1797-PS2E2 Allen‑Bradley FLEX Ex Intrinsically Safe Power Supply Module

Product Description

1797-PS2E2 is an intrinsically safe FLEX Ex power supply unit manufactured by Allen‑Bradley (Rockwell Automation), designed for hazardous area FLEX Ex I/O systems. It accepts 18~32V DC input and provides four independent intrinsically safe output channels, each rated 8.5W. Housed in a flameproof enclosure with increased safety cable glands, it galvanically isolates the input power from hazardous field circuits and limits available energy to prevent ignition in explosive atmospheres. It supports dual redundant DC power feeds and supplies power to 1797 series FLEX Ex I/O modules installed in Zone 1 / Class I Div 1 hazardous locations.

Product Features & Functions

• 18–32V DC input range, four independent intrinsically safe output channels at 8.5W per channel
• Dual DC power input terminals for redundant power supply connection to improve system reliability
• Galvanic isolation between input side and hazardous-area output circuits
• Independent intrinsic safety energy limiting for each output channel to meet explosion protection requirements
• Flameproof enclosure with M20 input gland and M16 Ex output cable glands for field wiring
• Certified for Zone 1, Class I Division 1 hazardous explosive environments (IIC T4)
• Supports powering FLEX Ex I/O modules for field sensors and transmitters in hazardous zones
• Built-in circuit protection against overvoltage, overcurrent and short-circuit faults on output channels
• Compact explosion-proof package for direct mounting in classified hazardous field areas

Application Scenarios

• Oil & gas, refinery and petrochemical plant hazardous zone distributed I/O control
• Chemical manufacturing process monitoring and intrinsically safe field instrument power supply
• Offshore platform and onshore wellsite FLEX Ex automation system deployment
• Explosive dust and gas classified area sensor and transmitter power distribution
• Legacy 1797 FLEX Ex I/O system maintenance, spare replacement and site retrofit

FAQ

Q: What is 1797-PS2E2?
A: It is a FLEX Ex intrinsically safe power supply for Allen‑Bradley 1797 hazardous area I/O system, providing four independent IS output channels.

Q: What is the power rating for each output channel?
A: Each of the four output channels delivers up to 8.5W intrinsically safe power for field I/O modules.

Q: Is 1797-PS2E2 still in production?
A: Rockwell Automation discontinued this FLEX Ex power supply. New old stock, used and refurbished units are available through industrial spare parts suppliers.