2 Installing the NB Unit and Connecting Peripheral Devices
2-6
NB-series Programmable Terminals Setup Manual(V107)
The NB Unit has a functional grounding terminal ( ).
Arrange the wiring according to the following conditions.
1
When a potential difference occurs between the NB Unit and the host, arrange the grounding as
illustrated. If the distance is too long to realize a single-point grounding, do not ground the
of the NB Unit.
2
When the NB Unit, and noise source equipment such as motors and inverters, etc. are installed
on the same panel, do not ground the of the NB Unit.
Precautions for Safe Use
To prevent malfunctions caused by noise, ground the Unit correctly.
2-1-4 Grounding Wiring
NB Unit Host
Single-point
grounding
WWW.NNC.IR
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