Allen-Bradley 1756-OA8D ControlLogix Output Module

The Allen-Bradley 1756-OA8D ControlLogix Output Module is an eight-point diagnostic digital output module for ControlLogix backplanes that switches 74–132 VAC loads (47–63 Hz). Each output is electronically fused and rated for up to 1 A per point, with 8 A total per module and a total backplane power of about 6.89 W, supported by a maximum power dissipation of 5.3 W at 60 °C. It provides per-point diagnostics and 125 V isolation between outputs and the backplane, with timing characteristics such as 9.3 ms OFF-to-ON at 60 Hz and 11 ms at 50 Hz, making it suitable for driving relays, contactors, or other AC-powered devices in industrial automation; the module uses a removable terminal block (1756-TBNH or 1756-TBSH) and is configurable to meet specific wiring and fault-handling needs.