PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1771-IBN is a 32-channel digital input module designed for the PLC-5 control architecture. This module interfaces external DC field devices with the programmable controller data table. It operates within a DC voltage range of 10 to 30 Volts DC. The hardware accommodates source-switching devices such as selector switches, pushbuttons, and dry contacts.
The unit provides 32 inputs organized into four isolated groups of eight channels each. It draws 280 milliamperes of current from the 1771 backplane at 5 Volts DC. Front-panel light-emitting diodes indicate the active logic status for each individual input circuit. Field wiring connects through a removable 1771-WN wiring arm to simplify hardware replacement.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
|---|
| Backplane Current | 280 Milliamperes |
|---|
| Category | PLCs |
|---|
| Coating | Conformal Coat |
|---|
| DC Operating Voltage | 10-30 Volts |
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| Max DC Off-State Current | 1.7 Miliamperes |
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| Module Type | Digital DC Input Module |
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| Number of Inputs | 32 Inputs (4 Sets of 8) |
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| Off-state voltage, max | 5V DC |
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| On-state voltage, min | 10V DC |
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| Product Line | PLC 5 |
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| Typical AC Signal Delay (Off) | 20 (+/- 15) ms |
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| Typical DC Signal Delay (On) | 6 (+/- 2) ms (Digital Filter) |
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| UPC | 662468268097 |
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| Voltage Category | 10-60 Volts DC, Sink (Source Load) |
|---|
| Weight | 1.88 lbs (0.85 kg) |
|---|
| Wiring Arm | 1771-WN |
|---|
TECHNICAL INFORMATION
Features
- Features 32 discrete DC sinking input channels configured in four groups of eight.
- Provides optical isolation to protect backplane logic circuits from field transients.
- Includes digital input filtering with a typical 6 millisecond propagation delay.
- Displays channel status through 32 dedicated front-panel LED indicators.
- Supports module replacement without disconnecting field leads using the 1771-WN arm.
TECHNICAL INFORMATION
Applications
- Interfacing 24V DC pushbuttons and selector switches in industrial operator consoles.
- Monitoring dry contact auxiliary outputs from motor starters and electrical switchgear.
- Receiving discrete position signals from electro-mechanical limit switches and sensors.
TECHNICAL INFORMATION
Connections / Interfaces
- Requires a 1771-WN field wiring arm for terminal terminations.
- Accepts solid or stranded copper wire sized from 0.25 to 2.5 mm².
- Specifies a terminal screw tightening torque of 1.0 Newton-meter.
- Uses keying bands between upper pins 18-20 and lower pins 14-16.
TECHNICAL INFORMATION
Installation Guidelines
- Install the unit into any compatible slot of a 1771 I/O chassis.
- Insert keying bands into backplane connectors to ensure proper slot alignment.
- Ensure chassis power is off before inserting or removing the module.
- Secure the 1771-WN wiring arm after module insertion.
TECHNICAL INFORMATION
Configuration Guidelines
- Assign the module to either 1/2-slot or 1-slot I/O addressing structures.
- Map the 32 input bits directly into the assigned PLC-5 data table words.
TECHNICAL INFORMATION
Compatibility
- Compatible with Allen-Bradley 1771 I/O chassis and PLC-5 processors.
- Supports 1/2-slot and 1-slot I/O addressing modes within PLC-5 systems.
- Interfaces with 24V DC pushbuttons, limit switches, and dry contact transmitters.
TECHNICAL RESOURCES
Documentation
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSCompatible with Allen-Bradley 1771 I/O chassis and PLC-5 processors. Supports 1/2-slot and 1-slot I/O addressing modes within PLC-5 systems. Interfaces with 24V DC pushbuttons, limit switches, and dry contact transmitters.
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 field wiring arm is required for the Allen-Bradley 1771-IBN?
The 1771-IBN requires the 1771-WN field wiring arm. It permits module swap-out without disturbing field wiring.
What is the operating voltage range for the 1771-IBN input module?
The operating voltage range is 10 to 30 Volts DC. The nominal input voltage rating is 24 Volts DC.
How much backplane current does the 1771-IBN draw?
The module draws a maximum backplane current of 280 milliamperes at 5 Volts DC.
What is the reference price for the 1771-IBN module?
Market reference pricing is approximately 79 USD for surplus or refurbished units. This is indicative reference pricing only, not a final quotation.
