Omron NT31 NT31C manual Grounding, Fig. a

Installation Section 3-1

3-1-4 Grounding

The NT31/NT31C has a functional ground terminal ().

Carry out wiring under the following conditions.

1, 2, 3... 1. In cases where the distance between the NT31/NT31C is small and it is as- sumed that there is no potential difference between grounds, ground as shown in Fig. (a) below.

2.In cases where there is a potential difference between the grounds of the NT31/NT31C and the host, ground as shown in Fig. (b). If there is some dis-

tance between the NT31/NT31C and host and grounding at a single point is difficult, do not connect the functional ground terminal () of the NT31/NT31C.

3.If the NT31/NT31C is installed in the same panel as equipment that gener-

ates noise, such as a motor or inverter, do not ground the functional ground terminal () of the NT31/NT31C.

NT31/			NT31/
		Host				Host
NT31C			NT31C
			Groundin		g at
			a single		point
	Ground to
	100 Ω max.
	Fig. (a)			Fig. (b)

Note Carry out grounding correctly in order to prevent operating errors due to noise.

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