1756-OA8D Allen Bradley Rockwell Digital AC Output Module

Product parameters

Product Model: 1756-OA8D

Type: Diagnostic AC Digital Output Module

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

Output voltage range: 74-132V AC, 47-63 Hz

Nominal voltage: 120V AC

Module total: 8 A @ 30°C, 4 A @ 60°C (linear derating)

Surge current: 8 A per point, lasting for 43 ms (repeatable every 2 seconds, @30 °C)

Minimum load current: 10 mA per point

Maximum off-state leakage current: 3 mA per point

Voltage drop in the conduction state: Up to 3.0V AC@1 A

Power dissipation: Maximum 5.3W at 60°C

Heat dissipation: 18.0 BTU/hr at 60°C

Output delay time:

OFF to ON: 9.3 ms @ 60 Hz, 11 ms @ 50 Hz

ON to OFF: 9.3 ms @ 60 Hz, 11 ms @ 50 Hz

Isolation voltage:

Channel to backplane: 125V (continuous), basically insulated, test voltage 1200V AC, lasting for 2 seconds

Inter-group isolation: 125V (continuous), basic insulation, test voltage 1200V AC, lasting for 2 seconds

There is no isolation between channels (within the same group)

Diagnostic function:

Open circuit/load loss detection

Output verification detection

Point-level short circuit/overload detection

Fuse status detection (Electronic fuse)

Electronic fuse

Each point has an independent electronic fuse and automatically resets (can be configured through software)

Trigger current: 2.5A (typical value)

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: T4A (North America), T4 (ATEX and IEC)

Shell type: Open Enclosure

UPC: 10612598164520

Function

Diagnostic AC output

It provides 8 AC output channels (2 groups, 4 points in each group), supporting 74-132V AC, and is suitable for controlling AC loads such as relays, solenoid valves, indicator lights or motor starters.

Each point supports 1 A (30°C) or 0.5 A (60°C), and the total module current can be up to 8 A (30°C) or 4 A (60°C).

Electronic fuse protection

Each point is equipped with an independent electronic fuse. Once triggered, it automatically protects to reduce the risk of overload or short circuit.

The circuit breaker status can be monitored and reset through the software (Studio 5000) without the need for physical replacement.

Advanced diagnostic functions:

Supports open circuit/load loss detection, output verification detection, short circuit/overload detection and fuse status report.

It provides point-level fault status and is suitable for scenarios that require high reliability and rapid fault location.

The LED indicator light shows the output status, communication status, module health status and fuse status.

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).

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

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, diagnostic Settings, and communication formats (such as direct connection, rack optimization, and scheduling output).

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

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.

Diagnostic functions and electronic fuse protection reduce downtime and are suitable for critical processes.

Distributed control system: Through ControlNet or EtherNet/IP networks, it serves as a remote I/O component and is integrated into large-scale factory automation systems, suitable for cross-regional control.

High-reliability scenarios:

Diagnostic functions (open circuit, short circuit, and load loss detection) are suitable for scenarios that require rapid fault location, such as critical infrastructure or continuous production processes.

Electronic fuse protection enhances system reliability and reduces maintenance costs.

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

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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Tina(Sales Specialist)       

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Doris(Sales Specialist)       

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