8 EMC AND LOW VOLTAGE DIRECTIVE

MELSEC-Q

8 EMC AND LOW VOLTAGE DIRECTIVE

For the products sold in European countries, the conformance to the EMC Directive, which is one of the European Directive, has been a legal obligation since 1996. Also, conformance to the Low Voltage Directive, another European Directive, has been a legal obligation since 1997.

Manufacturers who recognize their products must conform to the EMC and Low Voltage Directive required to declare that their products conform to these Directives and put a "CE mark" on their products.

8.1 Requirements for Conformance to EMC Directive

The EMC Directive specifies that products placed on the market must "be so constructed that they do not cause excessive electromagnetic interference (emissions) and are not unduly affected by electromagnetic interference (immunity)".

The applicable products are requested to meet these requirements. The sections 8.1.1 through 8.1.6 summarize the precautions on conformance to the EMC Directive of the machinery constructed using the MELSEC-Q series PLCs.

The details of these precautions has been prepared based on the control requirements and the applicable standards control. However, we will not assure that the overall machinery manufactured according to these details conforms to the above-mentioned directives. The method of conformance to the EMC Directive and the judgment on whether or not the machinery conforms to the EMC Directive must be determined finally by the manufacturer of the machinery.

8.1.1 Standards applicable to the EMC Directive

The standards applicable to the EMC Directive are listed below.

Specification

 

Test item

Test details

Standard value

 

 

 

 

 

 

30 M-230 MHz QP

: 30 dB

V/m

 

 

 

EN55011

 

Electromagnetic emissions from the

(30 m in measurement range)

1

 

 

EN50081-2 :

Radiated noise 2

product are measured.

230 M-1000 MHz QP

: 37 dB

V/m

 

 

 

 

 

(30 m in measurement range)

 

 

8

1995

 

 

 

 

 

EN55011

 

Electromagnetic emissions from the

150 k-500 kHz QP

: 79 dB, Mean : 66 dB 1

 

 

 

 

 

 

Conducted noise

product to the power line is

500 k-30 MHz QP

: 73 dB, Mean : 60 dB

 

 

 

measured.

 

 

 

 

 

 

 

 

 

 

 

EN61000-4-2

Immunity test in which static

 

 

 

 

 

 

electricity is applied to the cabinet of

15 k V Aerial discharge

 

 

 

 

Electrostatic immunity 2

 

 

 

 

the equipment.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

EN61000-4-4

Immunity test in which burst noise is

Power line

: 2 kV

 

 

 

Digital I/O (24 V or higher) : 1 kV

 

 

EN61131-2 :

Fast transient burst noise 2

applied to the power line and signal

(Digital I/O (24 V or less)) > 250 V

 

 

 

 

lines.

(Analog I/O, signal lines) > 250 V

 

 

1996

 

 

 

 

 

EN61000-4-3

Immunity test in which field is

10 V/m, 26-1000 MHz,

 

 

 

 

 

 

 

 

Radiated field AM

 

 

 

 

irradiated to the product.

80%AM modulation@1 kHz

 

 

 

 

modulation

2

 

 

 

 

 

 

 

 

 

 

 

EN61000-4-12

Immunity test in which a damped

Power line

: 1 kV

 

 

 

Damped oscillatory wave

oscillatory wave is superimposed on

 

 

 

Digital I/O (24 V or higher) : 1 kV

 

 

 

immunity

 

the power line.

 

 

 

 

 

(1) QP : Quasi-peak value, Mean : Average value

(2) The PLC is an open type device (device installed to another device) and must be installed in a conductive control panel. The tests for the corresponding items were performed while the PLC was installed inside a control panel.

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