The Allen-Bradley 1756-OA16I functions as a high-density discrete output solution for ControlLogix platforms. This module features sixteen independent channels to manage AC-powered field devices. It operates effectively across a broad voltage range of 75V to 265V AC. Furthermore, the 1756-OA16I provides individual channel isolation for superior signal integrity. This design prevents electrical noise from affecting adjacent circuits in complex automation systems.
This module supports versatile installation in both local and remote chassis configurations. System designers often utilize the 1756-OA16I to drive motors, valves, and actuators. It integrates seamlessly with standard ControlLogix processors for real-time logic execution. Moreover, the hardware allows users to define specific fault-state behaviors for every output point. This capability ensures the system remains safe during communication loss or processor failures.
Essential Technical Specifications
- Manufacturer: Allen-Bradley / Rockwell Automation
- Model Number: 1756-OA16I
- Product Line: ControlLogix
- Output Type: Isolated AC Digital Output
- Number of Channels: 16 Points
- Voltage Range: 75V to 265V AC (47–63 Hz)
- Backplane Current: 300mA @ 5.1V DC; 2.5mA @ 24V DC
- Maximum Current per Point: 2A @ 30°C (60W)
- Inrush Current: 20A for 43ms per point
- Isolation Voltage: 250V (Continuous)
- Power Dissipation: 5.5 Watts
- Thermal Dissipation: 18.76 BTU/hr
- Operating Temperature: 0°C to 60°C (32°F to 140°F)
Hardware Integration and Configuration
The 1756-OA16I requires a Removable Terminal Block (RTB) to connect field wiring. Compatible models include the 1756-TBCH and the 1756-TBS6H spring-clamp versions. These blocks allow technicians to replace modules without disconnecting field wires. Additionally, the single-slot design fits all standard 1756-A series chassis. This compatibility simplifies hardware scaling for growing industrial networks.
The module provides deterministic timing for critical switching applications. Switching delays remain consistent at 11ms for 50Hz networks and 9.3ms for 60Hz. Furthermore, the unit features rugged construction to withstand industrial environments. It handles physical shocks up to 30G during operation. These characteristics ensure long-term reliability in manufacturing and process control sectors.
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