Overview

The 1756-IRT8I is an advanced Allen-Bradley ControlLogix analog input module designed for high-precision temperature measurement. It is versatile, supporting RTD, Thermocouple, and millivolt inputs, with eight isolated channels. This module is engineered for industries requiring high-resolution temperature sensing, offering 24-bit resolution for accurate readings. Its flexible input range options and robust diagnostics ensure reliable performance across various applications.

Technical Specifications:

• Manufacturer: Rockwell Automation
• Brand: Allen-Bradley
• Model: 1756-IRT8I
• Module Type: ControlLogix RTD/Thermocouple/Millivolt Module
• Input Range:
  • RTD (Platinum, Nickel, Copper)
  • Thermocouple (Types B, C, D, E, J, K, N, R, S, T)
  • Millivolt (-100 to 100 mV)
• Resolution: 24-bit
  • 0-510Ω: 0.06mΩ/count
  • 0-1020Ω: 0.12mΩ/count
  • 0-2040Ω: 0.25mΩ/count
  • 0-4080Ω: 0.50mΩ/count
  • -101 to 101 mV: 0.01μV/count
• Power Consumption:
  • 24V: 150mA
  • 5V: 200mA
• Power Dissipation: 4.6W
• Thermal Dissipation: 15.7 BTU/hour
• Data Format: IEEE 32-bit floating point
• Sampling Rate: 1ms per channel
• Noise Rejection: 75dB (normal mode), up to 160dB (common mode)

FAQ:

• Q1: What types of sensors can be connected to the 1756-IRT8I?
  The module supports a wide range of RTDs, thermocouples, and millivolt signals, including 100Ω and 1000Ω platinum RTDs, Type K thermocouples, and signals in the -100mV to 100mV range.
• Q2: Can this module be used for multi-sensor setups?
  Yes, the 1756-IRT8I features 8 isolated channels, which allows for multiple sensors to be connected and monitored simultaneously.
• Q3: How accurate is the CJC compensation?
  The Cold Junction Compensation has an accuracy of ±0.3°C, ensuring accurate temperature measurements for thermocouples.
• Q4: What is the resolution of this module?
  The module has a 24-bit resolution with different accuracies based on the input range, providing highly detailed readings.
• Q5: What is the power consumption of the 1756-IRT8I?
  At 24V, the module draws 150mA of current and consumes a maximum of 4.6W of power.