17
  Precautions for Safe Use
NX-series Analog I/O Units User’s Manual for Analog Input Units and Analog Output Units (W522)
• 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 or Communications Coupler Unit for the 
restricted region of CPU Unit and Communications Coupler Unit.
• For the installation orientations in the following figure, support the cables, e.g., with a duct, so that the 
End Plate on the bottom is not subjected to the weight of the cables. The weight of the cables may 
cause the bottom End Plate to slide downward so that the Slave Terminal is no longer secured to the 
DIN Track, which may result in malfunctions.
Restricted 
region (shaded 
portion)