Configured for AC output actuation in FLEX I/O systems, the Allen Bradley 1794‑OA16 (1794‑OA16 digital output module) provides direct electrical switching across sixteen nonisolated output points within approved terminal base assemblies.
Hardware Specifications
Parameter
Specification
Model
1794‑OA16
Brand
Allen Bradley
Origin
USA
Weight
Not specified
Dimensions
Not specified
Operating Temp
0 to 55 deg C (surrounding air)
Power Consumption
Max 4.7 W @ 0.5 A
Core Performance Indicators
16 AC outputs, 74–132 VAC output range, 250 mA per point (4.0 A total), 7 A surge capability, 1.5 V drop @ 0.5 A, 80 mA Flexbus current, basic insulation field‑to‑backplane
Backplane Bus Communication Velocity & I/O Density Scaling
Within FLEX I/O architectures, the 1794‑OA16 participates in deterministic backplane bus communication velocity governed by the Flexbus interface. The module’s 80 mA backplane draw and nonisolated output structure allow predictable I/O density scaling when combined with other FLEX modules. Output propagation timing remains consistent across high‑channel‑count racks, ensuring stable scan cycles under mixed AC and DC module configurations. Firmware flash compatibility is maintained across standard FLEX adapters without requiring module‑specific revisions.
Frequently Asked Questions
Q: Can the 1794‑OA16 be mounted on any FLEX terminal base A: It must be installed on approved bases: 1794‑TBN, 1794‑TBNF, 1794‑TB2, 1794‑TB3, 1794‑TB3S, 1794‑TBKD, 1794‑TBNK, 1794‑TBNFK, 1794‑TB3K, or 1794‑TB3SK.
Q: Are individual output channels isolated A: No. Channels are nonisolated; isolation exists only between field side and backplane.
Q: What is the maximum surge current capability A: 7 A for 40 ms, repeatable every 8 seconds.
Field Installation Guidelines
Alternate wiring when using 0.5 A loads to avoid adjacent high‑current outputs. Maintain separation between AC output conductors and low‑level signal wiring. Verify terminal base screws are tightened according to base specifications. Ensure environmental conditions meet vibration, shock, humidity, and contamination limits before commissioning. Avoid routing AC conductors near high‑frequency drives to reduce induced oscillation on output waveforms.
