4 wiring of the system bus (can), Wiring of the system bus (can), Electrical installation – Lenze EMZ9374IB User Manual
Page 56
Electrical installation
Wiring of the system bus (CAN)
l
56
EDBMZ9374X DE/EN/FR 4.2
6.4
Wiring of the system bus (CAN)
Principle structure
120 W
120 W
A
1
9374-Master
GND
LO
HI
PE
GND
LO
HI
PE
A
n
GND
LO
HI
PE
A
2
9374-Slave1
GND
LO
HI
PE
9374-Slave2
GND
LO
HI
PE
9374-Slave3
GND
LO
HI
PE
9374_005
A
1
Bus device 1 (controller)
A
2
Bus device 2 (9374 master)
A
n
Bus device n (n = max. 63)
9374 slave1 ... 9374 slave3 communicate with 9374 master (only bus device A
2
)
ƒ
Only terminals of the same type must be connected
ƒ
Connection of the bus terminating resistors:
–
One resistor 120
W on the first and last bus device .
Features:
ƒ
CAN−based with bus protocol according to CANopen (CAL−based
Communication Profile DS301)
ƒ
Bus expansion:
–
25 m for max. 1 Mbit/s baud rate
–
up to 1 km with reduced baud rate
ƒ
Extremely reliable data transmission (Hamming distance = 6)
ƒ
Signal level to ISO 11898
ƒ
Up to 63 bus devices are possible
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
Cable length
£ 300 m £ 70 m
W
/m
Cable length
£ 1000 m £ 40 m
W
/m
Signal propagation delay
£ 5 ns/m