A-B 1756-IRT8I ControlLogix Isolated RTD/TC Input Module

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    • The Allen-Bradley 1756-IRT8I is an 8-channel isolated RTD/Thermocouple analog input module for ControlLogix systems. Each channel can be individually configured for RTD, resistance, thermocouple, or mV input. Rockwell currently lists the 1756-IRT8I as Active.

      Key Technical Specifications

      Parameter	Specification
      Brand	Allen-Bradley / Rockwell Automation
      Model	1756-IRT8I
      Product Type	Isolated RTD/Thermocouple Input Module
      Channels	8 isolated inputs
      Input Types	RTD, Ohms, Thermocouple, mV
      RTD Wiring	3-wire / 4-wire
      Thermocouple Types	B, C, E, J, K, N, R, S, T, TXK/XK(L), D
      Thermocouple Range	-100 to +100 mV
      RTD Range	Up to 4,000 Ω depending on configuration
      Channel Configuration	Individually configurable
      CJC	2 CJC sensors for thermocouple applications
      Connection	36-pin terminal connection
      Power Dissipation	4.67 W
      Chassis	ControlLogix 1756
      Status	Active

      Rockwell documentation confirms the 8 isolated channels and individually configurable RTD/thermocouple operation.

      Advantages & Features

      • 8 individually isolated analog input channels
      • Supports both RTD and thermocouple signals
      • Flexible 3-wire and 4-wire RTD configurations
      • Supports multiple international thermocouple types
      • Software-configurable input channels
      • Built-in diagnostics and alarming
      • Suitable for temperature measurement and process monitoring
      • Supports real-time channel sampling and engineering-unit scaling

      Typical Applications

      • Industrial temperature monitoring
      • Process control systems
      • Furnace and oven temperature control
      • Chemical and pharmaceutical equipment
      • Food processing machinery
      • Industrial automation and machine control
      • ControlLogix PLC systems

      Important Precautions

      • Verify the Series and firmware compatibility with your ControlLogix system before installation. Rockwell lists Series B firmware 3.011 for this module.
      • Select the correct RTD wiring configuration and sensor type.
      • For thermocouple applications, ensure the appropriate CJC configuration is installed.
      • Use the correct removable terminal block and wiring configuration.
      • Disconnect power before installation or wiring.
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