National Instruments RS422 User Manual

This document describes how to use the National Instruments 9871 
and includes specifications and pin assignments for the NI 9871. 
Visit 

ni.com/info

 and enter 

rdsoftwareversion

 to determine 

which software you need for the modules you are using. For 
information about installing, configuring, and programming the 
system, refer to the system documentation. Visit 

ni.com/info

 and 

enter 

cseriesdoc

 for information about C Series documentation.

The safety guidelines and specifications in this 

document are specific to the NI 9871. The other 
components in the system might not meet the same safety 
ratings and specifications. Refer to the documentation for 
each component in the system to determine the safety 
ratings and specifications for the entire system. Visit 

ni.com/info

 and enter 

cseriesdoc

 for information 

about C Series documentation.

Operate the NI 9871 only as described in these operating 
instructions.

This icon denotes that the component may be 

hot. Touching this component may result in bodily injury.