Wiring The Ground Wire - Omron NS - SETUP Setup Manual

NS15, 12, 10, 8
24 VDC
•
Parts Used to Connect the Power Supply
Precautions
for Safe Use
7 mm max.
• Recommended Products
J.S.T. Mfg. Co., Ltd.
Fuji Terminal Industry Co., Ltd.
Nichifu Terminal Industries Co., Ltd.
Precautions
for Safe Use
3-1-5

Wiring the Ground Wire

The PT is provided with a functional ground (FG:
Wire the FG terminal according to the following conditions.
1. Ground according to Figure when there is difference in potential between the PT and
host. Do not ground the functional ground of the PT if it is far from the host and one-point
grounding is difficult.
2. Do not ground the functional ground (FG:
as devices that generate noise, such as motors and inverters.
Functional ground
Connect power to the power terminal block using twisted-pair power lines with a
cross-sectional area of at least 2 mm
The correct tightening torque for the terminal block is 0.8 N⋅m. Tighten terminal
block screws properly.
Forked type
Manufacturer
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
PT Host
One-point
grounding
Breaker
24 VDC
power
supply
Round type
7 mm max.
Model number of
forked terminals
2-YS3A
2-YAS3.5
2Y-3.5
) of the PT if it is mounted to the same panel
NS5
24 VDC
Breaker
24 VDC power supply
2
and always using M3.5 crimp terminals.
Model number of
round terminals
2-3.5
V2-S3.5
2-3.5
) terminal.
3-1 Installing the PT
Functional
ground
Applicable power
lines (twisted-pair)
2.0 to 2.63 mm 2
3-7