Electrical Environment - Omron NJ501-1400 User Manual

4 Installation and Wiring
4-5-5

Electrical Environment

When installing or wiring devices, make sure that there will be no danger to people and that noise will
not interfere with electrical signals.
Controller Installation Location
Install the Controller as far away as possible from high-voltage (600 V or higher) and power devices to
ensure safe operation and maintenance.
OK
NG
Examples of Equipment Arrangement in Panel with High-voltage Devices
Arrangement of Controller and Units
Observe the following points.
• Place a Unit that does not generate much noise next to the CPU Unit, such as an Input Unit or Com-
munications Unit.
• The coils and contacts in electromagnetic contactors and relays in an external circuit are sources of
noise. Do not install them close to the Controller. Locate them at least 100 mm away from the Con-
troller.
4-52
Example of Recommended Equipment Arrangement
Controller
Control panel Control panel
Example of Poor Equipment Arrangement
Control panel Control panel
DC I/O
AC I/O
device device
Terminal block
Example of Arrangement in Panel
High-voltage
power panel
Controller
High-voltage
power panel
NJ-series CPU Unit Hardware User's Manual (W500)