Grounding - Omron NT31 Setup Manual

Installation

3-1-4 Grounding

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Note When surge noise occurs in the DC power supply, connect a Transistor Voltage
Suppressor (TVS) between the 24-V and 0-V DC terminals.
Recommended TVS model: 1.5KE33CA
Manufacturers: Vishay Intertechnology Inc, ST Microelectronics
The NT31/NT31C has a functional ground terminal (
Carry out wiring under the following conditions.
1. In cases where there is a potential difference between the grounds of the
NT31/NT31C and the host, ground as shown in the following figure. If there
is some distance between the NT31/NT31C and host and grounding at a
single point is difficult, do not connect the functional ground terminal (
the NT31/NT31C.
2. 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.
Note Carry out grounding correctly in order to prevent operating errors due to noise.
NT31/
Host
NT31C
Grounding at
a single point
Section 3-1
).
) of