PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1771-IA is a PLC-5 digital input module designed for industrial control applications. This unit provides eight discrete input channels operating across 120V AC and 125V DC nominal voltage levels. Operating ranges span 87 to 138 volts AC and 97 to 138 volts DC. The backplane current requirement is 75 milliamperes.
Nominal input current is 6.83 milliamperes at 120V AC 50 Hz and 7.9 milliamperes at 120V AC 60 Hz. When operating at 125V DC, the nominal input current draws 7.4 milliamperes. Signal wiring terminates via the dedicated 1771-WA field wiring arm. This module mounts directly into compatible 1771 I/O chassis assemblies.
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 | 10662468205440 |
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| Weight | 2.00 lbs (0.91 kg) |
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| Module Type | Digital AC/DC Input Module |
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| Number of Inputs | 8 Inputs |
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| Voltage Category | 120 Volts AC/DC |
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| Compatible Chassis | 1771-AB thru 1771-A4B |
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| AC Operating Voltage | 87-138 Volts |
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| DC Operating Voltage | 97-138 Volts |
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| Backplane Current | 75 Miliamperes |
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| Max AC Off-State Current | 2.8 Miliamperes |
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| Typical AC Signal Delay (On) | 24 (+/- 10) ms |
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| Typical DC Signal Delay (On) | 10 (+/- 4) ms |
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| Typical DC Signal Delay (Off) | 20 (+/- 9) ms |
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| UPC | 10662468205440 |
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| Wiring Arm | 1771-WA |
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| Agency Certification (when product or packaging is marked) | • CSA certified • CSA Class I, Division 2, Groups A, B, C, D certified • UL listed • CE marked for all applicable directives |
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TECHNICAL INFORMATION
Features
- Provides eight discrete AC and DC input channels.
- Accepts AC operating voltages from 87 to 138 volts.
- Supports DC operating voltages from 97 to 138 volts.
- Draws 75 milliamperes of backplane current.
- Requires a 1771-WA field wiring arm for terminations.
- Limits maximum off-state current to 2.8 milliamperes.
TECHNICAL INFORMATION
Connections / Interfaces
- Field wiring attaches to the 1771-WA wiring arm.
- The wiring arm allows module replacement without disturbing field wiring.
TECHNICAL INFORMATION
Installation Guidelines
- Insert the module into any slot of a compatible 1771 chassis.
- Disconnect chassis power before inserting or removing the module.
- Pivot the 1771-WA field wiring arm into place to secure connections.
TECHNICAL INFORMATION
Compatibility
- Compatible with Allen-Bradley 1771-AB through 1771-A4B I/O chassis.
- Requires the Allen-Bradley 1771-WA field wiring arm.
- Interfaces with Allen-Bradley PLC-5 control systems.
TECHNICAL INFORMATION
Compliance and Certifications
- CSA certified
- CSA Class I, Division 2, Groups A, B, C, D certified
- UL listed
- CE marked for all applicable directives
TECHNICAL RESOURCES
Documentation
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSCompatible with Allen-Bradley 1771-AB through 1771-A4B I/O chassis. Requires the Allen-Bradley 1771-WA field wiring arm. Interfaces with Allen-Bradley PLC-5 control systems.
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 wiring arm is required for the Allen-Bradley 1771-IA?
The module requires the Allen-Bradley 1771-WA field wiring arm for signal connections.
What are the operating voltage ranges for the 1771-IA?
The module operates from 87 to 138 volts AC and 97 to 138 volts DC.
Which chassis models support the 1771-IA module?
The module is compatible with Allen-Bradley 1771-AB through 1771-A4B chassis.
What is the reference market price for the 1771-IA?
Observed market reference pricing is approximately 42 USD for refurbished units. Final quotation depends on condition, inventory availability, and destination requirements. All pricing figures represent indicative market reference pricing only and are not a final quotation.
