xxii
Conformance to EC Directives 6
6 Conformance to EC Directives
6-1 Applicable Directives
•EMC Directives
• Low Voltage Directive
6-2 Concepts
EMC Directives
OMRON devices that comply with EC Directives also conform to the related
EMC standards so that they can be more easily built into other devices or
machines. The actual products have been checked for conformity to EMC
standards (see the following note). Whether the products conform to the stan-
dards in the system used by the customer, however, must be checked by the
customer.
EMC-related performance of the OMRON devices that comply with EC Direc-
tives will vary depending on the configuration, wiring, and other conditions of
the equipment or control panel in which the OMRON devices are installed.
The customer must, therefore, perform final checks to confirm that devices
and the overall machine conform to EMC standards.
Note Applicable EMC (Electromagnetic Compatibility) standards are as follows:
EMS (Electromagnetic Susceptibility): EN61131-2
EMI (Electromagnetic Interference): EN61000-6-4
(Radiated emission: 10-m regulations)
Low Voltage Directive
Always ensure that devices operating at voltages of 50 to 1,000 V AC or 75 to
1,500 V DC meet the required safety standards for the PC (EN61131-2).
6-3 Conformance to EC Directives
The CQM1H-series PCs comply with EC Directives. To ensure that the
machine or device in which a CQM1H-series PC is used complies with EC
directives, the PC must be installed as follows:
1, 2, 3...
1. The PC must be installed within a control panel.
2. Reinforced insulation or double insulation must be used for the DC power
supplies used for the communications and I/O power supplies.
3. PCs complying with EC Directives also conform to the Common Emission
Standard (EN61000-6-4). When a PC is built into a machine, however,
noise can be generated by switching devices using relay outputs and
cause the overall machine to fail to meet the Standards. If this occurs,
surge killers must be connected or other measures taken external to the
PC.
The following methods represent typical methods for reducing noise, and
may not be sufficient in all cases. Required countermeasures will vary de-
pending on the devices connected to the control panel, wiring, the config-
uration of the system, and other conditions.
6-4 Relay Output Noise Reduction Methods
The CQM1H-series PCs conforms to the Common Emission Standards
(EN61000-6-4) of the EMC Directives. However, noise generated by relay out-
To Next Page
Loading...
Need help?
General
