Omron SMARTSLICE - 04-2008, Operation Manual

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EC Directives 6
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.
1,2,3... 1. The DeviceNet Communications Units are designed for installation inside
control panels. All DeviceNet 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. The power supplies must also be able to pro-
vide stable output for 10 ms when a momentary power interruption occurs
at the input.
3. The DeviceNet Communications Units conform to the EN61131-2 (Immu-
nity Zone A), EN61000-6-2, and EN61000-6-4 standards, but the radiated
emission characteristics (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.
1,2,3... 1. Noise from the communications cable can be reduced by installing a ferrite
core on the communications cable within 10 cm of the DeviceNet Commu-
nications Unit.
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.
Ferrite Core (Data Line Filter): 0443-164151 (manufactured by Nisshin Electric)
Impedance specifications
25 MHz:
156
Ω
100 MHz: 250
Ω
30 mm
13 mm 29 mm
33 mm