Allen-Bradley 1769-OA8 CompactLogix 8Ch AC Output Module

Product Overview

The Allen-Bradley 1769-OA8 is a Compact I/O digital output module designed for CompactLogix and MicroLogix 1500 systems. It provides eight independently controlled AC switching channels, enabling direct operation of field devices such as relays, solenoids, indicator lamps, and contactors in industrial control environments.

Each output is triac-based, supporting reliable AC load switching with high electrical durability and minimal maintenance requirements. The module is engineered for compact installations where space efficiency and multi-channel AC control are required.

Output Performance & Electrical Characteristics

• Number of Outputs: 8 channels (2 groups of 4)

• Output Type: Triac, AC sourcing output

• Voltage Range:

• 85–132V AC (120V nominal class)

• 170–265V AC (240V nominal class)

• Frequency Range: 47–63 Hz

• Current Rating:

• 1.0 A per channel @ 30°C

• 0.5 A per channel @ 60°C

• Total Module Current: 8 A maximum combined

• Surge Capacity: 10 A for 10 ms

• Leakage Current (OFF state): < 2 mA

• Voltage Drop (ON state): < 1.5V AC

• Switching Time:

• ON: ~1 ms

• OFF: ~11 ms

• Minimum Load Requirement: 50 mA

Backplane & Power Requirements

• Backplane Voltage: 5V DC

• Current Draw: ~110–145 mA (depending on system configuration)

• Power Dissipation: ~3.4 W

• External Fuse: Recommended for load protection (not internally fused)

• Compatible Power Supplies: 1769-PA2, PB2, PA4, PB4

System Integration

• Supported Controllers:

• CompactLogix L2x / L3x series

• MicroLogix 1500

• Platform: Allen-Bradley Compact I/O (1769)

• Slot Compatibility: 1769 CompactLogix chassis

• Mounting Options: DIN rail or panel-mounted base system

• Output Grouping: Two isolated output groups (4 channels each)

Environmental & Mechanical Specifications

• Operating Temperature: 0°C to 60°C

• Storage Temperature: -40°C to 85°C

• Humidity: 5–95% non-condensing

• Shock Rating: 30 g operating

• Vibration: 5 g (10–150 Hz)

• Wiring Range:

• Solid: 22–14 AWG

• Stranded: 22–16 AWG

• Heat Dissipation: ~2.1–3.4 W depending on load

• Weight: 0.44 lb

Engineering Features

• Eight-channel AC triac output switching architecture

• Designed for high-reliability inductive load control

• Dual-group output isolation structure for improved load segmentation

• Compact form factor optimized for machine-level control systems

• Compatible with standard CompactLogix and MicroLogix platforms

• Stable switching performance under industrial AC load conditions

Typical Applications

• Solenoid and valve actuation systems

• Motor starter and contactor control

• Industrial lighting and signaling circuits

• Packaging and material handling equipment

• Machine automation control panels

• General-purpose AC load switching systems

FAQ

Q1: Can this module drive inductive loads directly?
Yes, it is designed for AC inductive loads such as relays and solenoids, but external surge protection is recommended.

Q2: Does it require external fusing?
Yes, external fusing is recommended since internal fusing is not provided.

Q3: How are the outputs grouped?
The module has two groups of four channels, allowing partial isolation of output loads.

Q4: Is it compatible with MicroLogix systems?
Yes, it supports MicroLogix 1500 as well as CompactLogix controllers.