Allen-Bradley 1746-OA8

Technical specifications

Manufacturer

Allen-Bradley

Manufacturer part no.

1746-OA8

Type

Digital output module

Application

I/O module

Used with

SLC 500 1746 chassis

Number of outptus

8

Points per common

4

Voltage category

120/240V AC

Operating voltage range

85…265V AC @ 47…63 Hz

Backplane current (mA) @ 5V

185 mA

Backplane current (mA) @ 24V

0 mA

Voltage drop, on-state output, max

1.50V @ 1.0 A

Load current, min

10 mA

Leakage current, off-state output, max

2 mA

Surge current per point, max

10 A for 25 ms

Signal on delay, max (resistive load)

1 ms

Signal off delay, max (resistive load)

11 ms

Continuous current per point

1.0 A @ 30 °C (86 °F) 0.50 A @ 60 °C (140 °F)

Continuous current per module

8.0 A @ 30 °C (86 °F) 4.0 A @ 60 °C (140 °F)

Technical documents (1)

• Rockwell Automation SLC 500 systems selection guide 1747-SG001

Key features

• Eight outputs with four points per common
• Operating range 85…265V AC at 47…63 Hz
• Continuous current 1.0 A per point at 30 °C
• Surge current 10 A per point for 25 ms
• Draws 185 mA at 5V and 0 mA at 24V

About the Allen-Bradley 1746-OA8

The 1746-OA8 is an SLC 8 point AC output module, now discontinued. Its 8 outputs sit at 4 points per common in the 120/240V AC category, working from 85…265V AC at 47…63 Hz, with an on-state voltage drop of 1.50V at 1.0 A maximum. Continuous current is 1.0 A per point and 8.0 A per module at 30 °C (86 °F), falling to 0.50 A per point and 4.0 A per module at 60 °C (140 °F).

What is the 1746-OA8 used for?

It switches AC loads from an SLC 500 controller, with up to 1.0 A per point. Minimum load current is 10 mA and off-state leakage 2 mA maximum. With a resistive load the signal delays are 1 ms on and 11 ms off.

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-OA8, 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.