Lenze EVF9338 - Manual (Page 98)

Electrical installation
Wiring of the system bus (CAN)
5
l
98 EDKVF9338 DE/EN/FR 4.0
5.6 Wiring of the system bus (CAN)
Wiring
A
1
A
2
A
3
A
n
93XX 93XX 93XX
GND GND GND GND LO LO LO LO HI HI HI HI X4 X4 X4 PE PE PE PE
120 120
9300VEC054
Fig. 5−14 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.
Specification of the transmission cable
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