Omron SYSDRIVE MX2 SERIES User Manual page 435

Appendix-4 Notes on Compliance with EC Directives and UL/cUL Standards
Input class
3-phase 400 V
class
* 3G3MX2-A2110 and A4150 needs to be installed in a metal cabinet and add ferrite core at the input
cable to meet category C1. Unless otherwise category C2.
Important notes
1. Input choke or other equipment is required if necessary to comply with EMC directive from
the harmonic distortion point of view (IEC 61000-3-2 and 4).
2. If the motor cable length exceeds 20m, use output choke to avoid unexpected problem due
to the leakage current from the motor cable (such as malfunction of the thermal relay,
vibration of the motor, etc.).
3. As user you must ensure that the HF (high frequency) impedance between adjustable
frequency inverter, filter, and ground is as small as possible.
Ensure that the connections are metallic and have the largest possible contact areas
(zinc-plated mounting plates).
4. Avoid conductor loops that act like antennas, especially loops that encompass large areas.
Avoid unnecessary conductor loops.
Avoid parallel arrangement of low-level signal wiring and power-carrying or noise-prone
conductors.
5. Use shielded wiring for the motor cable and all analog and digital control lines.
Allow the effective shield area of these lines to remain as large as possible; i.e., do not strip
away the shield (screen) further away from the cable end than absolutely necessary.
With integrated systems (for example, when the adjustable frequency inverter is
communicating with some type of supervisory controller or host computer in the same control
cabinet and they are connected at the same ground + PE-potential), connect the shields of the
control lines to ground + PE (protective earth) at both ends. With distributed systems (for
example the communicating supervisory controller or host computer is not in the same control
cabinet and there is a distance between the systems), we recommend connecting the shield
of the control lines only at the end connecting to the adjustable frequency inverter. If possible,
route the other end of the control lines directly to the cable entry section of the supervisory
controller or host computer. The shield conductor of the motor cables always must connected
to ground + PE at both ends.
To achieve a large area contact between shield and ground + PE-potential, use a PG screw
with a metallic shell, or use a metallic mounting clip.
Use only cable with braided, tinned copper mesh shield (type "CY") with 85% coverage.
The shielding continuity should not be broken at any point in the cable. If the use of reactors,
contactors, terminals, or safety switches in the motor output is necessary, the unshielded
section should be kept as short as possible.
Some motors have a rubber gasket between terminal box and motor housing. Very often, the
terminal boxes, and particularly the threads for the metal PG screw connections, are painted.
Make sure there is always a good metallic connection between the shielding of the motor
cable, the metal PG screw connection, the terminal box, and the motor housing. If necessary,
carefully remove paint between conducting surfaces.
SYSDRIVE MX2 Series USER'S MANUAL (3G3MX2-Axxxx)
Inverter model Filter model (Schaffner)
3G3MX2-A4004
FS24830-6-07
3G3MX2-A4007
3G3MX2-A4015
3G3MX2-A4022 FS24830-12-07
3G3MX2-A4030
3G3MX2-A4040 FS24830-15-07
3G3MX2-A4055
FS24830-29-07
3G3MX2-A4075
3G3MX2-A4110
FS24830-48-07
3G3MX2-A4150
A
Appendix-10