Electrical installation
Wiring of the system bus (CAN)
5
211
EDKVF9333V DE/EN/FR 7.2
5.9 Wiring of the system bus (CAN)
Installation material required from the scope of supply:
Description Use Quantity
Terminal strip, 3−pole Connection of system bus (CAN) at X4 1
Wiring
A
1
A
2
A
3
A
n
93XX 93XX 93XX
GND GND GND GNDLO LO LO LOHI HI HI HIX4 X4 X4PE PE PE PE
120 120
9300VEC054
Fig. 5−30 System bus (CAN) wiring
A
1
Bus device 1 (controller)
A
2
Bus device 2 (controller)
A
3
Bus device 3 (controller)
A
n
Bus device n (e. g. PLC), n = max. 63
X4/GND CAN−GND: System bus reference potential
X4/LO CAN−LOW: System bus LOW (data line)
X4/HI CAN−HIGH: System bus HIGH (data line)
Stop!
Connect a 120 W terminating resistor to the first and last bus device.
We recommend the use of CAN cables in accordance with ISO 11898−2:
CAN cable in accordance with ISO 11898−2
Cable type Paired with shielding
Impedance 120 W (95 ... 140 W)
Cable resistance/cross−section
Cable length £ 300 m £ 70 mW/m / 0.25 0.34 mm
2
(AWG22)
Cable length 301 1000 m £ 40 mW/m / 0.5 mm
2
(AWG20)
Signal propagation delay £ 5 ns/m
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