Manufacturer And Local Representative; Measures For Emc; 13.4.1 Basic Measures For Emc; 13.4.2 Control Box Design And Emc Tests - Mitsubishi LE-30CTN Instruction Manual

13. EC Directives (CE Marking)
13.3

Manufacturer and local representative

• Manufactured at: Mitsubishi Electric Corporation Himeji Works
• Authorized Representative in the European Community: Mitsubishi Electric Europe B.V.
13.4

Measures for EMC

13.4.1 Basic measures for EMC

• Perform the following methods securely to achieve the electromagnetic compatibility.
(1) Install the equipment inside a closed metallic control box (so that radiated noise is sealed).
(2) Install a noise filter (so that conduced noise is reduced).
(3) Perform grounding securely (so that the equipment cannot work as a noise antenna).
(4) Shield power cables and control cables (so that radiated noise is sealed).
(5) Assure sufficient distance between a noise source and counterpart equipment, or install a noise
source individually inside a control box (so that radiated noise is sealed).
(6) Insulate circuits (so that noise is not conducted).

13.4.2 Control box design and EMC tests

The LE-30CTN is so designed as to be incorporated in other equipment. Make sure to install it inside a control
box (to assure safety, restrain noise radiation and shield noise).
The control box design, internal equipment layout and wiring layout are extremely important to achieve the
electromagnetic compatibility. Design the control box under sufficient consideration of the following items.
Make sure to perform EMC tests using the entire machine or system.
(1) The control box should be made of metal.
(2) We recommend using a control box having the electromagnetic compatibility.
(3) If the control box does not have the electromagnetic compatibility, completely remove the coating
inside the control box main body and on the rear side of the control box cover when performing
grounding using a grounding strap or shielding mesh.
(4) The control box door should get secure grounding to the control box main body.
If the control box door is poorly grounded, the door itself will work as a large antenna and emit noise.
Take the following action.
[1] Make sure that the door is made of metal.
[2] Connect the door to the control box main body with braided wires at as many points as possi-
[3] Use EMI gasket and conductive packing in areas where the door is in contact with the control
(5) Make sure that the inside of the control box is free from metals and conductors whose electrical
connection is insufficient.
(6) Complete grounding of the control box is highly effective to achieve the electromagnetic
compatibility.
54
840 Chiyoda-machi, Himeji, Hyogo 670-8677 Japan
Gothaer Str. 8, 40880 Ratingen, Germany.
EMI gasket
Packing
Door
ble.
box main body.
13.3 Manufacturer and local representative
Control box
Metallic box
Apply conductive treatment on
areas in contact with EMI gasket.