Allen-Bradley 1771-IT I/O Module
| Brand | Allen-Bradley |
| Module Number | 1771-IT |
| Unit Price | $500 |
| Country Of Origin | USA |
| Weight | 0.5kg |
| Certificate |
C/O from the Chamber of Commerce C/Q from the Manufacturer |
| Warranty | 12 Months |
| Inventory Qty | 2 |
Allen-Bradley 1771-IT is a high-precision thermocouple input module designed specifically for PLC-5 systems. It directly acquires millivolt-level temperature signals from J/K/T/E/R/S/B type thermocouples.
Allen-Bradley 1771-IT Key parameters
|
Parameter |
Specification |
|
Module Type |
Isolated Thermocouple Input |
|
Input Channels |
8 channels (individually configurable) |
|
Supported Thermocouples |
J/K/T/E/R/S/B/N (software selectable) |
|
Temperature Range |
Type B: 400°C to 1820°C Type T: -200°C to 400°C |
|
Resolution |
15-bit (including sign bit) |
|
Accuracy (after calibration) |
±0.05% FSR or ±0.3°C |
|
Cold Junction Compensation |
±0.5°C accuracy @ 25°C |
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Payment Term：T/T
Allen-Bradley 1771-IT Key Features
Full-range Cold-Junction Compensation
The Allen-Bradley 1771-IT features a built-in high-precision ambient temperature sensor that automatically corrects cold-junction errors at the terminal block, ensuring long-term temperature measurement accuracy in high-temperature environments such as steelmaking converters.
Millivolt-level Signal Processing
The module supports a minimum resolution of 50μV, accurately capturing the subtle voltage changes of a Type B thermocouple at 1820°C. This performance far exceeds that of competing products.
Ground Loop Interference Resistance
Transformer isolation technology effectively eliminates signal distortion caused by multiple grounding points in equipment, making it suitable for use in areas with strong electromagnetic interference, such as electrolysis plants.
Allen-Bradley 1771-IT Application examples
U.S. Steel Corporation's Indiana Harbor Steel Plant deployed a cluster of 68 Allen-Bradley 1771-IT modules across 14 electric arc furnaces, providing real-time monitoring of molten steel temperatures at 1600°C, with a continuous operating cycle exceeding 15 years.
Norwegian marine diesel engine manufacturing: Wärtsilä's Bergen plant uses the 1771-IT to collect exhaust gas temperatures in its turbocharger test benches. The single-point sampling error is ≤±2°C, meeting IMO Tier III certification.
