PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1771-OAN is a 32-channel digital AC output module for the PLC-5 system architecture. This high-density module operates across an AC voltage range of 85 to 264 VAC at 47 to 63 Hz. Internal circuits feature conformal coating for environmental protection in industrial control cabinets. The unit mounts directly into compatible 1771 I/O chassis assemblies using a field wiring arm.
Outputs are organized into four separate groups of eight channels each. Each channel provides 1.0 A continuous output current at 30 degrees Celsius. An internal replaceable fuse protects each eight-channel group from severe overcurrent conditions. Front-panel LED indicators display the active energization status of all 32 individual output channels. The module backplane logic consumes 800 mA of current at 5 VDC.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
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| Category | PLCs |
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| Product Line | PLC 5 |
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| UPC | 612598117277 |
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| Weight | 1.50 lbs (0.68 kg) |
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| Number of Outputs | 32 Outputs (4 sets of 8) |
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| Module Type | Digital AC Output Module |
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| No. of Outputs | 32 Outputs |
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| No. of Groups | Four (4) |
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| Channels per group | Eight (8) |
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| Max Continuous Current Per Output | 1.0 Amperes (at 30 C) and 0.3 Amperes (at 60 C) |
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| Voltage Category | 85-264 VAC |
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| AC Operating Voltage | 10 to 138 Volts AC |
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| Nominal Voltage | 120 / 240 VAC |
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| Coating | Conformal Coat |
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| Backplane Current | 800 mA |
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| Data Format | BDC or Natural Binary |
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| Max Continuous Current Per Point | 1A |
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| Typical AC Signal Delay (Off) | 45 (+/- 15) ms |
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| Max Current Per Module | 8A |
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| Typical DC Signal Delay (Off) | 50 ms |
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| Signal Delay (max.) Off to On | 1ms, max. |
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| Wiring Arm | 1771-WH |
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| Signal Delay (max.) On to Off | 9.3 ms @ 60Hz; 11 ms @ 50 Hz |
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| Mounting | Rack Mountable |
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TECHNICAL INFORMATION
Features
- Provides 32 discrete AC outputs arranged into four isolated groups of eight points.
- Delivers 1.0 A per channel at 30 °C and 0.3 A at 60 °C.
- Includes individual internal fuse protection for each eight-channel group.
- Features 32 front-panel status LEDs for direct channel diagnostic indication.
- Incorporates protective conformal coating across internal module circuitry.
- Supports both BCD and natural binary data formats in processor memory.
TECHNICAL INFORMATION
Applications
- Control of AC electrical loads across PLC-5 automated processing systems.
- High-density discrete AC switching requiring segmented group-level fuse protection.
- Industrial equipment automation in IEC/CISPR 11 Class 1, Class A environments.
TECHNICAL INFORMATION
Connections / Interfaces
- Plugs into standard 1771 I/O chassis backplane slots.
- Connects to field wiring through the 1771-WH or 1771-WN wiring arm.
- Organizes 32 field output channels across four segmented eight-point groups.
TECHNICAL INFORMATION
Installation Guidelines
- Install into 1771-A1B through 1771-A4B or later 1771 I/O chassis models.
- Ensure power supply sizing accommodates the 800 mA backplane draw at 5 VDC.
- Limit total current to 2.0 A per group and 8.0 A per module.
- Derate channel current from 1.0 A at 30 °C to 0.3 A at 60 °C.
TECHNICAL INFORMATION
Configuration Guidelines
- Configure controller memory addressing using either BCD or natural binary data formatting.
- Allocate processor output image bits corresponding to the 32 discrete channel positions.
TECHNICAL INFORMATION
Compatibility
- Allen-Bradley PLC-5 control systems.
- Allen-Bradley 1771-A1B, 1771-A2B, 1771-A3B, 1771-A4B, and later 1771 chassis.
- Allen-Bradley 1771-WH and 1771-WN field wiring arms.
TECHNICAL INFORMATION
Lifecycle / Replacement Information
- Available through secondary industrial automation supply channels for existing PLC-5 installations.
- Blown group fuses may be replaced individually to restore affected output channels.
TECHNICAL INFORMATION
Compliance and Certifications
- IEC/CISPR 11 Class 1, Class A Industrial Equipment.
TECHNICAL RESOURCES
Documentation
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSAllen-Bradley PLC-5 control systems. Allen-Bradley 1771-A1B, 1771-A2B, 1771-A3B, 1771-A4B, and later 1771 chassis. Allen-Bradley 1771-WH and 1771-WN field wiring arms.
Verify compatibility against the exact Part Number, revision and manufacturer documentation before ordering.
PART VERIFICATION
Before You Order
Industrial automation parts can share similar model names, suffixes and revisions. Confirm the complete manufacturer Part Number before purchase.
01Check Part NumberMatch the complete ordering code on the existing unit.
02Confirm RevisionCheck suffix, hardware or firmware when applicable.
03Send a Label PhotoWe can review a clear label photo when identification is uncertain.
ORDERING PROCESS
From RFQ to Dispatch
1Submit Part Number2Verify Product Identity3Confirm Stock & Condition4Issue Quotation5Dispatch & Tracking
PRODUCT FAQ
Frequently Asked Questions
What chassis types support the Allen-Bradley 1771-OAN module?
The module installs into Allen-Bradley 1771-A1B through 1771-A4B and subsequent 1771 I/O chassis models.
What is the continuous current rating for each output channel?
Each channel handles 1.0 A at 30 °C, derating to 0.3 A at 60 °C.
How are the output channels protected against electrical faults?
Internal replaceable fuses protect each of the four eight-channel output groups independently.
What is the market reference price for the 1771-OAN?
Observed market reference pricing is around $1,779 for refurbished units. These figures are indicative market reference pricing only and are not a final quotation.
