Omron SmartSlice GRT1 Series Operation Manual page 19

EC Directives
Complying with EC Directives
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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 150 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, EN 61000-6-2 (Immunity
Zone A), and EN 61000-6-4 standards, but the radiated emission charac-
teristics (10-m regulations) may vary depending on the configuration of the
control panel used, other devices 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.
Ferrite Core (Data Line Filter): 0443-164151 (manufactured by Nisshin Electric)
Impedance specifications
156 Ω
25 MHz:
100 MHz: 250 Ω
30 mm
13 mm 29 mm
2. Wire the control panel with as thick and short cables as possible and
ground to 100 Ω min.
3. Keep DeviceNet communications cables as short as possible and ground
to 100 Ω min.
33 mm
6