Allen‑Bradley 1797‑PS1E FLEX Ex Intrinsically Safe Power Supply

Product Description
1797-PS1E is an intrinsically safe power supply module of Rockwell Allen‑Bradley FLEX Ex remote I/O system, designed for hazardous explosive areas. It accepts wide-range 85~253V AC input and converts to four independent galvanically isolated intrinsically safe DC output channels, each channel limited to 8.5W power. The unit adopts flameproof Ex d enclosure with IP65 protection grade, certified by ATEX/IECEx for Zone1 / Zone22 hazardous locations. It is specially used to supply power for FLEX Ex series I/O modules, limiting output energy to avoid igniting flammable gas, and widely used with ControlLogix platform in hazardous process industries.

Key Functions

• AC input: 85~253V, 47~63Hz wide voltage range
• 4 independent intrinsically safe output channels, 8.5W per channel, total 34W
• Galvanic isolation between input and each output channel, single loop fault will not affect other channels
• Energy-limited intrinsically safe circuit, open-circuit voltage ≤9.5V, short-circuit current ≤1A
• Flameproof enclosure, IP65 protection for field cabinet installation
• Built-in over-current, short-circuit protection and fault diagnosis function
• ATEX / IECEx certified for Zone1 gas hazardous area

Application Scenarios

• Offshore oil & gas platform, oil refinery hazardous area remote I/O power supply
• Chemical plant, petrochemical explosive gas zone control system
• ControlLogix DCS paired FLEX Ex intrinsically safe remote I/O station
• Pharmaceutical and solvent manufacturing process safety control

FAQ

Q: What system does 1797-PS1E match?
A: It belongs to 1797 FLEX Ex series, supporting ControlLogix platform for intrinsically safe remote I/O.

Q: What hazardous zone can it apply to?
A: Certified for Zone1 gas and Zone22 dust hazardous locations.

Q: Is each output channel independent?
A: Yes, four channels are galvanically isolated, fault on one channel will not interrupt other outputs.