4 Installation and Wiring
4-10
NJ-series CPU Unit Hardware User’s Manual (W500)
Accessibility for Operation and Maintenance
• To ensure safe access for operation and maintenance, separate the Controller as much as possi-
ble from high-voltage equipment and power machinery.
• It will be easy to operate the Controller if it is mounted at a height of 1.0 to 1.6 m above the floor.
Improving Noise Resistance
• Do not mount the Controller in a control panel containing high-voltage equipment.
• Install the Controller at least 200 mm away from power lines.
• Ground the mounting plate between the Controller and the mounting surface.
• When I/O Connecting Cables are 10 m or longer, connect the control panels in which Racks are
mounted with heavier power wires (3 wires at least 2 mm
2
in cross-sectional area).
Controller Orientation
• Each Rack must be mounted in an upright position to provide proper cooling.
• Do not install a Rack in any of the following positions.
NJ-series
Controller
Control
panel
Fan
Louver
NJ-series
Controller
Power lines
200 mm min.
200 mm min.
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