AB 1756-OA16I ControlLogix AC Digital Output Module

Allen-Bradley 1756-OA16I ControlLogix AC Digital Output Module Overview

The Allen-Bradley 1756-OA16I is a 16-point, individually isolated AC digital output module for the Rockwell Automation ControlLogix platform. It is designed to provide robust and reliable control of various AC loads in industrial automation systems, offering individual isolation for enhanced fault tolerance and flexibility.

Product Detailed Description

• Functionality:

• Provides 16 discrete digital output points, each capable of switching an AC load.

• Converts digital signals from the ControlLogix processor into AC voltage signals to control external devices such as contactors, motor starters, solenoids, indicator lights, and small motors.

• Each output point is individually isolated, meaning that a fault or short circuit on one output will not affect other outputs or the ControlLogix backplane, enhancing system reliability and uptime.

• Supports a wide operating voltage range, making it versatile for various AC control applications.

• Features:

• 16 Individually Isolated Outputs: Provides maximum independence and fault tolerance for each output point.

• Wide Voltage Range: Operates with an AC voltage range of 74-265V AC, 47-63 Hz, suitable for 120V AC and 240V AC applications.

• High Current Output: Each point can handle up to 1.0 A continuous output current.

• Pilot Duty Rated: Suitable for controlling inductive loads like motor starter coils.

• Removable Terminal Block (RTB) Compatibility: Uses either the 1756-TBCH or 1756-TBS6H RTBs for easy wiring and maintenance without removing power or disturbing other connections.

• ControlLogix Platform Integration: Seamlessly integrates into the ControlLogix chassis and works with ControlLogix processors, leveraging the platform's high performance and advanced features.

• Diagnostic Capabilities: Provides diagnostics for output status, aiding in troubleshooting.

• Robust Industrial Design: Built to withstand harsh industrial environments, including temperature variations, vibration, and electrical noise.

Product Parameters

• Outputs: 16 individually isolated digital AC outputs

• Voltage Category: 120/240V AC 50/60 Hz

• Operating Voltage Range: 74…265V AC, 47…63 Hz

• Output Current (per point): 1.0 A (continuous)

• Inrush Current: 10 A for 10 ms (non-repetitive)

• Leakage Current (max): 2.5 mA per point (off-state)

• 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: 250V continuous between outputs, and between outputs and backplane.

• Removable Terminal Block (RTB): Requires 1756-TBCH or 1756-TBS6H

• Backplane Current (max):

• 5.1V DC: 175 mA

• 24V DC: 2 mA

• Power Dissipation (max): 7.6 W

• Thermal Dissipation (max): 25.9 BTU/hr

• Operating Temperature: 0…60 °C (32…140 °F)

• Storage Temperature: -40…85 °C (-40…185 °F)

• Humidity: 5…95% non-condensing

• Vibration: 10…500 Hz, 2g

• Shock: 30g (operating), 50g (non-operating)

• Certifications: UL Listed, c-UL, CE, C-Tick, EAC (may vary by specific revision)

Product Advantages

• High Reliability and Uptime: Individual output isolation prevents single-point failures from affecting other outputs, enhancing overall system reliability and reducing downtime.

• Versatile Application: Wide voltage range and pilot duty rating make it suitable for a broad array of AC control devices.

• Simplified Maintenance: Removable Terminal Blocks (RTBs) allow for quick module replacement without re-wiring, minimizing maintenance time.

• Enhanced Diagnostics: Per-point diagnostics help in quickly identifying and resolving issues, speeding up troubleshooting.

• Seamless Integration: As part of the ControlLogix family, it benefits from the platform's unified programming environment (Studio 5000 Logix Designer) and advanced control capabilities.

• Robustness: Designed for demanding industrial environments, ensuring long operational life and stable performance.

Precautions

• Proper RTB Selection: Ensure the correct Removable Terminal Block (1756-TBCH or 1756-TBS6H) is used for proper module operation and wiring.

• Voltage and Current Ratings: Do not exceed the specified operating voltage range (74-265V AC) or the maximum current per point (1.0 A).

• Load Type: While pilot duty rated, always verify the compatibility of the load with the module's output specifications, especially for highly inductive loads.

• Wiring Practices: Follow good wiring practices, including proper wire sizing, insulation, and grounding, to minimize electrical noise and ensure safety.

• Environmental Conditions: Operate the module within its specified temperature and humidity ranges. Ensure adequate ventilation in the control cabinet to prevent overheating.

• Firmware Compatibility: Ensure the firmware version of the ControlLogix processor is compatible with the module's firmware.

• Safety Interlocks: Always implement appropriate safety interlocks and protective devices external to the PLC logic, especially for critical applications.

• Power Isolation: Ensure power to the module and controlled loads is de-energized before performing any wiring or maintenance.

Product Applications

The Allen-Bradley 1756-OA16I module is widely used in various industrial automation applications where robust and individually isolated AC digital outputs are required:

• Motor Control Centers (MCCs): Controlling motor starters, contactors, and small AC motors.

• Packaging Machinery: Actuating solenoids, grippers, and indicator lights for various packaging operations.

• Process Control: Controlling solenoid valves, alarms, and pump starts/stops in chemical, oil & gas, and water treatment plants.

• Material Handling Systems: Operating conveyors, lifts, and sorting mechanisms.

• HVAC Systems: Controlling fans, dampers, and other AC-powered components in large building management systems.

• Manufacturing Assembly Lines: Automating various steps by controlling pneumatic/hydraulic valves, clamps, and indicators.

• Lighting Control: Switching industrial lighting systems.

• Batch Processing: Controlling sequencing and timing of various AC-powered devices in batch control applications.

Shipping Port: Xiamen, China

Payment: Bank of Chicago, Bank of Singapor

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