Ec Directives - Omron GRT1 - 11-2007 Operation Manual

EC Directives

6 EC Directives
Complying with EC Directives
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• Correctly connect the Slice I/O Units to each other. The I/O power supply
will become disconnected if the base blocks on the Slice I/O Units are not
connected correctly.
While outputs are being transmitted from the Communications Unit, the
output indicators on the Slice Output Unit will be lit, but the outputs will
actually be OFF.
DeviceNet products conform to EMS and low-voltage level directives as fol-
lows:
EMC Directive
OMRON devices that comply with EC Directives also conform to the related
EMC standards, so that they can more easily be built in to other devices or the
overall machine. The actual products have been checked for conformity to
EMC standards. Whether they 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 on which the OMRON devices are installed.
The customer must, therefore, perform the final check to confirm that devices
and the overall machine conform to EMC standards.
Low Voltage Directive
Devices that operate at voltages from 50 to 1,000 VAC or 75 to 1,500 VDC
must satisfy the appropriate safety requirements. The applicable standard is
EN 61131-2.
1. The Slice I/O Units are designed for installation inside control panels. All
Slice I/O Units must be installed within control panels.
2. Use reinforced insulation or double insulation for the DC power supplies
used for the communications power supply, internal circuit power supply,
and the I/O power supplies. Ensure that stable outputs can be provided
even if a 10-ms interruption occurs at the input.
3. The Slice I/O Units conform to the EN 61131-2 (Immunity Zone A), EN
61000-6-2, and EN 61000-6-4 standards. AC power connections to Slice
I/O Units must use a protection network if the severity levels for Zone A are
exceeded. The radiated emission characteristics (10-m regulations) may
vary depending on the configuration of the control panel used, other devic-
es connected to the control panel, wiring, and other conditions. You must
therefore confirm that the overall machine or equipment complies with EC
Directives.
The following examples shows how to reduce noise.
1. Noise from the communications cable can be reduced by installing ferrite
cores on the communications cable within 10 cm of the DeviceNet Unit and
DeviceNet Communications Unit.
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