4 Installation and Wiring
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NJ-series CPU Unit Hardware User’s Manual (W500)
b) Connecting devices and noise sources to a common earth electrode
This is an earthing method to connect the device that is connected with a communications cable,
other devices, and a device that could be a noise source, to a common earth electrode.
This earthing method is not recommended because the device that could be a noise source may
interfere electromagnetically with other devices.
Daisy Chain
This is an earthing method to connect the device that is connected with a communications cable,
other devices, and a device that could be a noise source using a daisy-chain topology to a common
earth electrode.
This earthing method is not recommended because the device that could be a noise source may
interfere electromagnetically with other devices.
Control panel
Hub
Other device NJ-series CPU Units
A device that could be
a noise source
10 m min.
PLC
Hub
PLC
Control panel
Other device NJ-series CPU Units
A device that could be
a noise source
Hub
PLC
Control panel
Other device NJ-series CPU Units
A device that could be
a noise source
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