4 electrical installation, 1 can bus wiring, Electrical installation – Lenze 931M-931W User Manual
Page 13: 4electrical installation, Stop, Can bus wiring

Electrical installation
CAN bus wiring
4
13
KHB 13.0003-EN
2.0
4
Electrical installation
4.1
CAN bus wiring
CAN_L
CAN_L
CAN_L
CAN_L
CAN_GND
CAN_GND
CAN_GND
CAN_GND
CAN_SHLD
CAN_SHLD
CAN_SHLD
CAN_SHLD
CAN_H
CAN_H
CAN_H
CAN_H
X4.1
X4.2
A
2
A
1
A
n
CAN-GND
CAN_SHLD
CAN_L
CAN_H
120
1 2
3
4 5
6
7 8
9
120
W
120
W
931m_050
Fig. 1
Basic wiring of CANopen with Sub-D connector to the master
A
1
Node 1 - master (e.g. PLC)
A
2
Node 2 - slave (e.g. 931M/W controller)
A
n
Node n - slave, n = max. 128
Stop!
Connect a 120 Ω terminating resistor to the first and last bus device.
If the last bus device is a 931M/W controller, use the »fluxx« software to activate the
terminating resistor.
Specification of the transmission cable
Please observe our recommendations for signal cables.
Bus cable specification
Cable resistance
135 - 165 Ω/km, (f = 3 - 20 MHz)
Capacitance per unit length
≤
30 nF/km
Loop resistance
< 110 Ω/km
Wire diameter
> 0.64 mm
Wire cross-section
> 0.34 mm
2
Wires
double twisted, insulated and shielded
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