Is Your ControlLogix Panel Ready for a High-Density AC Output Upgrade?
When a production line stalls because an aging output card cannot drive enough AC field devices, every hour of downtime cuts into throughput. The Allen-Bradley 1756-OA16 answers that challenge directly: a ControlLogix digital AC output module with sixteen mechanically fused points, built for 74-265 VAC field power.
What the 1756-OA16 Delivers
The 1756-OA16 is a 16-point digital AC output module from the Allen-Bradley ControlLogix series. It installs directly into a 1756 local or remote chassis and switches AC loads across a wide 74-265 VAC operating range at 47-63 Hz. Sixteen outputs split into two groups of eight, each group mechanically fused, so a fault on one channel does not take down the entire card.
Key Parameters That Matter on the Floor
| Specification | Value |
|---|---|
| Outputs | 16 mechanically fused points |
| Operating voltage range | 74-265 VAC |
| Voltage category | 120 / 240 VAC |
| Current per point | 0.5 A @ 60 °C |
| Current per module | 4 A @ 60 °C |
| Backplane current | 400 mA @ 5 V; 2 mA @ 24 V |
| Isolation voltage | 50 V continuous |
| Power dissipation (max) | 6.5 W @ 60 °C |
| Operating temperature | 32-140 °F |
With 0.5 A per point and 4 A per module, the 1756-OA16 comfortably drives pilot-duty loads such as solenoid valves, cylinders, and relays. Programmable output delay times of 9.3 ms (off-to-on at 60 Hz) and 11 ms (on-to-off at 50 Hz) give engineers predictable timing for sequencing logic.
Where This Module Fits
Oil and gas facilities often run AC pilot devices across long cable runs. The 74-265 VAC range and 50 V continuous isolation help the 1756-OA16 handle those field conditions. Water treatment plants use the fused group architecture to isolate faults without shutting down an entire process train. Packaging and material handling lines rely on the sixteen points to consolidate control of motors, indicators, and valve banks into one chassis slot.
Installation and Chassis Compatibility
The 1756-OA16 mounts in any compatible ControlLogix chassis, including the 1756-A4, 1756-A7, 1756-A10, 1756-A13, and 1756-A17. It works in local chassis alongside the processor or in remote I/O chassis connected through a communication module. Removable terminal blocks 1756-TBNH and 1756-TBSH serve as the field wiring termination points. Front-panel LEDs confirm per-channel status, and the module reports fuse and field power faults through the FuseBlown and FieldPwrLoss tags.
If your application drives high-inrush inductive loads, add an interposing circuit to protect the output stage.
Sourcing and Availability
ControlLogix systems stay in service for decades, so finding a reliable 1756-OA16 when you need it matters. Oil AutoTech specializes in fast-dispatch spares for oil, gas, and industrial automation, with hands-on help selecting the right terminal blocks and chassis configuration. Please verify current lifecycle status and availability with Oil AutoTech before ordering.
Contact Oil AutoTech today for pricing and availability.
