Allen Bradley 1794-OF4IXT FLEX XT I/O Isolated Analog Output Module

Product Overview

The Allen Bradley 1794-OF4IXT functions as a high-precision analog output solution within the FLEX™ XT I/O family, engineered specifically for environments with extreme temperature fluctuations and electrical interference. This module provides four fully isolated channels that convert 15-bit digital data into precise current (4-20mA) or voltage (+/- 10V) signals. The "XT" designation signifies an extended temperature profile, while the "I" denotes channel-to-channel isolation. We provide this unit as 100% Brand New and Original, offering a robust interface for driving control valves, actuators, and motor drives in critical process applications.

Technical Specifications

The 1794-OF4IXT delivers superior signal modulation through the following technical parameters:

Engineering Advantages

The 1794-OF4IXT addresses technical hurdles in distributed I/O and process regulation:

• Superior Galvanic Isolation: The module features 120V continuous isolation between channels and from the backplane. This prevents ground loops and ensures that electrical noise or faults on one field device do not propagate to the other three channels or the central controller.

• Extended Thermal Range (XT): Designed for extreme industrial conditions, the XT-rated components operate reliably in temperatures far exceeding standard I/O modules. This makes the 1794-OF4IXT ideal for outdoor remote terminal units (RTUs) or cabinets located near high-heat machinery.

• High-Resolution Control: The 15-bit Sigma-Delta converter provides exceptional granularity for analog control. This allows for microscopic adjustments to valve positions or motor speeds, directly improving the efficiency and stability of your closed-loop control systems.

• Rapid Update Capability: The selectable update rates (as fast as 2.5 ms) allow the module to respond to high-speed process changes. This reduces latency between the controller's logic execution and the physical response of the field equipment.

• Low Thermal Signature: Despite its high-performance isolation and conversion, the module generates minimal heat (6.8 BTU/hr). This low power dissipation allows for high-density mounting in small enclosures without requiring additional cooling hardware.

FAQs

• Does this module support both voltage and current outputs simultaneously?

  Yes. The 1794-OF4IXT provides dedicated terminals for both 4-20mA current and +/- 10V voltage. You configure the specific output type for each channel through your PLC programming software (such as Studio 5000).

• What is the benefit of the Sigma Delta conversion in this module?

  Sigma Delta conversion provides high-accuracy oversampling and inherent noise filtering. It ensures that the digital-to-analog conversion remains stable and accurate even in electrically noisy environments typical of factory floors.

• Which terminal bases are compatible with the 1794-OF4IXT?

  This module typically requires a 1794-TB3 or 1794-TBN terminal base. Ensure that your chosen terminal base and the accompanying I/O adapter are also rated for "XT" extended temperature operation to maintain system-wide environmental compliance.

• How do I verify that this unit is brand new?

  Every 1794-OF4IXT unit we ship is 100% Brand New. We supply the hardware in original Allen Bradley factory-sealed packaging with authentic serial numbers and the UPC 612598592586 clearly displayed.