PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1771-IB is a PLC-5 Digital Input Module. This unit converts direct-current signals from user devices into logic levels for the processor. It directly controls the state of corresponding bits in the PLC data table. The module supports 1/2-slot, 1-slot, and 2-slot addressing within a 1771 chassis. It connects to source-switching devices such as selector switches, pushbuttons, and dry-contact switches.
The 1771-IB features eight DC sink input channels with an operating voltage range of 10 to 27V DC. Opto-electrical isolation protects system logic circuits from electrical transients on connected field lines. Internal input filtering reduces electrical noise from external wiring. Eight red indicators on the front panel display the operational status of individual field inputs. Field connections terminate at a removable 1771-WA or 1771-WN wiring arm. This swing-arm connection permits module replacement without disconnecting individual field wires.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
|---|
| Backplane Current | 74 Miliamperes |
|---|
| Category | PLCs |
|---|
| DC Operating Voltage | 10-27 Volts |
|---|
| GTIN | 10662468205471 |
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| Max DC Off-State Current | 3.0 Miliamperes |
|---|
| Module Type | Digital DC Input Module |
|---|
| Number of Inputs | 8 Inputs |
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| Product Line | PLC 5 |
|---|
| Typical AC Signal Delay (Off) | 20 (+/- 15) ms |
|---|
| Voltage Category | 10-60 Volts DC, Sink (Source Load) |
|---|
| Weight | 0.69 lbs (0.31 kg) |
|---|
| Wiring Arm | 1771-WN |
|---|
TECHNICAL INFORMATION
Features
- Provides eight DC sink input channels for field source devices.
- Opto-electrical isolation safeguards backplane circuits from field line transients.
- Integrated input filtering minimizes electrical noise on signal lines.
- Front-panel red status indicators provide visual confirmation for each channel.
- Supports one-half, one, and two-slot addressing modes in 1771 chassis.
- Removable wiring arm simplifies maintenance by preventing rewiring during replacement.
TECHNICAL INFORMATION
Applications
- Receiving status signals from dry-contact switches in machinery.
- Interfacing industrial pushbuttons and selector switches with PLC-5 systems.
- Monitoring discrete signals from field electro-mechanical transmitters.
TECHNICAL INFORMATION
Connections / Interfaces
- Upper connector keying bands install between pins 14 and 16.
- Lower connector keying bands install between pins 4 and 6.
- Field signal conductors connect via a 1771-WA or 1771-WN wiring arm.
TECHNICAL INFORMATION
Installation Guidelines
- Insert the module into an assigned slot in a 1771 I/O chassis.
- Position chassis keying bands at pins 14-16 upper and pins 4-6 lower.
- Secure the wiring arm to establish electrical contact with terminal points.
TECHNICAL INFORMATION
Configuration Guidelines
- Configure processor data table addressing for one-half, one, or two-slot mode.
- Confirm input signal sources deliver 10 to 27V DC during active operation.
TECHNICAL INFORMATION
Compatibility
- Allen-Bradley 1771 I/O chassis.
- Allen-Bradley PLC-5 control systems.
- 1771-WA and 1771-WN field wiring arms.
TECHNICAL RESOURCES
Documentation
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSAllen-Bradley 1771 I/O chassis. Allen-Bradley PLC-5 control systems. 1771-WA and 1771-WN 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 field devices can connect to the 1771-IB module?
The module accepts inputs from dry-contact switches, electro-mechanical transmitters, selector switches, and pushbuttons.
Which wiring arms work with the 1771-IB?
The 1771-IB is compatible with the 1771-WA and 1771-WN swing-out wiring arms.
What is the reference price for the 1771-IB module?
Observed market reference pricing is approximately $49.00 USD. Figures are indicative market reference pricing only and are not a final quotation.
