Allen Bradley 1794-OA16 16 Point Digital Output Module

Allen Bradley 1794-OA16 Digital Output Module

Configured for AC output actuation in FLEX I/O systems, the Allen Bradley 1794-OA16 (1794-OA16 digital output module) provides deterministic switching across sixteen non‑isolated output points. The module operates within the FLEX backplane and supports AC loads from 74 V AC to 132 V AC with defined surge and leakage characteristics.

Hardware Specifications

Profinet / EtherNet/IP Deterministic Networks

Within Allen Bradley architectures, the 1794-OA16 integrates into deterministic EtherNet/IP or ControlNet networks through the FLEX I/O adapter. Output commands propagate through fixed‑cycle backplane timing, ensuring predictable AC load switching. I/O density scaling allows high‑channel‑count output banks without firmware flash compatibility constraints. The module’s non‑isolated channels follow uniform propagation rules, and backplane communication velocity remains stable under full 16‑point loading.

Frequently Asked Questions

Q: Can the 1794-OA16 be hot‑swapped on a FLEX I/O base? A: FLEX I/O modules can be replaced only when the system is de‑energized; hot‑swap is not supported due to backplane power and signal continuity requirements.

Q: What terminal bases are compatible with the 1794-OA16? A: Supported bases include 1794‑TBN(5), TBNF, TB2, TB3, TB3S, TBKD, TBNK, TBNFK, TB3K, and TB3SK.

Q: How fast do the outputs switch? A: Both off‑to‑on and on‑to‑off transitions follow a maximum delay of 1/2 AC cycle.

Field Installation Guidelines

• Maintain proper torque on terminal base screws according to the installed base type.
• Route AC output wiring separately from low‑level analog circuits to reduce noise coupling.
• Ensure external AC supply remains within the 74–132 V AC range.
• Apply surge‑rated protective devices when switching inductive loads to manage the 7 A surge profile.
• Verify module seating by applying uniform pressure across the FLEX connector before energizing.