LS Industrial Systems XBC-E Series - Appendix 3 EMC Standard; A3.1 Requirements for Conformance to EMC Directive

Appendix 3 EMC Standard
XBC E-Type Main Unit App. 3-1 Ver. 1
Appendix 3 EMC Standard
A3.1 Requirements for Conformance to EMC Directive
The EMC Directive specifies products must “be so constructed that they do not cause excessive electromagnetic
interference (emissions) and are not unduly affected by electromagnetic interference (immunity)”. This section
summarizes the guidelines to conform with the EMC Directive. However, LSIS will not guarantee that the overall
machinery manufactured according to these details conforms to the below-described directives. It is up to the
manufacturer of the machinery to select the method of conforming with the EMC directive and ensure the
machinery meets the EMC directive.
A3.1.1 EMC Standard
Specification Test item Test details Standard value
EN50081-2
EN55011
Radiated EM noise
＊
2
Electromagnetic emissions from the
product are measured
30~230
㎒
QP : 50
㏈㎶
/m
＊
1
230~1000㎒ QP : 57㏈㎶/m
EN55011
Conducted EM
noise
Electromagnetic emissions from the
product to the power line is measured
150~500
㎑
QP : 79
㏈
Mean: 66
㏈
500~230㎒ QP : 73㏈ Mean: 60㏈
EN61131-2
EN61000-4-2
Electrostatic
immunity
Immunity test in which static electricity is
applied to the case of the equipment
15
㎸
Aerial discharge
8㎸ Contact discharge
EN61000-4-4
Fast transient
burst noise
Immunity test in which burst noise is
applied to the power line and signal lines
Power line: 2
㎸
Digital /O : 1㎸
Analog I/O, signal lines: 1
㎸
EN61000-4-3
Radiated field AM
modulation
Immunity test in which PLC is exposed to
AM field.
10Vm,26~1000
㎒
80%AM modulation@ 1㎑
EN61000-4-12
Damped oscillatory
wave immunity
Immunity test in which a damped
oscillatory wave is superimposed on the
power line
Power line: 1
㎸
Digital I/O (24V or higher): 1㎸
＊1) QP: Quasi-peak value, Mean: Average value
＊2) The PLC 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.
A3.1.2 Control Panel
PLC must be installed within an enclosed control panel to prevent the risk of electric shock and reduce electrical
noise generated by the PLC.
1. C
ontrol Panel
a. Use SPCC (Cold Rolled Mild Steel) for the enclosure.
b. 1.6mm minimum subpanel thickness.
c. Use isolating transformers to protect the power supply from external surge voltage.
d. The control panel must be EM insulated.
e. To ensure good electrical contact between the enclosure and subpanel, remove paint
so that good surface contact can be made between the enclosure and subpanel.
2. Power and Earth Wiring
a. Use a large gauge wire for earthing to insure the lowest possible impedance.
i. PE terminals pass EM noise generated in the PLC system to ground.