Allen-Bradley 1756-OA8 ControlLogix AC Output Module

Allen-Bradley 1756-OA8 ControlLogix AC Output Module – 8-Channel High Voltage Control

Industrial-Grade AC Switching

The 1756-OA8 delivers 8 AC outputs for heavy-duty applications. Handles 74-265V AC loads with 2A per point capacity. Ideal for motors, contactors, and industrial lighting.

Key Advantages

• 8 outputs in 2 isolated groups (4 outputs/group)
• Wide voltage range: 74-265V AC (47-63Hz)
• High current: 2A per point at 60°C
• Fast switching: 9.3ms response at 60Hz
• Works with 1756-TBNH/TBSH terminal blocks

Technical Specifications

• Brand: Allen-Bradley
• Model: 1756-OA8 (Full suffix: 1756-OA8/B)
• Voltage Range: 74-265V AC (120/240V typical)
• Surge Capacity: 20A for 43ms (repeatable)
• Isolation: 50V continuous between groups
• Power Use: 200mA at 5V DC backplane
• Wire Size: 22-14 AWG recommended

System Integration

• Fits all 1756 ControlLogix chassis (A4, A7, A10, etc.)
• Works with GuardLogix safety systems
• Supports local and remote I/O configurations

Service Commitment

• 12-month performance guarantee
• Express shipping via FedEx, UPS, DHL

Expert Answers

• Q: Can I mix 120V and 240V on this module?
  A: Yes! The two groups are fully isolated.
• Q: What’s the minimum load requirement?
  A: Needs at least 10mA per output.
• Q: Does this module include fuses?
  A: No – external fusing required.
• Q: How many modules can I chain together?
  A: Limited by chassis slots and power supply.
• Q: Is this suitable for 3-phase systems?
  A: Only for single-phase control applications.

Need installation details? Download the complete 1756-OA8 manual here.