Allen-Bradley 1746-NO8I

Technical specifications

Manufacturer

Allen-Bradley

Manufacturer part no.

1746-NO8I

Type

Analog output module

Application

I/O module

Used with

SLC 500 1746 chassis

Backplane current (mA) @ 5V

120 mA

Backplane current (mA) @ 24V

250 mA

Backplane power consumption

5.6 W

Thermal dissipation, max

6.6 W

Isolation voltage

Tested @ 500V DC

Number of outputs

8

Output type

Current

Output range

0…21.5 mA

Output coding (proportional scaling)

0…32,767

Resolution

16-bit 366 nA/count

Non-Linearity

0.06% of full scale

DAC conversion method

R-2R Ladder Network

Output step response

1 ms (0…95% of full scale)

Channel update time (typical)

Class 1: 5 ms to update all 8 channels, Class 3: 10 ms to update all 8 channels

Overrange capability

7.5% (21.5 mA)

Overall accuracy

0.1% of full scale @ 25 °C (77 °F) 0.2% of full scale @ 60 °C (140 °F)

Overall accuracy drift, max

±33 ppm/°C of full scale

Gain error

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

Gain error drift, max

±25 ppm/°C of full scale

Calibration

Factory calibrated.

Technical documents (1)

• Rockwell Automation SLC 500 systems selection guide 1747-SG001

Key features

• Eight current outputs per module
• Output range of 0 to 21.5 mA
• 16-bit resolution at 366 nA per count
• Factory calibrated
• Isolation voltage tested at 500V DC

About the Allen-Bradley 1746-NO8I

The 1746-NO8I is an SLC 8 point 20 mA output module, now discontinued. Its eight current outputs cover 0 to 21.5 mA at 16-bit resolution, 366 nA/count. Overall accuracy is 0.1% of full scale at 25 °C (77 °F) and 0.2% at 60 °C (140 °F). It draws 120 mA at 5V and 250 mA at 24V from the backplane.

What is the 1746-NO8I used for?

It sends eight current signals from an SLC 500 controller, with output coding of 0 to 32,767 across 0 to 21.5 mA. Step response is 1 ms to 95% of full scale, and the typical update time for all 8 channels is 5 ms in Class 1 and 10 ms in Class 3.

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-NO8I, 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.