Chapter 11 Compliance with EMC Specifications
Chapter 11 Compliance with EMC Specifications
11.1 Requirements Complying with EMC Specifications
EMC Directions describe “Do not emit strong electromagnetic wave to the outside: Emission” and “Do not have an influence of
electromagnetic wave from the outside: Immunity”, and the applicable products are requested to meet the directions. The chapter
summarizes how to structure a system using XGT PLC to comply with the EMC directions. The description is the data summarized for
the requirements and specifications of EMC regulation acquired by the company but it does not mean that every system
manufactured according to the description meets the following specifications. The method and determination to comply with the EMC
directions should be finally determined by the system manufacturer self.
11.1.1 EMC specifications
The EMC specifications affecting the PLC are as follows.
Specification Test items Test details Standard value
EN50081-2
EN55011 Radiated
Measure the wave emitted from a product. 30~230 ㎒ QP : 50 ㏈㎶/m ＊1
Measure the noise that a product emits to the
power line.
150~500 ㎑ QP : 79 ㏈
Mean : 66 ㏈
500~230 ㎒ QP : 73 ㏈
EN61000-4- Electrostatic
immunity
Immunity test allowing static electricity to the
case of a device.
Fast transient burst noise
Immunity test allowing a fast noise to power
Analogue I/O, signal lines : 1
Immunity test injecting electric field to a
Immunity test allowing attenuation vibration
Digital I/O(24V and higher) : 1 ㎸
[Table11.1.1] EMC Specifications
＊1 : QP: Quasi Peak, Mean : average value
＊2 : PLC is a type of open device(installed on another device) and to be installed in a panel.
For any applicable tests, the system is tested with the system installed in a panel.
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