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Chapter 12 Compliance with EMC Specifications
12.1 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 ML200 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.
12.1.1 EMC specifications
The EMC specifications affecting the PLC are as follows.
Specification
Test items
EN55011 Radiated
noise ＊2
EN55011 conducted
EN50081-2
noise
EN61000-4-
Electrostatic
immunity
EN61000-4-4
Fast transient burst
noise
EN61131-2
EN61000-4-3
Radiated field AM
modulation
EN61000-4-12
Damped oscillatory
wave immunity
＊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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Pnet I/F Module 2MLL-PSRA, 2MLL-PMEA, 2MLL-PMEB User's Guide
Chapter 12 Compliance with EMC Specifications
Test details
Measure the wave emitted from a
product.
Measure the noise that a product emits
to the power line.
Immunity test allowing static electricity to
the case of a device.
Immunity test allowing a fast noise to
power cable and signal cable.
Immunity test injecting electric field to a
product.
Immunity
test
allowing
vibration wave to power cable.
[Table 12.1.1] EMC specification list
Honeywell
Standard value
30~230 ㎒ QP : 50 ㏈㎶/m ＊1
230~1000 ㎒ QP : 57 ㏈㎶/m
150~500 ㎑ QP : 79 ㏈
Mean
500~230 ㎒ QP : 73 ㏈
Mean
15 ㎸ Air discharge
8 ㎸ Contact discharge
Power line : 2 ㎸
Digital I/O : 1 ㎸
Analogue I/O, signal lines : 1 ㎸
10Vm, 26~1000 ㎒
80% AM modulation@ 1 ㎑
Power line : 1 ㎸
attenuation
Digital I/O(24V and higher) : 1
㎸
: 66 ㏈
: 60 ㏈
R220
January 2019
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