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Allen-Bradley 1797-IJ2 FLEX Ex Frequency Input Module

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ManufacturerAllen Bradley

Part number1797-IJ2

Input Type Frequency; Gate

Number of Inputs 4

Input Frequency 1-32,767 Hz

Processing Time 4 ms max.

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Veteran-owned

CAGE: 9NK75

High Resolution Frequency Input FLEX Ex Intrinsically Safe 4 Inputs Fast Processing Time For Hazardous Environments Part of Flex I/O System

Product description

The Allen-Bradley 1797-IJ2 is a FLEX Ex Frequency I/O module designed for precise frequency and gate input in industrial automation. This module features 4 inputs and supports an input frequency range of 1-32,767 Hz, with a maximum processing time of 4 ms. It is part of the Flex I/O family and is suitable for applications requiring high-resolution frequency monitoring and control.

This module is particularly useful in environments where explosive atmospheres may be present, due to its FLEX Ex intrinsic safety certification. It is ideal for use in industries such as oil & gas, chemical processing, and pharmaceuticals, where safety and accuracy are paramount. The module requires a 1797-TB3 or 1797-TB3S intrinsically-safe terminal base unit for installation.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Allen-Bradley 1797-IJ2. We provide reliable access to specialized industrial components, ensuring your critical operations are supported by the right equipment. Partner with Stanlo Automation for your automation needs.

Technical specifications

Input Type	Frequency; Gate
Number of Inputs	4
Input Frequency	1-32,767 Hz
Processing Time	4 ms max.
Thermal Dissipation	14.5 BTU/hr max.
Module Field-side Power Consumption	4.25 W
Protection Rating	IP20

Common applications

Oil & Gas

Chemical Processing

Pharmaceuticals

Mining

Hazardous Location Control

Process Monitoring

Compatible systems

1797-TB3 Terminal Base 1797-TB3S Terminal Base Flex I/O Systems

Also known as

Allen-Bradley Flex EX Frequency Module 1797-IJ2 Frequency Module PLC Frequency Input

Replaces / compatible with

Compatible with Allen-Bradley 1797-TB3 and 1797-TB3S intrinsically-safe terminal base units.

Technical note

Expert tip

This module must be installed on a 1797-TB3 or 1797-TB3S intrinsically-safe terminal base unit to maintain its safety certifications.

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Frequently asked questions

What are the safety certifications for the Allen-Bradley 1797-IJ2 module?

The Allen-Bradley 1797-IJ2 FLEX Ex Frequency Input Module is certified for use in hazardous environments, including 'Ex ia IIB/IIC T4' and 'AEx ia IIC T4' under intrinsic safety standards. This ensures safe operation in potentially explosive atmospheres.