Grounding - Omron NT31 Operation Manuals

Installation
Note
3-1-4

Grounding

Notice
40
S Power supply
The applicable power supply specifications are as follows.
Power supply
Allowable power supply voltage fluctuation range
Power supply voltage capacity
S Parts used for connection
For the connection to the power supply terminal block, twisted wires of 2 mm
greater cross sectional area and M3.5 size crimp terminals must be used.
Tighten the screws on the terminal block to a torque of 0.8 N⋅m.
Fork type
7 mm or less
- Recommended terminals
Maker
Japan Solderless Terminal MFG
Fuji Terminal
Nichifu Terminal
The NT31/NT31C has a functional ground terminal (
Carry out wiring under the following conditions.
(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 (
NT31/NT31C.
(3) If the NT31/NT31C is installed in the same panel as equipment that generates
noise, such as a motor or inverter, do not ground the functional ground termi-
nal ( ) of the NT31/NT31C.
NT31/
Host
NT31C
Class 3
grounding
Fig. (a)
Carry out grounding correctly in order to prevent misoperation due to noise.
Item
Round type
7 mm or less
Type
(fork type)
2-YS3A
2-YAS3.5
2Y-3.5
NT31/
NT31C
Grounding at
a single point
Section 3-1
Value
24 VDC
20.4 VDC to 26.4 VDC
(24 VDC –15%, +10%)
15 W or more
Type Applicable Wire
(round type) (stranded wire)
2-3.5
2.0 to 2.63 mm
V2-S3.5
2-3.5
).
Host
Fig. (b)
2
or
2
) of the