PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1771-IBD is a 16-point discrete DC input module designed for the PLC-5 system architecture. It occupies a single I/O slot across compatible 1771 chassis assemblies. The unit interfaces field signaling devices operating within a 10 to 30V DC range. It accepts inputs from dry contacts, pushbuttons, selector switches, and electro-mechanical transmitters.
Internal circuitry includes optoelectrical isolation to safeguard backplane circuits against electrical surges and line transients. An integrated hardware filter attenuates line noise across all input paths. The module draws 130 mA backplane current at 5V DC. Status indicators on the front panel provide real-time channel diagnostics and operational feedback for rapid troubleshooting.
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 | 10662468100660 |
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| Weight | 1.44 lbs (0.65 kg) |
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| Module Type | Digital DC Input Module |
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| No. of Inputs | Sixteen (16) Inputs |
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| Operating Voltage Range | 10 to 30VDC |
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| Input Delay Time, OFF to ON | 1 ms |
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| Input Delay Time, ON to OFF | 1 ms or 6 ms |
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| Power Dissipation | 7.3 Watts (max.), 1.0 Watts (min.) |
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| Thermal Dissipation | 24.7 BTU/hr (max.), 3.4 BTU/hr (min.) |
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| Backplane Current at 24 Volts | 130mA @ 5V dc +5% |
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| Compatible chassis | All 1771 I/O chassis except 1771-A1, -A2, and -A4 |
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| Keying | Between 10 and 12; Between 16 and 18 |
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| Field Wiring Arm | Cat. No. 1771-WH |
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| Wiring Arm Screw Torque | 7-9 inch-pounds |
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| Number of Inputs | 16 Inputs |
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| Voltage Category | 10 to 60 Volts DC, Sink (Source Load) |
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| DC Operating Voltage | 10 to 30 Volts |
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| Backplane Current | 130 Miliamperes |
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| Max DC Off-State Current | 2.0 Miliamperes |
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| Wiring Arm | 1771-WN |
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| Typical AC Signal Delay (Off) | 20 (+/- 15) milliseconds |
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| UPC | 10662468100660 |
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TECHNICAL INFORMATION
Features
- Sixteen discrete input channels operating from 10 to 30V DC.
- Sink load input configuration compatible with sourcing field devices.
- Optoelectrical isolation between field wiring and system logic circuits.
- Front-panel LED indicators displaying channel logic states and module health.
- Support for 1/2-slot, 1-slot, and 2-slot I/O addressing modes.
- Hardware filtering designed to suppress electrical line noise.
- Removable field wiring arm interface to simplify servicing.
TECHNICAL INFORMATION
Applications
- Interfacing selector switches, pushbuttons, and pilot devices in manufacturing machinery.
- Monitoring dry-contact limit switches and auxiliary relay contacts.
- Receiving binary status inputs from electro-mechanical transmitters and field sensors.
TECHNICAL INFORMATION
Connections / Interfaces
- Compatible with removable field wiring arm catalog numbers 1771-WH and 1771-WN.
- Upper connector chassis keying positions set between pins 16 and 18.
- Lower connector chassis keying positions set between pins 10 and 12.
TECHNICAL INFORMATION
Installation Guidelines
- Mount the module into any compatible 1771 chassis slot containing backplane connections.
- Do not install the module in chassis models 1771-A1, 1771-A2, or 1771-A4.
- Insert plastic keying bands into backplane edge connectors at specified pin locations before insertion.
- Fasten wiring arm terminal screws using an applied torque of 7 to 9 inch-pounds.
TECHNICAL INFORMATION
Configuration Guidelines
- Set the PLC-5 chassis backplane addressing to 1/2-slot, 1-slot, or 2-slot mode.
- Configure input filter delay times to match signaling speeds of connected field contacts.
TECHNICAL INFORMATION
Compatibility
- Operates in standard 1771 I/O chassis assemblies excluding 1771-A1, 1771-A2, and 1771-A4.
- Interfaces with sourcing field contacts, pushbuttons, proximity sensors, and limit switches.
TECHNICAL INFORMATION
Lifecycle / Replacement Information
- The 1771-WH removable wiring arm allows direct module replacement without lifting field wires.
- Maintained as legacy hardware for existing PLC-5 control systems and remote racks.
TECHNICAL RESOURCES
Documentation
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSOperates in standard 1771 I/O chassis assemblies excluding 1771-A1, 1771-A2, and 1771-A4. Interfaces with sourcing field contacts, pushbuttons, proximity sensors, and limit switches.
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
Which chassis models support the 1771-IBD module?
The module installs into standard 1771 chassis models except 1771-A1, 1771-A2, and 1771-A4.
What wiring arms work with the 1771-IBD?
Field wiring connects through removable wiring arm catalog numbers 1771-WH or 1771-WN.
What is the market reference price for the 1771-IBD?
Observed market reference pricing spans $49.00 to $290.00 depending on condition. These figures represent indicative reference pricing only and are not a final quotation.
