The 1756-IRT8I is an 8-channel analog input module under Allen-Bradley’s ControlLogix product line, primarily designed for collecting temperature signals and other analog signals in industrial automation systems.
- Brand: Rockwell Automation (Allen-Bradley)
- Origin: United States
- Dimensions: Approximately 23.3 x 18.2 x 5.3 cm
- Weight: Around 0.35 kg
- Terminal Block Requirement: Compatible with 36-pin RTB (Removable Terminal Block) or detachable terminal block housings, such as Allen-Bradley models 1756-TBCH and 1756-TBS6H.
- Equipped with 8 independently isolated channels, each configurable for different signal types.
- Supported input signals include:
- Thermocouples (e.g., Type B/C/D/E/J/K/N/R/S/T/TXK/L)
- RTDs (Resistance Temperature Detectors, e.g., Pt100/Pt385/Pt392/Cu427)
- Millivolt signals (-100 mV to 100 mV)
- Ohmic signals (1 Ω to 500 Ω)
- ADC Resolution: 24-bit Σ-Δ
- Nonlinearity: ±0.003%
- Temperature Drift: ±10 ppm/℃
- Sampling Rate: 1000 samples per second per channel; ≥62.5 samples per second for multi-channel synchronous sampling
- Isolation Voltage: ≥250 V AC between channels; ≥3000 V AC for system isolation
- Operating Temperature: 0℃ to 60℃
- Storage Temperature: -40℃ to 85℃
- Relative Humidity: 5% to 95% (non-condensing)
- Certifications: IEC 61508 SIL2, ATEX Zone 2 explosion-proof certification, NEMA 4X protection rating
- Supports multi-module input ranges and notch filters for signal optimization.
- Includes under-range/over-range detection, digital filters, and process/rate alarms for real-time monitoring.
- Offers sensor offset adjustment, 10-ohm copper offset compensation, and open-circuit detection.
- Allows configuration of temperature units, sensor types, thermocouple wire length compensation, and synchronous sampling.
- Enables hot-swapping for module replacement or upgrade without system shutdown.
Ideal for industrial temperature monitoring and control scenarios, such as:
- Temperature control of chemical reactors
- Steam monitoring in power plant boilers
- Level control of metallurgical continuous casters
- Sterilization process monitoring in food and beverage industry
- Other occasions requiring precise collection of temperature or analog signals
