PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1771-IDC is an isolated AC/DC input module for PLC-5 systems. It interfaces two-state field devices with programmable controllers across a 1771 Universal I/O chassis backplane. The module provides six electrically isolated input circuits rated for 120V AC or DC nominal service. It operates across an input voltage range of 92 to 138 Volts AC or DC.
Each input channel includes dedicated input filtering to reduce voltage transient interference and contact bounce. Backplane power draw requires 74 milliamperes from the 1771 chassis power supply. Six front-panel status LEDs provide discrete visual indication for each monitored input circuit during active operation. The assembly functions in ambient operating temperatures ranging from 0 to 60 degrees Celsius.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
|---|
| AC Operating Voltage | 92-138 Volts |
|---|
| Backplane Current | 74 Miliamperes |
|---|
| Category | PLCs |
|---|
| DC Operating Voltage | 92-138 Volts |
|---|
| Max AC Off-State Current | 1.7 Miliamperes |
|---|
| Max DC Off-State Current | 1.7 Miliamperes |
|---|
| Model Status | Earlier Model |
|---|
| Module Type | Digital AC/DC Input Module |
|---|
| Number of Inputs | 6 Inputs |
|---|
| Product Line | PLC 5 |
|---|
| Typical AC Signal Delay (Off) | 24 (+/- 10) ms |
|---|
| Typical AC Signal Delay (On) | 24 (+/- 10) ms |
|---|
| Typical DC Signal Delay (Off) | 20 (+/- 9) ms |
|---|
| Typical DC Signal Delay (On) | 10 (+/- 4) ms |
|---|
| Voltage Category | 120 Volts AC/DC |
|---|
| Weight | 1.00 lbs (0.45 kg) |
|---|
TECHNICAL INFORMATION
Features
- Six isolated AC/DC input channels operate independently.
- Integrated input filtering minimizes transient electrical noise and contact bounce.
- Front panel provides six LED indicators for individual input status verification.
- Compatible with 1771 Universal I/O chassis architectures.
- Draws 74 mA directly from the chassis backplane.
TECHNICAL INFORMATION
Applications
- Interfacing pushbuttons and selector switches from separate control power sources.
- Monitoring limit switches and float switches in motor control centers.
- Isolated digital signal acquisition in industrial process control systems.
TECHNICAL INFORMATION
Connections / Interfaces
- Connects to 1771 Universal I/O chassis backplane using standard edge connectors.
- Field wiring interfaces discrete sensors across isolated input channels.
TECHNICAL INFORMATION
Installation Guidelines
- Install the module into any slot of a 1771 I/O chassis.
- Account for the 74 mA backplane current draw in system power supply calculations.
- Handle the device using electrostatic discharge precautions before removing it from its protective bag.
TECHNICAL INFORMATION
Compatibility
- Allen-Bradley PLC-5 systems utilizing 1771 Universal I/O chassis backplanes.
TECHNICAL INFORMATION
Compliance and Certifications
- CSA certified for Class I, Division 2, Groups A, B, C, and D hazardous locations.
- UL listed.
- CE certified.
TECHNICAL RESOURCES
Documentation
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSAllen-Bradley PLC-5 systems utilizing 1771 Universal I/O chassis backplanes.
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-IDC?
It interfaces six isolated 120V AC or DC field inputs with PLC-5 programmable controllers.
How much backplane current does the 1771-IDC require?
The module requires 74 mA of current directly from the 1771 chassis backplane.
What is the market reference price for the 1771-IDC?
Observed market reference pricing is approximately $79.00 for refurbished units. This is indicative market reference pricing only and not a final quotation.
