Product Overview

The Allen-Bradley 1756-OA16IK is an isolated AC output module for ControlLogix systems. This module has 16 output points. Each output is individually isolated. The operating voltage range is 74 to 265V AC. The module has a conformal coating for harsh environments. It uses a 36-pin removable terminal block. This module suits applications needing high voltage AC output control.

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Part Number Breakdown (Tree Structure)

• 1756 → Series Family
  • ControlLogix platform
  • Allen-Bradley / Rockwell Automation
• OA → Product Type
  • AC Output module
• 16 → Channel Count
  • 16 output points
• IK → Special Features
  • Individually isolated outputs
  • Conformal coated

Key Specifications

• Brand: Allen-Bradley / Rockwell Automation
• Part Number: Allen-Bradley 1756-OA16IK
• Series: ControlLogix
• Module Type: Isolated AC Output Module
• Number of Outputs: 16 points, individually isolated
• Nominal Voltage: 120 to 240 Volts AC
• Operating Voltage Range: 74 to 265 Volts AC
• Enclosure Type: None (open-style)

Output Current Ratings

Per Point (Individual Output):

• At 30°C: 2 Amps maximum
• At 60°C: 1 Amp maximum

Per Module (Total):

• At 30°C: 5 Amps maximum
• At 60°C: 4 Amps maximum

Power Specifications

• Maximum Power Dissipation (at 60°C): 5.5 Watts
• Backplane Current (5 Volts): 300 milliamps (0.3 A)
• Backplane Current (24 Volts): 3 milliamps (0.003 A)

Isolation Features

• Isolation Type: Each output individually isolated
• Isolation Voltage: 50 Volts continuous
• Individual isolation prevents cross-channel faults.
• One output failure does not affect others.

Conformal Coating

• The module has a conformal coating on all components.
• Coating protects against moisture and corrosive gases.
• It prevents dust and chemical damage.
• Suitable for harsh industrial environments.
• Ideal for offshore, chemical, and outdoor use.

Compatible Removable Terminal Blocks

• 1756-TBCH
• 1756-TBS6H
• 36-pin connector type
• Removable design allows easy wiring and replacement.

Installation Guide

• Turn off all power before installation.
• Insert the Allen-Bradley 1756-OA16IK into any ControlLogix chassis slot.
• Press firmly until the module seats in the backplane.
• Secure the module with retaining screws.
• Attach the removable terminal block (1756-TBCH or 1756-TBS6H).
• Connect AC loads to the 16 output terminals.
• Do not exceed 2 Amps per output at 30°C.
• Do not exceed 5 Amps total module current at 30°C.
• Apply power and check output status LEDs.
• Test each output with a known load.

Derating Information

• Current rating decreases as temperature rises.
• At 30°C: 2 Amps per point, 5 Amps per module.
• At 60°C: 1 Amp per point, 4 Amps per module.
• Use proper ventilation for high-temperature operation.
• Reduce load current in hot environments.

Maintenance Tips

• Check LED indicators for each output channel.
• Inspect terminal block for loose connections.
• Monitor module temperature during operation.
• Keep conformal coating intact for protection.
• Do not use solvents that remove the coating.
• Replace module if multiple outputs fail.

Troubleshooting Tips

• If output does not turn on, check field wiring.
• Verify AC voltage is within 74-265V range.
• Check load current does not exceed 2 Amps.
• If multiple outputs fail, check total module current.
• Use 1756-TBCH or 1756-TBS6H terminal blocks only.
• Check backplane power connections.

Typical Applications

• Motor starter and contactor control
• Solenoid valve actuation (AC coils)
• Indicator lamp control for AC systems
• HVAC equipment control
• Pump and fan control panels
• Lighting control for industrial facilities
• Process control with AC actuators

Package Contents

• One Allen-Bradley 1756-OA16IK isolated AC output module
• One product label
• Terminal block not included (order 1756-TBCH or 1756-TBS6H separately)

Warranty and Shipping

• 12 months factory warranty from shipment date.
• Warranty covers manufacturing defects only.
• Overcurrent or wrong voltage voids the warranty.
• Shipping options: FedEx, UPS, DHL.
• Tracking number provided after shipment.

Frequently Asked Questions (FAQ)

Q1: How many outputs does the 1756-OA16IK have?

The Allen-Bradley 1756-OA16IK has 16 output points. Each output is individually isolated. This prevents cross-channel faults and improves system reliability.

Q2: What voltage range does this module support?

Nominal voltage is 120 to 240 VAC. Operating range is 74 to 265 VAC. This supports most industrial AC control systems worldwide.

Q3: What is the maximum current per output?

At 30°C, each output handles 2 Amps maximum. At 60°C, each output handles 1 Amp maximum. Total module current is 5 Amps at 30°C and 4 Amps at 60°C.

Q4: Does the 1756-OA16IK have conformal coating?

Yes, this module has conformal coating. The coating protects against moisture, corrosive gases, and dust. Use it in harsh environments like chemical plants or offshore platforms.

Q5: What terminal blocks work with this module?

Use 1756-TBCH or 1756-TBS6H removable terminal blocks. These are 36-pin types. Order them separately if you need spare terminal blocks.

Buying Guide

When you buy a Allen-Bradley 1756-OA16IK output module, follow these tips. First, count your AC output needs. This module gives 16 outputs. Second, verify your voltage range. This module works from 74 to 265 VAC. Third, check your load current per output. At 30°C, do not exceed 2 Amps. Fourth, calculate your total module current. Do not exceed 5 Amps at 30°C. Fifth, consider your operating temperature. Derate current at higher temperatures. Sixth, order compatible terminal blocks. Use 1756-TBCH or 1756-TBS6H. Seventh, verify your environment needs. Conformal coating suits harsh conditions. Eighth, check your chassis compatibility. Use any ControlLogix chassis. Ninth, review warranty terms. We offer 12 months coverage. Tenth, choose your shipping method. We use FedEx, UPS, and DHL. Finally, test each output with a dummy load before connecting field devices.

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