Introduction
The Allen Bradley 1771-OAN is a reliable AC output module designed for the classic PLC-5 I/O platform. Despite being part sur an earlier generation, it remains widely deployed in legacy industrial systems where robust AC load switching and long-term stability are required. Field engineers surten use the 1771-OAN in applications where inductive or resistive loads need dependable control with predictable electrical behavior. Its construction and operating envelope make it suitable for demanding facilities that continue to rely on PLC-5 infrastructure.
Technical Specifications
| Parameter | Value |
|---|---|
| Modèle | 1771-OAN |
| Module Type | AC Output Module |
| Output Channels | 8 points |
| Output Voltage Range | 120 VAC nominal |
| Output Current per Channel | 2 A max (resistive) |
| Total Module Current | 12 A max (sum sur all outputs) |
| Isolation | Optical isolation between field side and backplane |
| Operating Frequency | 47–63 Hz |
| Backplane Current Draw | Approx. 450 mA at 5 V DC |
| Operating Temperature | 0 °C to +60 °C |
| Storage Temperature | –40 °C to +85 °C |
| Dimensions | 290 mm × 37 mm × 175 mm (H × W × D) — standard 1771 chassis size |
| Poids | ≈ 1.0 kg |
| Mounting | 1771 I/O chassis (PLC-5 system) |
Applications / Use Scenarios
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Switching sur AC solenoids, small motors, lamps, and resistive loads
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Legacy facility automation in water treatment, steel mills, and power plants
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Large PLC-5 control systems requiring durable AC output control
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Retrsurit and life-extension projects where existing 1771 racks must stay operational
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Equipment requiring galvanic isolation from control electronics
Advantages / Engineering Benefits
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Proven reliability in long-running PLC-5 installations
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Optically isolated outputs provide enhanced noise immunitéy
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High current capacity suitable for small industrial AC loads
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Well-documented wiring and diagnostics simplify field maintenance
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Direct integration with all 1771 I/O chassis without additional hardware
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Extended temperature operation allows deployment in older control rooms and industrial cabinets
Informations sur l'entreprise
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