Product Overview

The Allen-Bradley 1746-NI16V​ is a high-density analog voltage input module designed for the SLC 500 programmable controller family of Rockwell Automation, delivering sixteen single-ended voltage input channels from a single chassis slot. In an SLC 500 rack where slot count is always at a premium, the Allen-Bradley 1746-NI16V​ gives engineers a way to acquire a large number of continuous process variables without dedicating several slots to four-channel cards, which is precisely why it has become a standard choice for brownfield SLC installations that need more analog capacity without a platform migration.Each of the sixteen channels on the Allen-Bradley 1746-NI16V​ is individually software configurable for ±10V DC, 0–10V DC, 0–5V DC or 1–5V DC operation, so a single module can serve a mixed population of pressure transducers, potentiometers, position feedback devices, analyser outputs and drive speed references at the same time. Conversion is performed by a Sigma-Delta converter at 16-bit resolution, equivalent to 312 µV per count, and the module communicates with the SLC processor over the parallel backplane interface while drawing its operating power from the chassis supply.What distinguishes the Allen-Bradley 1746-NI16V​ in everyday service is its configurability rather than raw channel count alone. A programmable low-pass digital filter with eight selectable corner frequencies from 6 Hz to 250 Hz lets the user trade noise rejection against response speed, the data format can be switched between engineering units, PID-scaled values and proportional counts to match the control strategy, and 500V AC isolation protects the processor and backplane from field-side transients. Configuration is carried out entirely in RSLogix 500, without DIP switches or jumpers, so channel ranges and filtering can be changed during commissioning without touching the hardware.

Technical Specifications