Allen-Bradley 1746-NI16I

Technical specifications

Manufacturer

Allen-Bradley

Manufacturer part no.

1746-NI16I

Type

Analog input module

Application

I/O module

Used with

SLC 500 1746 chassis

Backplane current (mA) @ 5V

125 mA

Backplane current (mA) @ 24V

75 mA

Backplane power consumption

2.425 W max (0.625 W @ 5V DC, 1.8 W @ 24V DC)

Isolation voltage

Tested @ 500V AC and 710V DC for 60 s

Number of inputs

16

Resolution

16-bit

A/D conversion method

Sigma Delta

Common mode voltage range

±10.25V relative to the analog common terminal (20.5V maximumbetween any two signal terminals)

Input filter frequencies

6 Hz 10 Hz 20 Hz 40 Hz 60 Hz 80 Hz 100 Hz 250 Hz

Type of Input (selectable)

0…20 mA ±20 mA 4…20 mA 0…1 mA

Type of data (selectable)

Engineering Units, Scaled for PID, Proportional Counts (-32,768…32,767 range), Proportional Counts (User-Defined Range, Class 3 only) 1746-NI4 Data Format

Maximum voltage input without

±8V between analog common and any input terminal

Current input (maximum)

±30 mA between analog common and any input terminal

Time to detect open circuit

less than 5 s

Input resolution

640 nA

Display resolution

0.3%

Module error over full operating

0.08% of full scale @ 25 °C (77 °F) 0.15% of full scale @ 60 °C (140 °F)

Input offset drift with temperature

360 nA/°C

Gain drift with temperature

20 ppm/°C

Calibration accuracy @ 25 °C

better than 0.15% of range

Calibration

Factory calibrated.

Technical documents (1)

• Rockwell Automation SLC 500 systems selection guide 1747-SG001

Key features

• Selectable input types: 0…20 mA, ±20 mA, 4…20 mA, 0…1 mA
• Input filter frequencies from 6 Hz to 250 Hz
• Factory calibrated, accuracy better than 0.15% of range at 25 °C
• Isolation tested at 500V AC and 710V DC for 60 s
• Backplane current of 125 mA at 5V and 75 mA at 24V

About the Allen-Bradley 1746-NI16I

The 1746-NI16I is an SLC 16 point analog current input module, now discontinued. Its 16 inputs use 16-bit Sigma Delta A/D conversion, with selectable types of 0…20 mA, ±20 mA, 4…20 mA and 0…1 mA (selection guide 1747-SG001). Module error is 0.08% of full scale at 25 °C and 0.15% of full scale at 60 °C. It is factory calibrated and draws 125 mA at 5V and 75 mA at 24V from the backplane.

What is the 1746-NI16I used for?

It reads up to 16 current loops into an SLC 500 system. Data can be returned as Engineering Units, Scaled for PID or Proportional Counts, and an open circuit is detected in less than 5 s.

Lifecycle and successor

Discontinued (Rockwell Automation lifecycle status, checked 24 October 2026).

Before you order

What to photograph or confirm so the right unit is quoted.

Read the catalog number 1746-NI16I, the series letter and the firmware revision from the label. Send us a photo of the label and we confirm the match before we quote.