PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1771-IAN is a 32-point digital input module for PLC-5 systems. It converts alternating and direct current field signals into processor logic levels. The module interfaces with pushbuttons, limit switches, and selector switches. It directly updates corresponding data bits in the controller image table. Internal optoelectrical isolation protects system backplane circuitry from electrical transients. Built-in input filtering suppresses electrical noise across all field channels.
The unit operates across an AC voltage range of 85 to 138 volts. It draws 280 mA of current from the chassis backplane. Wiring connections terminate at an external 1771-WN wiring arm. This wiring arm permits fast module replacement without disturbing field cables. Thirty-two front status indicators provide channel-level diagnostic visibility during operation. The module supports both 1/2-slot and 1-slot addressing configurations.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
|---|
| AC Operating Voltage | 85-138 Volts |
|---|
| Backplane Current | 280 Miliamperes |
|---|
| Category | PLCs |
|---|
| Max AC Off-State Current | 3.0 Miliamperes |
|---|
| Max DC Off-State Current | 0.8 Miliamperes |
|---|
| Module Type | Digital AC/DC Input Module |
|---|
| Number of Inputs | 32 Inputs (4 Sets of 8) |
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| Product Line | PLC 5 |
|---|
| Typical AC Signal Delay (Off) | 20 (+/- 15) ms |
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| Typical AC Signal Delay (On) | 10 (+/- 7) ms |
|---|
| UPC | 612598117260 |
|---|
| Voltage Category | 120 Volts AC/DC |
|---|
| Weight | 1.00 lbs (0.45 kg) |
|---|
| Wiring Arm | 1771-WN |
|---|
TECHNICAL INFORMATION
Features
- 32 discrete inputs organized into 4 isolated groups of 8 channels.
- Optoelectrical isolation prevents transient field noise from reaching backplane circuits.
- Front panel contains 32 red LED indicators for input status verification.
- Removable 1771-WN wiring arm eliminates field rewiring during maintenance replacements.
- Hardware input filters reduce the impact of electrical contact bounce and noise.
- Supports 1/2-slot and 1-slot I/O addressing within 1771 chassis racks.
TECHNICAL INFORMATION
Applications
- Discrete AC and DC sensor monitoring in industrial PLC-5 automation systems.
- Field interface for limit switches, pushbuttons, and selector switches.
- Motor starter and annunciator state monitoring on factory automation lines.
TECHNICAL INFORMATION
Connections / Interfaces
- Uses the 1771-WN field wiring arm for all external I/O connections.
- Field inputs are arranged in four groups of eight isolated input channels.
- Connects to the 1771 backplane through dual edge-connector slots.
TECHNICAL INFORMATION
Installation Guidelines
- Mount the module into any available slot of an Allen-Bradley 1771 chassis.
- Insert upper plastic keying bands between backplane pins 20 and 22.
- Position lower plastic keying bands between backplane pins 16 and 18.
- Seat the 1771-WN wiring arm onto the chassis pivot pins before tightening.
TECHNICAL INFORMATION
Configuration Guidelines
- Configure the chassis backplane DIP switches for 1/2-slot or 1-slot addressing mode.
- Map the 32 input points to the designated PLC-5 input data table addresses.
TECHNICAL INFORMATION
Compatibility
- Compatible with Allen-Bradley 1771 I/O chassis assemblies.
- Requires the Allen-Bradley 1771-WN wiring arm for field terminal connections.
TECHNICAL INFORMATION
Lifecycle / Replacement Information
- The 1771-IAN is part of the legacy Allen-Bradley PLC-5 system architecture.
- Direct replacement is supported in existing 1771 I/O chassis using the 1771-WN wiring arm.
TECHNICAL RESOURCES
Documentation
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSCompatible with Allen-Bradley 1771 I/O chassis assemblies. Requires the Allen-Bradley 1771-WN wiring arm for field terminal connections.
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 operating voltage range of the Allen-Bradley 1771-IAN?
The 1771-IAN operates within an AC input voltage range of 85 to 138 volts.
Which wiring arm is required for the 1771-IAN input module?
The module requires the Allen-Bradley 1771-WN wiring arm for field wiring connections.
How many input points does the 1771-IAN provide?
The module provides 32 digital inputs organized into four groups of eight channels each.
What is the market reference price for the 1771-IAN?
Observed market reference pricing is approximately 297.00 USD for refurbished units. This figure represents indicative market reference pricing only and is not a final quotation.
