PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1771-OA is a PLC-5 digital output module designed for alternating-current field loads. This unit provides eight output channels delivering an operating voltage range from 92 to 138 Volts AC. Each individual output channel has a continuous current rating of 1.5 Amperes at line frequency. The total current across all channels on the entire module cannot exceed 6 Amperes.
The module mounts into any standard 1771 universal I/O chassis slot. Field wiring terminates at a removable 1771-WA or 1771-WH field wiring arm. Fluorescent status indicators show the operating state for each individual channel. An integrated blown-fuse indicator identifies compromised output circuits using field supply voltage. Each channel withstands a surge current of 4 Amperes for 8.3 milliseconds.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
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| Category | PLCs |
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| Product Line | PLC 5 |
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| GTIN | 10662468205761 |
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| Weight | 2.00 lbs (0.91 kg) |
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| Module Type | AC output module |
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| No. of Inputs | Eight (8) outputs |
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| Operating Voltage Range | 92 - 138VAC |
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| Output Frequency | 47-63 Hz |
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| Output current rating per channel | 1.5 A |
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| Output current rating per module | 6 A |
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| Power Dissipation | 1.1-10.7 Watts |
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| Thermal Dissipation | 3.4-36.6 BTU/hr |
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| Compatible chassis | 1771 I/O chassis |
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| Keying | Between 4 and 6; Between 12 and 14 |
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| Field Wiring Arm | Cat. No. 1771-WA |
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| Wiring Arm Screw Torque | 7-9 inch-pounds |
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| Number of Outputs | 8 Outputs |
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| Voltage Category | 120 Volts AC |
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| AC Operating Voltage | 92-138 Volts |
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| Backplane Current | 1.5 Amperes |
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| Max Continuous Current Per Output | 1.5 Amperes |
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| Max Current Per Module | 6 Amperes |
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| Wiring Arm | 1771-WH |
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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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| UPC | 10662468205761 |
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TECHNICAL INFORMATION
Features
- Eight independent AC output channels operating from 92 to 138 Volts AC.
- Delivers up to 1.5 Amperes continuous current per channel with 6 Amperes module total.
- Withstands surge currents up to 4 Amperes per channel for 8.3 milliseconds.
- Equipped with fluorescent indicators displaying individual channel status.
- Contains a dedicated blown-fuse indicator powered by the field power supply.
- Includes an internally installed 2 Ampere 250 Volt Buss AGC2 fuse.
- Compatible with 1771-WA and 1771-WH field wiring arms.
TECHNICAL INFORMATION
Applications
- Energizing AC solenoid-actuated valves and mechanical actuators.
- Driving magnetic contactors and starter coils up to NEMA Size 4.
- Operating acoustic alarms, signaling horns, buzzers, and warning sirens.
- Powering AC indicator lamps and industrial control panel pilot lights.
TECHNICAL INFORMATION
Connections / Interfaces
- Connects to field wiring via the 1771-WA or 1771-WH wiring arm.
- Accepts field wire sizes from 14 to 22 AWG with 75 degrees Celsius insulation.
- Field wire insulation thickness must not exceed 1.2 millimeters.
- Interfaces with the PLC-5 backplane through the 1771 chassis card-edge connector.
TECHNICAL INFORMATION
Installation Guidelines
- Switch off backplane and field power before installing or removing the module.
- Install keying bands between chassis pins 4 and 6, and pins 12 and 14.
- Tighten field wiring arm terminal screws to 7 to 9 inch-pounds.
- Seat the module securely into any single slot of a 1771 I/O chassis.
TECHNICAL INFORMATION
Configuration Guidelines
- Configure controller I/O tables using BCD or Natural Binary data formats.
- Observe an off-state signal delay of 45 milliseconds plus or minus 15 milliseconds.
- Ensure aggregate module continuous current draw does not exceed 6 Amperes.
TECHNICAL INFORMATION
Compatibility
- Compatible with Allen-Bradley 1771 universal I/O chassis.
- Operates with Allen-Bradley PLC-5 programmable logic controller systems.
- Uses catalog number 1771-WA or 1771-WH field wiring arms.
TECHNICAL RESOURCES
Documentation
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSCompatible with Allen-Bradley 1771 universal I/O chassis. Operates with Allen-Bradley PLC-5 programmable logic controller systems. Uses catalog number 1771-WA or 1771-WH 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 is the continuous current rating of the 1771-OA?
Each channel delivers up to 1.5 Amperes, with an aggregate module limit of 6 Amperes.
Which field wiring arms are compatible with the 1771-OA?
The module uses Allen-Bradley catalog numbers 1771-WA and 1771-WH field wiring arms.
What are the chassis backplane keying positions for this module?
Insert keying bands between pins 4 and 6, and between pins 12 and 14.
What is the reference price range for the 1771-OA?
Observed market prices range between $59.00 and $79.00 USD. These figures are indicative market reference pricing only and not a final quotation.
