PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1771-ODD is a PLC-5 Digital Output Module. This unit delivers 16 isolated AC outputs across an operating range of 85 to 138 Volts AC. The module mounts directly into a standard 1771 I/O chassis. It interfaces field actuators to the programmable controller data table using optical isolation and transient surge suppression.
Each output channel supports a maximum continuous current of 2 Amperes. The complete module manages a total load capacity of 8 Amperes. The module front panel includes 32 indicators displaying channel status and blown-fuse alerts. Field connections wire to a removable wiring arm to speed maintenance replacements without disconnecting leads.
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 | 612598141890 |
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| Weight | 1.50 lbs (0.68 kg) |
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| Module Type | Digital AC Output Module |
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| Number of Outputs | 16 Outputs |
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| Voltage Category | 120 Volts AC |
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| AC Operating Voltage | 85-138 Volts |
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| Backplane Current | 420 Miliamperes |
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| Max Continuous Current Per Output | 2 Amperes |
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| Max Current Per Module | 8 Amperes |
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| Wiring Arm | 1771-WH |
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| Model Status | Earlier Model |
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| Data Format | BDC or Natural Binary |
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| Typical AC Signal Delay (Off) | 45 (+/- 15) ms |
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| Typical DC Signal Delay (Off) | 50 ms |
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| Mounting | Rack Mountable |
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TECHNICAL INFORMATION
Features
- Provides 16 isolated AC output channels rated for 120 Volts AC nominal service.
- Delivers up to 2 Amperes continuous current per output and 8 Amperes per module.
- Includes 32 status indicators showing individual channel operation and blown-fuse conditions.
- Employs optical isolation and filtering to reduce field electrical noise.
- Incorporates internal surge suppression circuitry against AC line voltage transients.
- Supports 1/2-slot, 1-slot, and 2-slot I/O chassis addressing structures.
TECHNICAL INFORMATION
Applications
- Direct switching of industrial AC solenoids, contactors, and motor starter coils.
- Control of intermediate control relays and industrial indicator pilot lights.
- Interfacing PLC-5 control systems to isolated AC field devices.
TECHNICAL INFORMATION
Connections / Interfaces
- Field wiring terminates at an optional 1771-WN or 1771-WH field wiring arm.
- Connects to the backplane across dual edge connectors inside a 1771 chassis.
- Chassis backplane keying bands align between pins 4-6 on the lower connector.
- Upper connector chassis keying aligns between pins 30-32 to secure module positioning.
TECHNICAL INFORMATION
Installation Guidelines
- De-energize chassis power and field supply power before inserting the module.
- Align the module board with chassis card guides and slide inward until seated.
- Fasten the swing-arm latch to secure the module into the backplane connectors.
- Attach the pre-wired arm onto the pivot pins and pivot flush to engage contacts.
TECHNICAL INFORMATION
Configuration Guidelines
- Set the PLC-5 chassis backplane configuration switches for proper slot addressing.
- Map the 16 output bits in the controller output image data table.
- Select BCD or Natural Binary data format according to system control requirements.
TECHNICAL INFORMATION
Compatibility
- Compatible with Allen-Bradley 1771 universal I/O chassis systems.
- Operates with PLC-5 programmable logic controllers and remote I/O adapters.
- Uses standard 1771-WN or 1771-WH field termination wiring arms.
TECHNICAL INFORMATION
Lifecycle / Replacement Information
- The 1771-ODD is an earlier model within the 1771 AC digital output series.
- Shares functional specifications with the 1771-OD AC output module.
- Removable wiring arms allow field replacement without landing individual wires.
TECHNICAL RESOURCES
Documentation
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSCompatible with Allen-Bradley 1771 universal I/O chassis systems. Operates with PLC-5 programmable logic controllers and remote I/O adapters. Uses standard 1771-WN or 1771-WH field termination 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 is the primary function of the Allen-Bradley 1771-ODD module?
The 1771-ODD provides 16 isolated 120 VAC digital outputs to switch field devices directly from PLC-5 systems.
What wiring arm is required for the 1771-ODD module?
This module uses either the 1771-WN or 1771-WH removable wiring arm for field terminations.
What do the front panel status indicators show on the 1771-ODD?
The front panel displays 32 indicators. The left 16 show channel on/off status, while the right 16 indicate blown fuses.
What is the market reference price for the 1771-ODD?
Observed market reference pricing is around $149.00 USD for refurbished condition. This is indicative reference pricing only, not a final quotation.
