAN - Bus length and cable type
The type of cable to be used depends largely on the required bus length and number of nodes. The bus length is
determined by the transfer rate. According to CAN in Automation (CiA), the maximum bus length is 1000 meters.
The following bus lengths are permitted at a maximum permissible oscillator tolerance of 0.121%:
Extension
≤1000 m
≤200 m
≤100 m
≤20 m
Preferably, the cable material used should have the following properties or deviate only slightly from them in order
to achieve an optimal transfer rate.
CAN cable
Signal line
Cable cross section
Wire insulation
Conductor resistance
Stranding
Shield
Ground conductor
Cable cross section
Wire insulation
Conductor resistance
Outer jacket
Material
Properties
Cable shield
I/O address and IRQ
Resource
I/O address
IRQ
CAN driver settings
The baud rate can be set either with predefined values or the bit timing register. For additional information, see
the technical description of the B&R CAN driver.
Bit timing register 1
00h
80h or 00h
81h or 01h
83h or 03h
84h or 04h
89h or 09h
98
CAN bus
Reserved
CAN HIGH
n.c.
n.c.
Table 118: 5AC901.ICAN-01 - Pinout
Table 119: CAN - Bus length and transfer rate
2x 0.25 mm² (24AWG/19), tinned copper stranded wire
1x 0.34 mm² (22AWG/19), tinned copper stranded wire
Table 120: CAN cable requirements
Default setting
384h (address register)
385h (data register)
IRQ10
Table 121: I/O address and IRQ
Bit timing register 0
14h
1Ch
1Ch
1Ch
1Ch
1Ch
Table 122: CAN driver settings
Automation PC 3100 User's manual V 1.00 Translation of the original documentation
1)
Transfer rate
Typ. 50 kbit/s
Typ. 250 kbit/s
Typ. 500 kbit/s
Typ. 1 Mbit/s
Property
PE
≤82 Ω/km
Wires stranded in pairs
Pair shielding with aluminum foil
PE
≤59 Ω/km
PUR compound
Halogen-free
Composed of tinned copper wires
Function
Defines the register number to be accessed.
Access to the register defined in the address register.
Interrupt
Baud rate
1000 kbit/s
500 kbit/s
250 kbit/s
125 kbit/s
100 kbit/s
50 kbit/s