Allen-Bradley 1756-OA16 | ControlLogix Digital AC Output Module

Overview

The Allen-Bradley 1756-OA16 is a high-performance ControlLogix digital AC output module. It delivers sixteen fused output points organized into two groups of eight channels each. This design provides reliable switching performance across a wide voltage range from 74 to 265 Volts AC at frequencies between 47 and 63 Hertz.

Electrical Ratings

Each output point of the 1756-OA16 supports a maximum current of 0.5 Amps at 60 °C, while each group handles 2 Amps, and the entire module manages 4 Amps. The maximum on-state voltage drop measures 1.5 Volts at 0.5 Amps, whereas low current loads below 50 mA result in a 5.7 Volt drop. Off-state leakage current per channel does not exceed 3 mA.

Performance and Timing

The 1756-OA16 offers programmable output delays. The off-to-on transition occurs within 9.3 milliseconds at 60 Hertz, while the on-to-off delay is 11 milliseconds at 50 Hertz. The module features diagnostic indicators such as FuseBlown for channel protection and FieldPwrLoss to signal loss of field power.

Power and Thermal Data

Backplane current consumption is 400 mA at 5.1 Volts DC and 2 mA at 24 Volts DC, with a total backplane power dissipation of 2.1 Watts. Maximum power dissipation reaches 6.5 Watts at 60 °C, corresponding to a thermal dissipation of 22.17 BTU per hour.

Mechanical and Environmental Specs

The 1756-OA16 supports removable terminal blocks, including 1756-TBNH, 1756-TBCH, and 1756-TBSH, which simplify installation and replacement. It operates within 32 to 140 °F and can be stored from -40 to 185 °F. The module withstands 5–95% non-condensing relative humidity, ensuring dependable performance in industrial environments.