Справочник Пользователя для Mitsubishi Electronics Mitsubishi Digital Electronics Electronic Accessory Q02CPU

 

 

 

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MELSEC-Q

 

8   EMC AND LOW VOLTAGE DIRECTIVE 

 

8.2 Requirement to Conform to the Low Voltage Directive 

The Low Voltage Directive requires each device that operates with the power supply 

ranging from 50 to 1000VAC and 75 to 1500VDC to satisfy the safety requirements. 

In Sections 8.2.1 to 8.2.6, cautions on installation and wiring of the MELSEC-Q series 

PLC to conform to the Low Voltage Directive are described. 

We have put the maximum effort to develop this material based on the requirements 

and standards of the regulation that we have collected. However, compatibility of the 

devices which are fabricated according to the contents of this manual to the above 

regulation is not guaranteed. Each manufacturer who fabricates such device should 

make the final judgement about the application method of the Low Voltage Directive 

and the product compatibility. 

 

8.2.1 Standard applied for MELSEC-Q series PLC 

The standard applied for MELSEC-Q series PLC is EN61010-1 safety of devices used 

in measurement rooms, control rooms, or laboratories. 

 

The MELSEC-Q series PLC modules which operate at the rated voltage of 

50VAC/75VDC or above are also developed to conform to the above standard. 

The modules which operate at the rated voltage of less than 50VAC/75VDC are out of 

the Low Voltage Directive application range. 

 

8.2.2 MELSEC-Q series PLC selection 

(1)   Power supply module 

There are dangerous voltages (voltages higher than 42.4V peak) inside the 

power supply modules of the 100/200VAC rated I/O voltages. Therefore, the CE 

marked models are enhanced in insulation internally between the primary and 

secondary. 

 

(2)   I/O module 

There are dangerous voltages (voltages higher than 42.4V peak) inside the I/O 

modules of the 100/200VAC rated I/O voltages. Therefore, the CE marked 

models are enhanced in insulation internally between the primary and secondary. 

The I/O modules of 24VDC or less rating are out of the Low Voltage Directive 

application range. 

 

(3)   CPU module, memory card, base unit 

Using 5VDC circuits inside, the above modules are out of the Low Voltage 

Directive application range. 

 

(4)   Intelligent function modules (special function modules) 

The intelligent function modules (special function modules) such as the analog, 

network and positioning modules are 24VDC or less in rated voltage and are 

therefore out of the Low Voltage Directive application range. 

 

(5)   Display device 

Use the CE marked display device.