Chapter 11 Compliance with EMC Specifications
11-1
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
noise
*
2
Measure the wave emitted from a product.
30~230
㎒
QP : 50
㏈㎶
/m
*
1
230~1000
㎒
QP : 57
㏈㎶
/m
EN55011 conducted
noise
Measure the noise that a product emits to the
power line.
150~500
㎑
QP : 79
㏈
Mean : 66
㏈
500~230
㎒
QP : 73
㏈
Mean : 60
㏈
EN61131-2
EN61000-4- Electrostatic
immunity
Immunity test allowing static electricity to the
case of a device.
15
㎸
Air discharge
8
㎸
Contact discharge
EN61000-4-4
Fast transient burst noise
Immunity test allowing a fast noise to power
cable and signal cable.
Power line : 2
㎸
Digital I/O : 1
㎸
Analogue I/O, signal lines : 1
㎸
EN61000-4-3
Radiated field AM
modulation
Immunity test injecting electric field to a
product.
10Vm, 26~1000
㎒
80% AM modulation@ 1
㎑
EN61000-4-12
Damped oscillatory wave
immunity
Immunity test allowing attenuation vibration
wave to power cable.
Power line : 1
㎸
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.