Omron F440-F User Manual page 45

2 Installation and Connections
2-5-2 Grounding and Power
Proper grounding is necessary for operator safety, noise reduction, and the protection of equipment
from voltage transients. Buildings, including any steelwork, all circuits, and all junction boxes must be
grounded directly to an earth ground in compliance with local and national electrical codes.
An earth ground is provided through the cable shields and chassis of the camera.
If the camera malfunctions due to influence of the environment by shield cables grounded, try any of
the ones below.
• Disconnect the chassis and the shield cable of the power supply from the earth.
• Ground the shield cable of the power supply to –(0V).
• Ground any of one part of the shield cable, chassis, or RJ-45 connector of Ethernet cable
to earth with D class grounding. Use a Class 2 power supply for the DC source.
Note: In the case of this connection, must not ground the +(24V) of the power supply. If connected,
the device will break down due to a short circuit.
Ground Loops
Ground loops (signal degradation due to different ground potentials in communicating devices) can be
eliminated or minimized by ensuring that both the host, camera, and their power supplies are connected
to a common earth ground.
Note: If a malfunction occurred to your reader by noise, mount a noise filter (RSAL2001W manufactured
by TDK-Lambda Corp.) close to the camera's power-supply terminals and ground the chassis of the filter.
2-22
F440-F C-Mount Smart Camera User Manual