Product Details
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:
| Feature | Specification |
| Manufacturer | Allen Bradley (Rockwell Automation) |
| Model | 1797-PS1E |
| Input Voltage | 85–250 V AC (Wide Range) |
| Output Type | DC Power for FLEX Ex Modules |
| Certification | Quad-Ex / Flame-Proof |
| Enclosure Type | Heavy-duty Industrial Cast |
| Weight | 15.04 lbs (6.82 kg) |
| Operating Environment | Hazardous Locations (Intrinsically Safe) |
Engineering Advantages
The 1797-PS1E solves the complex challenge of delivering power within explosive atmospheres:
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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.
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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.
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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.
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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
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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.
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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.
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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.
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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.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
Mastering PLC Programming: Best Practices for Robust Industrial Automation
Writing clean PLC code requires discipline, especially regarding memory management. Avoid overusing SET and RESET instructions, as they often complicate debugging. If multiple rungs control the same bit, troubleshooting becomes a nightmare. Instead, focus on energizing a bit in only one location. If your logic requires complex conditions, use branches within a single rung. This approach keeps your code readable, maintainable, and significantly easier to audit during downtime.
PLC vs. HMI: Distinguishing the Brain from the Interface in Industrial Automation
In the realm of industrial automation, distinguishing between a Programmable Logic Controller (PLC) and a Human-Machine Interface (HMI) is fundamental. While both devices work in tandem, they serve distinct purposes. The PLC acts as the "brain" of the operation, executing logic, whereas the HMI serves as the "eyes," allowing operators to monitor and interact with the system. Understanding this synergy is essential for any professional designing robust factory automation solutions.
Selecting the Right Industrial Automation Solution for Modern Manufacturing
Choosing an effective industrial automation system starts with a thorough process audit. You must identify tasks that are repetitive, labor-intensive, or prone to human error. Not every process requires high-level automation; therefore, prioritize operations that directly impact throughput and quality. By scoping your needs accurately, you avoid over-investing in unnecessary technology. A balanced approach ensures that your capital expenditure aligns with measurable gains in operational efficiency.