Regulations and Standards
24
NX-series Digital I/O Unit User’s Manual (W521)
• This is a Class A product (for industrial environments). In a residential environment, it may cause 
radio interference. If radio interference occurs, the user may be required to take appropriate mea-
sures.
Some NX-series products comply with UL and CSA standards. If you use an NX-series product that 
complies with UL or CSA standards and the machinery or system in which you use the NX-series prod-
uct must also comply with the standards, refer to the Instruction Sheet that is provided with the product. 
The Instruction Sheet provides the application conditions for complying with the standards.
Some NX-series products comply with shipbuilding standards. If you use an NX-series product that 
complies with shipbuilding standards and the machinery or system in which you use the NX-series 
product must also comply with the standards, consult with your OMRON representative. Application 
conditions are defined according to the installation location. Application may not be possible for some 
installation locations.
For usage conditions for shipbuilding standards, refer to Conformance to Shipping Standards in the 
user's manual for the CPU Unit or Communications Coupler Unit that the NX Units are connected to.
Observe the following precaution if you use NX-series Units in Korea.
Class A Device (Broadcasting Communications Device for Office Use)
This device obtained EMC registration for office use (Class A), and it is intended to be used in places 
other than homes.
Sellers and/or users need to take note of this.
This product incorporates certain third party software. The license and copyright information associated 
with this software is available at http://www.fa.omron.co.jp/nj_info_e/.
Conformance to UL and CSA Standards
Conformance to Shipbuilding Standards
Conformance to KC Standards
Software Licenses and Copyrights