2 Installation
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10
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2.3 Installing and wiring in compliance with EMC Directives
The basic wiring requirements are explained below.
How to ground
When grounding the controller and mains filter, use as thick a cable as possible and connect to the ground
point over the shortest possible distance so as not to generate potential difference at the grounded section. Use
a wide, thick and uniform conducting surface for the ground point.
Mains filter
Manufacturer Model
Schaffner EMC
FN2070-10-06
EPCOS AG
B84113-C-B110
Connect a mains filter in the AC input line to prevent the
noise generated in the controller from propagating externally
through the power supply line.
Oriental Motor recommends the mains filters shown in the
table right, based on our internal measurement results.
•
Install a mains filter at a point as close to the controller as possible.
•
Secure the input and output cables with cable clamps or the like so that they won’t rise from the surface of
the enclosure panel.
•
Do not wire the AC input-side cable (AWG16: 1.25 mm
2
) and the mains filter’s output cable (AWG16:
1.25 mm
2
) in parallel. If they are wired in parallel, noise occurring within the enclosure will be transmitted
to the power supply cable via stray capacitance, thereby reducing the mains filter’s effectiveness.
Surge arrester
Use a surge arrester or equivalent as below table.
Manufacturer
Single-phase 100-115 V
Single-phase 200-230 V
OKAYA ELECTRIC INDUSTRIES CO., LTD
R·A·V-781BWZ-4
R·C·M-601BQZ-4
PHOENIX CONTACT GmbH & Co. KG
PT2-PE/S120AC-ST
PT2-PE/S230AC-ST
Note
When measuring dielectric strength of the equipment, be sure to remove the surge
arrester, or the surge arrester may be damaged.
Wiring the I/O cable
Use a shielded cable with a wire of a size ranging between AWG24 to 22 (0.2 to 0.3 mm
2
) for the controller
I/O cable, and keep it as short as possible. (A shielded cable is available as an option.)
When grounding the I/O cable, use a metal cable clamp and ensure
that it contacts the shielded cable along the cable’s entire
circumference. Install the cable clamp at the end of the shielded
cable and secure it to an appropriate grounding point.
Shielded cable
Cable clamp
Notes about installation and wiring
•
When relays or electromagnetic switches are used together with the system, use mains filters and CR
circuits to suppress surges generated by them.
•
Wire the cables along the shortest possible distance, being sure not to wind or bundle excess lengths.
•
Separate the signal cables from the power cables such as the motor cable and power supply cable, and wire
them so that they’re separated by a distance approximately 100 to 200 mm (3.94 to 7.87 in.). If a power
cable and signal cable must cross, let them cross at a right angle. Additionally, keep a distance between the
mains filter’s AC input-side cable and output-side cable.
Precautionary note on static electricity
Static electricity may cause the controller to malfunction or sustain damage. Do not touch the controller while
power is being supplied. When adjusting the controller’s DIP switches while power is being supplied, be sure
to use an insulated screwdriver.
Summary of Contents for EZ limo ESMC-A2
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