PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1771-IFC is an analog input module designed for the PLC-5 system architecture. It mounts directly into a standard 1771 I/O chassis. The module accepts up to eight single-ended 0 to 10 V analog signals. It converts each analog input into a 12-bit digital value for controller access. The internal circuitry draws 1.3 A at 5 V DC from the backplane.
Signal processing paths provide defined response characteristics across AC and DC operational conditions. The module exhibits an on-state DC delay of 10 ms and an off-state delay of 20 ms. AC response operates with 24 ms typical delay for both on and off states. Maximum off-state leakage current is 1.7 mA for both AC and DC modes. Net module weight is 1.75 lbs.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
|---|
| Input Channels | 8 Single-Ended |
|---|
| Analog Input Range | 0 to 10 V |
|---|
| Resolution | 12-Bit |
|---|
| Backplane Current | 1.3 A at 5 V DC |
|---|
| Max AC Off-State Current | 1.7 mA |
|---|
| Max DC Off-State Current | 1.7 mA |
|---|
| Typical DC Signal Delay (On) | 10 (+/- 4) ms |
|---|
| Typical DC Signal Delay (Off) | 20 (+/- 9) ms |
|---|
| Typical AC Signal Delay (On) | 24 (+/- 10) ms |
|---|
| Typical AC Signal Delay (Off) | 24 (+/- 10) ms |
|---|
| Weight | 1.75 lbs (0.79 kg) |
|---|
TECHNICAL INFORMATION
Features
- Provides eight single-ended analog input channels.
- Supports 0 to 10 V analog input voltage range.
- Delivers 12-bit analog-to-digital conversion resolution.
- Draws 1.3 A backplane current at 5 V DC.
- Maintains maximum off-state leakage current of 1.7 mA.
TECHNICAL INFORMATION
Applications
- Industrial process monitoring with 0 to 10 V transmitters.
- Voltage signal acquisition for PLC-5 automation systems.
TECHNICAL INFORMATION
Connections / Interfaces
- Backplane connection to 1771 I/O chassis backplane.
- Field wiring interface for 8 single-ended analog voltage inputs.
TECHNICAL INFORMATION
Installation Guidelines
- Seat the module securely into an available slot in the 1771 chassis.
- Confirm the chassis power supply accommodates the 1.3 A at 5 V DC load.
- Route field input wiring away from high-voltage motor or switching lines.
TECHNICAL INFORMATION
Configuration Guidelines
- Configure controller data tables to read 12-bit integer values from the module slot.
- Ensure input scaling in ladder logic matches the 0 to 10 V signal range.
TECHNICAL INFORMATION
Compatibility
- Allen-Bradley 1771 I/O chassis.
- Allen-Bradley PLC-5 control systems.
TECHNICAL INFORMATION
Lifecycle / Replacement Information
- Identified in manufacturer documentation as an earlier PLC-5 model.
- Catalog revision alternate includes 1771-IFC/B.
TECHNICAL RESOURCES
Documentation
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSAllen-Bradley 1771 I/O chassis. Allen-Bradley PLC-5 control systems.
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 input configuration of the Allen-Bradley 1771-IFC?
The Allen-Bradley 1771-IFC provides eight single-ended analog input channels accepting 0 to 10 V signals with 12-bit resolution.
What is the backplane current draw for the 1771-IFC module?
The 1771-IFC requires 1.3 A of backplane current at 5 V DC from the 1771 chassis power supply.
What is the market reference price for the 1771-IFC?
Observed market reference pricing is approximately $199 USD for refurbished units. These figures are indicative market reference pricing only and are not a final quotation.
