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Chapter 4
WIRING AND CABLING
• Before starting installation and wiring, turn OFF the power and wait at least five minutes for inverters with
a capacity of 22 kW or below, or at least ten minutes for inverters with a capacity of 30 kW or above.
Make sure that the LED monitor and charging lamp are turned OFF. Further, make sure, using a
multimeter or a similar instrument, that the DC link bus voltage between the terminals P(+) and N(-) has
dropped to the safe level (+25 VDC or below).
• Qualified electricians should carry out wiring.
Otherwise, an electric shock could occur.
• In general, the covers of the control signal wires are not specifically designed to withstand a high voltage
(i.e., reinforced insulation is not applied). Therefore, if a control signal wire comes into direct contact with
a live conductor of the main circuit, the insulation of the cover might break down, which would expose the
signal wire to a high voltage of the main circuit. Make sure that the control signal wires will not come into
contact with live conductors of the main circuit.
Failure to observe this precaution could cause an electric shock or an accident.
Noise may be emitted from the inverter, motor and wires. Take appropriate measures to prevent the nearby
sensors and devices from malfunctioning due to such noise.
An accident could occur.
4.1 Basic Connection Diagram
FRENIC-MEGA
L1/R
L2/S
L3/T
OPC-G1-DEV
DeviceNet
terminal block
CAN L
Shield
CAN H
* Mounting the communications card connects to the grounding zG.
Figure 4.1 Basic Connection Diagram
11
U
Motor
V
M
W
DeviceNet cable
V-
V+
z
G *
G
To
DeviceNet
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