Lenze 931M-931W - Manual (Page 13)

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