Allen-Bradley 1797-IRT8 Flex I/O 1797 Ex RTD/Thermocouple Module

Product Overview

The Allen-Bradley 1797-IRT8 is a specialized analog input module engineered for the FLEX Ex (Explosion-proof) I/O platform. This 8-channel module directly interfaces with RTD and thermocouple sensors to deliver highly accurate temperature data from hazardous locations. It acts as a critical safety barrier, allowing you to monitor volatile processes in oil & gas, chemical, and pharmaceutical industries without risking ignition. We supply this product as 100% Brand New and in original packaging, ensuring it meets strict intrinsic safety standards for your most demanding environments.

Technical Specifications

Engineering Advantages

Intrinsic Safety for Hazardous Locations
The 1797-IRT8 is purpose-built for FLEX Ex applications, allowing you to safely connect temperature sensors in Class I, II, and III hazardous areas. By limiting the energy available to the field devices, this module prevents sparks or thermal effects that could ignite explosive atmospheres. This capability eliminates the need for expensive and bulky explosion-proof conduits, significantly reducing your installation and maintenance costs.

Versatile 8-Channel Temperature Monitoring
With 8 internally bus-configurable inputs, this single module handles a mix of RTD and thermocouple sensors. It processes low-level millivolt signals (40 to 100 mV) with high precision, making it ideal for monitoring reactors, storage tanks, and pipelines. The fast 8-millisecond settling time ensures your control system receives near real-time temperature data, allowing for rapid adjustments to maintain process stability.

Efficient Power and Thermal Management
Designed for energy efficiency, the module operates on a 9.5V DC supply and consumes only 1.6 Watts of field-side power. Its low thermal dissipation (maximum 5.46 BTU/hour) prevents heat buildup inside control cabinets, which is crucial for maintaining the longevity of electronic components in sealed, hazardous location enclosures.

FAQs

Q: What types of temperature sensors can I connect to this module?
A: The 1797-IRT8 features 8 internally bus-configurable inputs designed to interface directly with various RTD (Resistance Temperature Detector) and thermocouple sensors. You can configure the inputs via your controller to match the specific sensor type used in your application.

Q: Is this module suitable for hazardous or explosive environments?
A: Yes. As part of the Allen-Bradley FLEX Ex lineup, the 1797-IRT8 is intrinsically safe. It is specifically engineered to operate in hazardous locations where flammable gases, vapors, or dust may be present, ensuring safe temperature monitoring without ignition risks.

Q: How fast does the module update its temperature readings?
A: The module features a rapid settling time of just 8 milliseconds. This ensures that your automation system receives accurate and timely temperature data, which is essential for tight process control and safety interlocks.