1794-PS3 | Allen-Bradley FLEX I/O 24V DC Power Supply Module

Product Overview

The Allen-Bradley 1794-PS3 functions as the high-capacity power source for the FLEX I/O 1794 modular system. This module converts wide-range AC input voltage into stable 24V DC power to energize I/O adapters and modules within a distributed rack. With a 72-watt output capacity, it provides sufficient current to drive up to 10 FLEX I/O adapters, making it the primary choice for high-density I/O configurations. We supply this unit in 100% Brand New and Original condition, ensuring your control system receives factory-certified voltage regulation and protection from the first day of commissioning.

Technical Specifications

Engineering Advantages

The 1794-PS3 resolves power instability and noise challenges in complex industrial environments through several specialized hardware features:

• Universal AC Input Capability: The module accepts any voltage between 85V and 264V AC. This allows engineers to deploy the same hardware globally, regardless of local grid standards (120V or 230V), simplifying spare parts inventory and system design.

• Superior High-Voltage Isolation: Internal circuitry provides 2500V DC isolation between the AC input and DC output. This robust barrier protects sensitive downstream I/O modules and communication adapters from high-voltage transients and line noise typical of heavy-duty plant floors.

• Optimized High-Density Powering: The 3A output current provides enough "surge" capacity to drive up to 10 adapters. This high power-to-size ratio eliminates the need for multiple smaller power supplies, saving significant DIN-rail space in crowded marshalling cabinets.

• Integrated Fault Protection: Onboard overcurrent and overvoltage protection (clamping at 35V DC) shield your I/O investment. The module automatically shuts down during a short circuit or surge, preventing damage to the more expensive logic modules connected to the Flexbus.

• Flexible Mounting Orientation: While horizontal mounting maximizes output at 3A, the module supports various orientations with only a slight derating to 2.8A. This flexibility solves installation headaches in narrow or uniquely shaped enclosures where space is at a premium.

FAQs

• How many FLEX I/O modules can a single 1794-PS3 power?

  The 1794-PS3 provides 72 Watts of power, which typically supports up to 10 adapters. To determine the exact count, you must sum the current requirements of each module in your specific rack to ensure the total draw remains below 3A.

• How do I verify the "Brand New" condition of the module?

  We guarantee every 1749-PS3 arrives in its original Allen-Bradley factory box with intact security seals. Each unit carries a unique UPC (612598206629) for manufacturer traceability, confirming the unit has zero previous runtime or electrical cycles.

• Does this power supply require a specific terminal base?

  No, the 1794-PS3 is a standalone power supply module that mounts directly to the DIN rail. You wire the AC input and DC output directly to its integrated terminal points, following the schematic provided in the installation manual.

• What happens if the current draw exceeds 3.2A?

  The integrated overcurrent protection activates at approximately 3.2A. The module will limit the current or shut down the output to protect its internal components and the connected field devices from thermal runaway or permanent failure.