B&R Panel PC 3100, User Manual, Page: 98 / 277

Technical data
98 Automation PC 3100 User's manual V 1.00
Translation of the original documentation
CAN bus
1)
6 Reserved
7 CAN HIGH
8 n.c.
9 n.c.
Table 118: 5AC901.ICAN-01 - Pinout
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 Transfer rate
≤1000 m Typ. 50 kbit/s
≤200 m Typ. 250 kbit/s
≤100 m Typ. 500 kbit/s
≤20 m Typ. 1 Mbit/s
Table 119: CAN - Bus length and transfer rate
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 Property
Signal line
Cable cross section
Wire insulation
Conductor resistance
Stranding
Shield
2x 0.25 mm² (24AWG/19), tinned copper stranded wire
PE
≤82 Ω/km
Wires stranded in pairs
Pair shielding with aluminum foil
Ground conductor
Cable cross section
Wire insulation
Conductor resistance
1x 0.34 mm² (22AWG/19), tinned copper stranded wire
PE
≤59 Ω/km
Outer jacket
Material
Properties
Cable shield
PUR compound
Halogen-free
Composed of tinned copper wires
Table 120: CAN cable requirements
I/O address and IRQ
Resource Default setting Function
384h (address register) Defines the register number to be accessed. I/O address
385h (data register) Access to the register defined in the address register.
IRQ IRQ10 Interrupt
Table 121: I/O address and 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 Bit timing register 0 Baud rate
00h 14h 1000 kbit/s
80h or 00h 1Ch 500 kbit/s
81h or 01h 1Ch 250 kbit/s
83h or 03h 1Ch 125 kbit/s
84h or 04h 1Ch 100 kbit/s
89h or 09h 1Ch 50 kbit/s
Table 122: CAN driver settings
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