Technical data • Individual components
68
Automation PC 3100 user's manual V0.60
3.5.3.3.1 Pinout
CAN bus
Type
Electrically isolated
Transfer rate
Max. 1 Mbit/s
Bus length
Max. 1000 meters
Pin
Assignment
1
n.c.
2
CAN LOW
3
GND
4
n.c.
5
n.c.
6
Reserved
7
CAN HIGH
8
n.c.
9
n.c.
DSUB, 9-pin, male
5
1
9
6
Table 77: 5AC901.ICAN-01 - Pinout
3.5.3.3.2 I/O address and IRQ
Resource
Default setting
Function
384h (address register)
Defines the register number that should be accessed.
I/O address
385h (data register)
Access to the register defined in the address register.
IRQ
IRQ10
Interrupt
Table 78: I/O address and IRQ
1)
Resource allocation is identical for the interface option 1 and 2 slots.
3.5.3.3.3 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 bit rate. In accordance with CiA (CAN in Automation), the maximum bus length is 1000 meters.
The following bus lengths are permitted with a maximum 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 79: CAN - Bus length and transfer rate
The material used for the cable should have all of the following properties or deviate from them as little as possible
to achieve an optimal transfer rate.
CAN cable
Property
Signal lines
Cable cross section
Wire insulation
Conductor resistance
Stranding
Shield
2x 0.25 mm² (24 AWG / 19), tinned copper stranded wire
PE
≤82 Ω/km
Wires stranded in pairs
Paired shield with aluminum foil
Ground line
Cable cross section
Wire insulation
Conductor resistance
1x 0.34 mm² (22 AWG / 19), tinned copper stranded wire
PE
≤59 Ω/km
Outer jacket
Material
Properties
Complete shielding
PUR compound
Halogen-free
Composed of tinned copper wires
Table 80: CAN cable requirements
