Introduction
The Allen Bradley 1794-IT8 is an analog input module from the FLEX I/O series, specifically designed for thermocouple temperature measurement in industrial automation systems. This module provides 8 thermocouple input channels with high-accuracy temperature sensing and supports multiple thermocouple types (J, K, T, E, R, S, B). Its modular design allows integration with FLEX I/O chassis for compact, flexible control panels and distributed I/O systems. The 1794-IT8 is ideal for applications where precise and reliable temperature data is critical for process control.
Technical Specifications
| Parameter | Specification | Notes / Comments |
|---|---|---|
| Input Channels | 8 | Thermocouple input points. |
| Supported Thermocouple Types | J, K, T, E, R, S, B | Configurable per channel. |
| Accuracy | ±0.25% sur span typical | High-accuracy industrial measurement. |
| Input Impedance | ≥10 MΩ | Ensures minimal signal loading. |
| Cold Junction Compensation | Built-in, automatic | Maintains measurement accuracy. |
| Sampling Rate | 10 samples/sec per channel | Typical update rate for all channels. |
| Isolation | 1500 Vrms channel-to-backplane | Protects signals from interference. |
| Current Draw @5.1 V DC | ~200 mA | Typical operating current. |
| Power Dissipation | ~2.5 W | Approximate under full load. |
| Operating Temperature | 0°C to +60°C | Standard industrial range. |
| Storage Temperature | -40°C to +85°C | For non-operating conditions. |
| Relative Humidity | 5% to 95% non-condensing | Environmental tolerance. |
| Dimensions (H × W × D) | 90 mm × 35 mm × 90 mm | Approx. 3.5″ × 1.4″ × 3.5″. |
| Poids | 0.28 kg (0.62 lbs) | Approximate module weight. |
Applications
The 1794-IT8 module is used in diverse industrial applications requiring precise temperature measurement:
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Process Control Systems: Chemical, pharmaceutical, and food processing plants where temperature accuracy is critical.
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Industrial Furnaces and Ovens: Monitoring and controlling high-temperature processes.
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HVAC Systems: Measuring ambient and equipment temperatures for regulation.
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Energy & Power Plants: Temperature sensing for turbines, boilers, and heat exchangers.
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OEM Machines: Integrating temperature inputs into custom machinery and test equipment.
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Laboratory and R&D Facilities: Accurate temperature logging for experimental setups.
Advantages
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High Accuracy Thermocouple Measurement: ±0.25% typical accuracy ensures reliable process data.
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Supports Multiple Thermocouple Types: Flexibility to handle J, K, T, E, R, S, and B types in one module.
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Cold Junction Compensation Built-In: Maintains accuracy without additional devices.
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Compact & Modular Design: Fits easily in FLEX I/O chassis, saving panel space.
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Isolation for Signal Integrity: 1500 Vrms isolation reduces interference from other modules.
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Reliable in Industrial Environments: Rated for 0–60°C operation and wide humidity ranges.
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Integration with Studio 5000 & CompactLogix: Works seamlessly with Allen Bradley controllers and ssurtware for easy configuration.
Informations sur l'entreprise
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Add: Alishan Building, 2 Lvling Rd, District Siming, Xiamen, Fujian, Chine, 361006
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