Precautions for Safe Use
• Always turn OFF the power supply before mounting the NX Units. If the power supply is not
OFF, the Unit may malfunction or may be damaged.
•
Do not apply labels or tape to the Units. When the Units are installed or removed, adhesive or
scraps may adhere to the pins in the NX bus connector, which may result in malfunctions.
• Do not touch the pins in the NX bus connector on the Unit. Dirt may adhere to the pins in the
NX bus connector, which may result in malfunctions.
Example: NX Unit (12 mm width)
NG
NG
• Do not write on an NX Unit with ink within the restricted region that is shown in the following
figure. Also do not get this area dirty. When the Unit is installed or removed, ink or dirt may
adhere to the pins in the NX bus connector, which may result in malfunctions in the CPU
Rack.
Restricted region
(shaded portion)
Precautions for Correct Use
• When you mount an NX Unit to the CPU Unit or when you connect NX Units to each other,
always mount the Units one at a time on the DIN Track. If you connect NX Units to each other
and attempt to mount them together to the DIN T
rack at the same time, the Units may sepa-
rate from each other and fall.
• When you handle a Unit, be careful not to apply stress to the pins in the NX bus connector.
If the Unit is installed and the power supply is turned ON when the pins in the NX bus con-
nector are deformed, contact failure may cause malfunctions.
• When you handle a Unit, be careful not to touch or bump the pins in the NX bus connector.
5 Installation and Wiring
5-21
NX-series NX1P2 CPU Unit Hardware User’s Manual (W578)
5-3 Mounting and Removing Units
5
5-3-4 Installing and Connecting NX Units
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