Allen-Bradley 1756-OA8 Digital AC Output Module 8 Points

Product Overview

The Allen-Bradley 1756-OA8 is a digital AC output module. It belongs to the ControlLogix series. This module gives you eight independent output points. Each point can switch 120/240 Volts AC. The operating voltage range is 74 to 265 Volts AC. It supports frequencies from 47 to 63 Hz. This module is ideal for industrial automation tasks. It handles high inrush currents well. The surge rating is 20 Amps per point for 43 milliseconds. This makes it reliable for demanding loads. You can program the output delay time. Choose between 9.3 or 11 milliseconds. The module uses a single slot in the chassis. It requires a removable terminal block. Supported blocks include 1756-TBNH, 1756-TBSH, and 1756-TBCH. The 1756-OA8 is built for harsh environments. It offers excellent electrical isolation. The continuous isolation voltage is 50 Volts. This protects your system from noise and faults.

Application Scenarios

Use the 1756-OA8 for switching AC loads. It works well with motors, solenoids, and valves. It is perfect for conveyor systems. It can control lighting and heaters. Use it in packaging machines. It fits in material handling systems. It works in process control applications. The module is suitable for factory automation. It can drive contactors and relays. You can use it in any ControlLogix chassis. It handles both new and retrofit projects. Its high surge rating makes it good for lamp loads. The programmable delay helps with timing sequences. This module is a standard choice for AC output control.

Technical Specifications

This module has eight output points. The voltage category is 120/240 Volts AC. The operating voltage range is 74-265 Volts AC. The frequency range is 47 to 63 Hz. The maximum output current per point is 2 Amps at 60 degrees Celsius. The maximum current per module is 5 Amps at 30 degrees Celsius. It derates linearly to 4 Amps at 60 degrees Celsius. The current per group is 2 Amps at 60 degrees Celsius. The backplane current draw is 200 mA at 5 Volts. It also draws 2 mA at 24 Volts. The maximum power dissipation is 5.1 Watts at 60 degrees Celsius. Thermal dissipation is 17.39 BTU per hour. The slot width is 1. The minimum load current per point is 10 milliamps. The maximum leakage current in off-state is 3 milliamps per point. The module synchronizes within 16.7 seconds for scheduled outputs. In fault or program mode, each point holds its last state.

Installation & Maintenance Guide

Install the 1756-OA8 into any ControlLogix slot. Ensure the chassis power is off. Slide the module into the guided rails. Press firmly until it locks. Attach a compatible terminal block. Wire your AC loads to the block. Follow local electrical codes. Use proper wire sizes for your current. The module does not require an external enclosure. It is open-style. Check connections periodically. Keep the module clean and dry. Do not expose it to excessive vibration. The module has no user-serviceable parts. Replace it if it fails. Use only Allen-Bradley approved accessories. For best performance, stay within the derating curves. This ensures long life and reliable operation.

Packing List

Each order includes one Allen-Bradley 1756-OA8 module. It does not include a terminal block. You must order the block separately. Supported blocks are 1756-TBNH, 1756-TBSH, or 1756-TBCH. The module comes in anti-static packaging. It includes a quick-start guide. No other accessories are included. We ship via Fedex, UPS, or DHL. Our shipping is fast and reliable.