1756-OA8 Allen Bradley Rockwell Digital AC Output Module

Product parameters

Product Model: 1756-OA8

Type: Digital AC Output Module (AC Digital Output)

Output points: 8, divided into 2 groups (4 points in each group)

Output voltage range: 74-265V AC, 47-63 Hz

Nominal voltage: 120/240V AC

Output current:

Each point: 2 A @ 60°C (linear derating)

Each group: 5 A @ 30°C, 4 A @ 60°C

Total module: 5 A @ 30°C, 4 A @ 60°C

Surge current: 20 A per point, lasting for 43 ms (repeatable every 2 seconds, @60 °C)

Minimum load current: 10 mA per point

Maximum off-state leakage current: 3 mA per point

Voltage drop in the conduction state: 1.5V AC @ 2 A

Power dissipation: Maximum 5.1W at 60°C

Heat dissipation: 17.39 BTU/hr at 60°C

Isolation voltage:

Channel to backplane: 250V (continuous), basically insulated, test voltage 1350V AC, lasting for 2 seconds

Inter-group isolation: 250V (continuous), test voltage 1350V AC, for 2 seconds

Wire size:

1756-TBNH: 0.33-2.1 mm² (22-14 AWG, single line), 0.33-1.3 mm² (22-16 AWG, Double line)

1756-TBSH: 0.33-1.3 mm² (22-16 AWG, single line)

Connector: 20-pin removable terminal block (RTB, such as 1756-TBNH or 1756-TBSH)

Operating temperature range: 0-60°C (32-140°F)

Storage temperature range: -40 to 85°C (-40 to 185°F)

Working humidity: 5-95% (no condensation)

Impact rating: 30G

Vibration level: 2G @ 10-500 Hz

Installation method: Install on ControlLogix racks (compatible with 1756-A4, A7, A10, A13, A17)

Certifications: CE, CSA, UL, FM, IECEx, ATEX, RCM, KC, EAC (as of March 2025)

Temperature code: T4 (North American and ATEX standards)

Shell type: Open Enclosure

UPC: 10612598171382

GTIN: 010612598171382

Function

Ac digital output

It provides 8 AC output channels (2 groups, 4 points in each group), supporting 74-265V AC, and is suitable for controlling AC loads such as relays, indicator lights, solenoid valves or motor starters.

Each point supports A current of 2 A (60°C), and the total current of the module can be up to 5 A (30°C) or 4 A (60°C).

Flexible status control

Supports Fault Mode and Program Mode at each point, which can be configured to remain in the final state (ON or OFF) to enhance system flexibility.

Support Scheduled Outputs with a synchronization time of up to 16.7 seconds to ensure precise control.

Diagnosis and Monitoring

Provide LED indications for output status, communication status and module health status to facilitate on-site diagnosis.

Supports point-level output fault status detection and is suitable for applications that require high reliability.

Network integration

Communicate with the ControlLogix controller via ControlNet or EtherNet/IP network, supporting local or distributed I/O architecture.

Supports hot plugging (RIUP), which is convenient for maintenance and replacement.

Software configuration:

Configured using Studio 5000 software, it supports point-level configuration, output status Settings, and communication formats (such as direct connection or rack optimization).

Support Add-On Profiles (AOP) for simplified configuration.

No internal fuse:

The module does not have an internal fuse. It is recommended to install an external fuse to protect the module. The size of the fuse should be selected based on a current of 2A at each point.

Application scenarios

Industrial automation control

It is used to control AC equipment in the production line, such as solenoid valves, relays, indicator lights, alarms or small motor starters.

Suitable for manufacturing, automotive assembly, packaging or material handling systems.

Process control

In the petrochemical, power or water treatment industries, drive AC loads such as pumps, valves or alarm devices.

High inrush current support (20 A, 43 ms) is suitable for starting high-impact loads.

Distributed control system

It can be integrated into large-scale factory automation systems as a remote I/O component through ControlNet or EtherNet/IP networks, and is suitable for cross-regional control.

Cost-sensitive scenarios:

Compared with the 1756-OA16 with a higher number of channels, the 1756-OA8 is suitable for small-scale I/O requirements and offers cost-effectiveness.

The design between non-isolated groups is suitable for applications with common ground signals and reduces the complexity of the system.

General AC load control: Suitable for controlling alarms, buzzers, indicator lights or contactors, widely used in factory automation and equipment control.

Advantage Products:

All items are Distributor Ready-stock Genuine Brand-new Supplying, please inform us if the other conditions are needed, Used, Open-box, Refurbished, etc.

Many Available just wait for you, feel free to ask to get better deal!!!

Bou L(Sales Manager)            

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