Allen-Bradley 1756-OA16

Technical specifications

Manufacturer

Allen-Bradley

Manufacturer part no.

1756-OA16

Type

Digital output module

Application

I/O module

Used with

ControlLogix 1756 chassis

Time stamp of diagnostics

±1 ms

Fuse blown

One fuse and indicator/group

Outputs

16 mechanically fused/group (8 points/group)

Pilot duty

0.5 A

Voltage category

120/240V AC 50/60 Hz

Operating voltage range

74…265V AC 47…63 Hz

Output delay time

9.3 ms @ 60 Hz 11 ms @ 50 Hz 9.3 ms @ 60 Hz 11 ms @ 50 Hz

Current draw @ 5.1V

400 mA

Current draw @ 24V

2 mA

Total backplane power

2.1 W

Power dissipation, max

6.5 W @ 60 °C (140 °F)

Thermal dissipation

22.17 BTU/hr

Off-state leakage current, max

3 mA per point

On-state voltage drop, max

1.5V @ 0.5 A 5.7V @ load current < 50 mA

Current per point, max

0.5 A @ 60 °C (140 °F)

Current per group, max

2 A @ 60 °C (140 °F)

Current per module, max

4 A @ 60 °C (140 °F)

Surge current per point

5 A for 43 ms per point, repeatable every 2 s @ 60 °C (140 °F)

Surge current per group

15 A for 43 ms per group, repeatable every 2 s @ 60 °C (140 °F)

Load current, min

10 mA per point

Commutating voltage

4V/µs for loads > 50 mA 0.2V/µs for loads < 50 mA

Scheduled outputs

Synchronization within 16.7 s max, reference to the Coordinated System Time

States in Fault mode per point

Hold last state, On or Off (Off is default)

Isolation voltage

250V (continuous), basic insulation type, outputs to backplane, and group to group

Inhibit voltage, max

Zero crossing 60V peak

Technical documents (1)

• Rockwell Automation technical data 1756-TD002

Key features

• 16 outputs in groups of 8 points
• One fuse and indicator per group
• Electronic keying, software configurable
• Hold last state, on or off in fault mode
• Time stamp of diagnostics within ±1 ms

About the Allen-Bradley 1756-OA16

The 1756-OA16 is a ControlLogix 16 point AC output module (74-265 VAC Output 16 Pts, 20 pin). It works from 74…265V AC at 47…63 Hz, with a maximum of 0.5 A per point, 2 A per group and 4 A per module at 60 °C (140 °F). Each group is mechanically fused with a 3.15 A, 250V AC slow blow fuse, Littelfuse p/n H2153.15.

What is the 1756-OA16 used for?

It switches 120/240V AC 50/60 Hz loads, such as contactors and solenoids, from a ControlLogix controller on 16 output points. Scheduled outputs synchronise to the Coordinated System Time. In fault mode each point can hold its last state or go On or Off, with Off as the default.

Lifecycle and successor

Active (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 1756-OA16, 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.