Allen-Bradley 1794-OB16PXT FLEX I/O 16-Point 24V DC Protected XT Output Module

Product Overview

The Allen-Bradley 1794-OB16PXT functions as a ruggedized, high-density discrete output module for the FLEX I/O platform. It provides 16 sourcing outputs rated for 24V DC operation. The "XT" designation signifies its specialized construction for Extended Temperature environments, while the "P" indicates integrated Electronic Protection. This module drives industrial loads such as solenoids, relays, and indicators in extreme climates where standard I/O fails. We supply this unit as 100% Brand New original factory stock, ensuring maximum performance for your mission-critical outdoor or high-heat applications.

Part Number Breakdown

The 1794-OB16PXT follows a high-performance nomenclature for the FLEX I/O series:

• 1794: Identifies the FLEX I/O modular system.

• OB: Specifies a Digital DC Sourcing Output.

• 16: Denotes the high-density 16-point channel count.

• P: Indicates Integrated Electronic Protection (Short Circuit/Overload).

• XT: Marks the Extended Temperature and ruggedized hardware rating.

Technical Specifications

The 1794-OB16PXT delivers precise power control across a broad thermal spectrum:

Engineering Advantages

The 1794-OB16PXT solves critical engineering challenges in remote or hazardous field locations:

• Thermal Resilience for Remote Assets: Unlike standard modules that fail at 55°C, the XT rating extends operation to +70°C. This capability eliminates the need for expensive air conditioning or heat exchangers in outdoor control panels located in desert or high-heat industrial zones.

• Self-Healing Electronic Protection: The integrated electronic protection detects short circuits or overcurrent conditions on individual channels. This prevents the module from sustaining permanent damage and eliminates the need for external fusing for each output, saving significant cabinet space and labor.

• Reduced Lifecycle Maintenance: By using industrial-grade components designed for a -20°C to +70°C range, the 1794-OB16PXT resists the thermal stress that typically leads to premature failure in standard PLC hardware.

• Rapid Fault Localization: High-visibility LEDs provide instant feedback. A red fault indicator signals an overload condition, allowing maintenance teams to identify and resolve field-side wiring issues without complex diagnostic software.

FAQs

Does the 1794-OB16PXT require a specific terminal base for XT operation?

To achieve the full -20°C to +70°C thermal rating, you must install the 1794-OB16PXT on an XT-rated terminal base, such as the 1794-TB3XT or 1794-TBNXT. Using a standard terminal base limits the system to standard temperature specifications.

How does the "Electronic Protection" feature respond to a short circuit?

The module monitors current flow on each channel. If a short circuit occurs, the module automatically shuts down the affected output to protect internal circuitry. Once you clear the field fault, the module resets the output during the next power cycle or logic reset.

Is this module a refurbished unit or new production?

We guarantee this unit is 100% Brand New in original factory packaging. It has never seen field service, ensuring that the internal protective semiconductors and logic chips possess their full original MTBF (Mean Time Between Failures) rating.

Can I mix XT and non-XT modules in the same FLEX I/O rack?

Yes, the 1794-OB16PXT remains physically and electrically compatible with standard FLEX I/O components. However, the rack's overall temperature rating will only match the lowest-rated component in the assembly.