PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1771-IR is an Analog Input Module designed for the PLC-5 series. This module provides six three-wire RTD inputs for precise temperature measurement. It operates directly from the I/O rack backplane without external power supplies. Supported data formats include natural binary, BCD actual temperature, and ohm resistance values. The hardware architecture incorporates open wire detection for RTD sensor circuits.
Platinum sensor configurations span a temperature range of minus 200 to positive 870 degrees Celsius. Copper sensor circuits measure temperatures from minus 200 to positive 260 degrees Celsius. The module accommodates overall field resistance values from 1.00 to 600.00 Ohms. Measurement resolution reaches 0.1 degree Celsius or 0.1 degree Fahrenheit with platinum sensors. With copper sensors, the module delivers 0.3 degree Celsius or 0.5 degree Fahrenheit resolution. Signal wiring terminates at 1771-WF or 1771-WH field wiring arms.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
|---|
| Category | PLCs |
|---|
| Product Line | PLC 5 |
|---|
| UPC | 612598114740 |
|---|
| Weight | 1.88 lbs (0.85 kg) |
|---|
| Typical AC Signal Delay (Off) | 45 (+/- 15) ms |
|---|
| Typical DC Signal Delay (On) | 10 ms |
|---|
| Wiring Arm | 1771-WH |
|---|
| External Power Required | No |
|---|
| Backplane Current | 800 Miliamperes |
|---|
| Voltage Range | 100 Ohms platinum, 10 Ohms other |
|---|
| Channel Update/Resolution | 50 ms/8 channel; 16 bits + sign (1.0 Celsius/1.0 Fahrenheit/bit) |
|---|
| Data Format | Natural Binary, BDC Actual Temperature, or Ohm Readings |
|---|
| Number of Inputs & Outputs | 6 Three-Wire RTD Inputs |
|---|
| Module Type | RTD Input |
|---|
| Typical DC Signal Delay (Off) | 50 ms |
|---|
| Mounting | Rack Mountable |
|---|
TECHNICAL INFORMATION
Features
- Six three-wire RTD input channels on a single module assembly.
- Selectable data output formats including natural binary, BCD temperature, and direct resistance readings.
- Requires no external power supply by drawing power from the chassis backplane.
- Integrated open wire detection to identify broken sensor wiring.
- Wide resistance measurement range spanning 1.00 to 600.00 Ohms.
- Supports platinum and copper RTD temperature sensor types.
TECHNICAL INFORMATION
Connections / Interfaces
- Six three-wire RTD input connection terminals.
- Field connection interface using 1771-WF or 1771-WH wiring arms.
- Chassis backplane connector interface.
TECHNICAL INFORMATION
Installation Guidelines
- Mount the module into a compatible 1771 series I/O chassis slot.
- Connect field RTD wiring using keying positions between 10 and 12 or 28 and 30.
TECHNICAL INFORMATION
Configuration Guidelines
- Configure temperature data formats for natural binary, BCD, or direct ohm measurements.
- Select sensor channel scaling according to connected platinum or copper RTD elements.
TECHNICAL INFORMATION
Compatibility
- Compatible with Allen-Bradley PLC-2, PLC-3, and PLC-5 programmable controllers.
- Mounts in 1771-A1B, 1771-A2B, 1771-A3B, and 1771-A4B I/O chassis.
- Uses 1771-WF or 1771-WH swing-arm wiring connectors.
TECHNICAL RESOURCES
Documentation
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSCompatible with Allen-Bradley PLC-2, PLC-3, and PLC-5 programmable controllers. Mounts in 1771-A1B, 1771-A2B, 1771-A3B, and 1771-A4B I/O chassis. Uses 1771-WF or 1771-WH swing-arm wiring connectors.
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 sensor types are supported by the Allen-Bradley 1771-IR module?
The module supports 100 Ohm platinum sensors and 10 Ohm copper RTD sensors.
Does the 1771-IR module require external power?
No external power is required because it draws operating power from the chassis backplane.
Which wiring arms connect to the 1771-IR module?
The module connects using Allen-Bradley 1771-WF or 1771-WH wiring arms.
What is the market reference price for the 1771-IR?
Observed prices range from $468.00 to $1,290.00. These figures are indicative market reference pricing only and are not a final quotation.
