Allen Bradley 1797-PS1E FLEX Ex Intrinsically Safe DC Power Supply

Product Overview

The Allen Bradley 1797-PS1E provides high-integrity DC power specifically for FLEX Ex™ intrinsically safe I/O systems. This robust power supply converts high-voltage AC input into regulated DC power for modules operating in Zone 1 or Zone 2 hazardous locations. Despite its discontinuation by the manufacturer, we maintain 100% Brand New and Original units in stock to support critical infrastructure and legacy system maintenance. Its Quad-Ex rating and flame-proof enclosure make it a vital component for oil refineries, chemical plants, and grain processing facilities.

Technical Specifications

The 1797-PS1E features specialized protection circuitry and a heavy-duty chassis:

Engineering Advantages

The 1797-PS1E solves the complex challenge of delivering power within explosive atmospheres:

• Flame-Proof Protection: The unit utilizes a specialized flame-proof enclosure that contains any internal spark or explosion. This prevents the ignition of external flammable gases, allowing the power supply to reside closer to the field devices in hazardous zones.

• Universal AC Input: The wide 85-250 V AC input range accommodates global power standards without requiring external step-down transformers or complex wiring modifications. This simplifies installation in multinational plant designs.

• Quad-Ex Redundancy Support: The Quad-Ex architecture provides four isolated outputs, ensuring that a single fault does not compromise the entire I/O rack. This design maximizes system availability in high-consequence process environments.

• Thermal Heat Sinking: The 15.04 lb cast-metal chassis acts as a massive passive heat sink. This eliminates the need for fans—which are prone to failure in dusty or corrosive environments—ensuring long-term reliability even under full-load conditions.

FAQs

• How can you provide a "Brand New" unit if the manufacturer discontinued it in 2017?

  We specialize in sourcing surplus and "New Old Stock" (NOS) from industrial reserves. Every 1797-PS1E we ship undergoes a rigorous quality inspection to confirm its 100% Brand New status, complete with original seals and zero previous field use.

• Is the 1797-PS1E compatible with standard FLEX I/O (1794 series)?

  No. The 1797-PS1E specifically serves the FLEX Ex (1797) intrinsically safe family. Do not attempt to use this with standard 1794 modules as the physical backplane and safety barriers differ significantly.

• What are the specific grounding requirements for this unit?

  Hazardous area regulations require strict adherence to grounding protocols. You must connect the 1797-PS1E to a dedicated, low-impedance safety ground to ensure the intrinsic safety barriers function correctly and prevent static buildup.

• Does the weight of the unit impact mounting?

  Yes. At 15.04 lbs, the 1797-PS1E is significantly heavier than standard I/O modules. Ensure your DIN rail or mounting plate can support the static load and withstand the mechanical vibrations inherent to heavy industrial machinery.