6
Conformance to EC Directives
xvii
•
UL standards required that batteries be replaced only by experienced techni-
cians. Do not allow unqualified persons to replace batteries.
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 ma-
chines. The actual products have been checked for conformity to EMC stan-
dards (see the following note). Whether the products conform to the standards 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 cus-
tomer must, therefore, perform final checks to confirm that devices and the over-
all machine conform to EMC standards.
Note Applicable EMC (Electromagnetic Compatibility) standards are as follows:
EMS (Electromagnetic Susceptibility):
EN61131-2
EMI (Electromagnetic Interference):
EN50081-2
(Radiated emission: 10-m regulations)
Low Voltage Directive
Always ensure that devices operating at voltages of 50 to 1,000 VAC or 75 to
1,500 VDC meet the required safety standards for the PC (EN61131-2).
6-3
Conformance to EC Directives
The CS1-series PCs comply with EC Directives. To ensure that the machine or
device in which a CS1-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 (EN50081-2). 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
depending 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 CS1-series PCs conforms to the Common Emission Standards
(EN50081-2) of the EMC Directives. However, noise generated by relay output
switching may not satisfy these Standards. In such a case, a noise filter must be
connected to the load side or other appropriate countermeasures must be pro-
vided external to the PC.
