The Allen Bradley 1771-IR is a PLC-5 series RTD input module designed for the 1771 I/O platform. It is engineered for accurate temperature monitoring using Resistance Temperature Detectors (RTDs) in industrial process control systems.
The module provides highly stable and precise temperature acquisition, making it suitable for applications where reliable thermal measurement is essential for system safety, efficiency, and product quality.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Allen Bradley (Rockwell Automation) |
| Catalog Number | 1771-IR |
| Module Type | RTD Input Module |
| System Family | PLC-5 / 1771 I/O |
| Input Channels | 6 RTD channels |
| Supported RTD Types | Platinum, Nickel, Copper RTDs |
| RTD Wiring | 2-wire / 3-wire compatible |
| Temperature Resolution | High-resolution temperature conversion |
| Input Signal Type | Resistance-based temperature sensing |
| Measurement Range | Depends on RTD type configuration |
| Conversion Method | Analog-to-digital temperature conversion |
| Backplane Current Draw | ~600 mA @ 5 V DC |
| Isolation | Channel and system isolation |
| Data Format | Binary / scaled engineering values |
| Wiring Arm | 1771-WN |
| Mounting Type | 1771 chassis slot |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Weight | ~0.45 kg |
| Dimensions (L×W×H) | 203 mm × 76 mm × 127 mm |
System Role Overview
The 1771-IR module is designed for direct RTD temperature acquisition within PLC-5 systems. It converts resistance changes from RTD sensors into accurate digital temperature values for industrial control and monitoring.
Core functions include:
- Precision RTD temperature monitoring
- Direct connection to industrial RTD sensors
- Stable thermal measurement in harsh environments
- Integration with PLC-5 process control systems
- Support for multi-channel temperature acquisition
It is widely used in process industries where accurate thermal feedback is critical.
Recommended Related Modules
| Model | Function |
|---|---|
| 1771-IFE | Standard analog input module |
| 1771-IFF | High-resolution analog input module |
| 1771-IFM | Fast millivolt input module |
| 1771-OBD | Digital output module |
| 1771-OWNA | Relay output module |
| 1771-ASB | Remote I/O adapter |
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