MD600 Series Compact AC Drive Hardware Guide-EN-B06.PDF - 第46页
Electrical Design ‑45‑ Figure 4‑9 Recommended wiring of the cabinet system Routing Precautions ● Main circuit cabling requirements The power supply input cable of the AC drive and motor cable can generate strong electrom…
Electrical Design
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Note
● The air volume of the selected fan cannot be smaller than the maximum air
volume Qmax. If a single fan cannot meet this requirement, multiple fans can be
used.
● Install the fan in the correct air exhaust direction to ensure that air flows from
inside to outside of the cabinet. Otherwise, hot air cannot be exhausted and the
drive may be overheated or damaged.
4.5.3 EMC-Compliant Cabinet Design
To prevent electromagnetic interference in the cabinet, isolate interference sources from
devices that may be interfered during installation. Divide a cabinet into multiple EMC
compartments or use multiple cabinets based on the intensity of interference sources,
and install each device in accordance with the following wiring principles.
Table 4–14 Wiring Principle
No.
Wiring Principle
1
Install the control devices and the drive devices in two different
cabinets.
2
If multiple cabinets are used, use grounding cables with a cross-
sectional area of at least 16 mm2 to connect different cabinets,
therefore realizing equipotential bonding between the cabinets.
3
Place the devices in different areas in the cabinet according to the
device signal strength.
4
Carry out equipotential bonding for the devices in different areas of
the cabinet.
5
Shield all communication (such as RS-485) signal cables leading from
the cabinet.
6
Install the power supply input filter close to the cabinet input
interface.
7
Spray each grounding point in the cabinet.
Electrical Design
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Figure 4‑9 Recommended wiring of the cabinet system
Routing Precautions
● Main circuit cabling requirements
The power supply input cable of the AC drive and motor cable can generate strong
electromagnetic interference. To avoid electromagnetic interference caused by long-
distance parallel coupling between the strong disturbing cable and control circuit,
ensure a distance longer than 20 cm between main circuit cables and signal cables
when cabling. Main circuit cables include the input R/S/T cable, output U/V/W cable,
DC bus, and braking cable. Signal cables include the I/O signal cable and
communication cable.
Cable ducts must be in good connection and well grounded. Aluminum cable ducts
can be used to ensure equipotentiality of the device. Connect the AC drive and motor
to the system (machines or devices) properly. Protect all connections with spray
coating and ensure good contact of conductive metal.
Electrical Design
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Figure 4‑10 Cabling diagram
● Requirements on cabling I/O signal cables
I/O signals include analog input (AI), analog output (AO), digital input (DI), digital
output (DO) and relay output signals. To avoid interference to the I/O signals,
separate the I/O signal cables at least 20 cm from the main circuit cables (R/S/T
cables and U/V/W cables) and other power cables or power supply cables.
Routing recommendations
● Routing of disturbing cables and sensitive cables
During routing, route cables that transmit different types of signals through different
routes. Separate the disturbing cables from sensitive cables by a distance of 20 cm
wherever possible. When two types of cables must be intersected, the intersection
angle must be 90 degrees to avoid interference, as shown in the following figure.
Figure 4‑11 Routing of disturbing cables and sensitive cables
● Routing of cables transmitting different types of signals
Route cables that transmit different types of signals through different routes and
separate them with equipotential signal cables. When routing cables that transmit the
same type of signals, the equipotential signal cable stays in the outer layer and
equipotential signals should stay in the middle if possible, as shown in the following
figure.