The 1746-NR4 is obsolete. Allen Bradley stopped actively pushing SLC 500 hardware years ago. But "obsolete" isn't the same as "useless." The manual represents a time when engineers wrote documents to educate , not just to comply with ISO standards.
High-resolution 16-bit analog-to-digital conversion. 1746-nr4 manual
However, a module is only as good as the documentation that supports it. The is not just a booklet; it is the Rosetta Stone for configuring, calibrating, and troubleshooting this precise analog device. Whether you are maintaining a legacy system or integrating an old module into a new SCADA network, accessing and understanding the correct manual is critical. The 1746-NR4 is obsolete