Precautions for Safe Use
Transporting
• When transporting any Unit, use the special packing box for it.
Also, do not subject the Unit to excessive vibration or shock during transportation.
• Do not drop any Unit or subject it to abnormal vibration or shock.
Doing so may result in Unit malfunction or burning.
Mounting
• Mount terminal blocks and connectors only after checking the mounting location carefully.
• Be sure that the terminal blocks, expansion cables, and other items with locking devices are proper-
ly locked into place.
Installation
• Always turn OFF the power supply before installing the Unit. If the power supply is not OFF, the Unit
may malfunction or may be damaged.
• Always turn OFF the Unit power supply and I/O power supply before you remove the NX Unit.
• Do not apply labels or tape to the Unit. When the Unit is 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)
N
G 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 or the Slave Termi-
nal.
Refer to the user’s manual for the connected CPU Unit, Communications Coupler Unit, or Commu-
nication Control Unit for details on the restricted region on the CPU Unit, Communications Coupler
Unit, or Communication Control Unit.
Precautions for Safe Use
20
NX-series System Units User's Manual (W523)
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