Product Description
Allen‑Bradley 1797‑PS1E is an intrinsically safe power supply module of Rockwell FLEX Ex series, designed to power the FLEX Ex intrinsically safe I/O system. It accepts wide-range 85~253V AC input and provides four galvanically isolated intrinsically safe output channels with independent energy limiting per channel. Certified Ex de [ib] IIC T4, it is suitable for Zone 1 hazardous gas areas and Zone 22 dust hazardous areas. It serves as a dedicated safety power source for field IS instruments and FLEX Ex I/O modules in petrochemical, oil & gas and other explosion-proof applications. The input adopts increased safety entry while outputs form IS circuits. Channels are isolated from each other; a fault on one channel will not disturb the restRockwell A….
Specifications
- Catalog No.: 1797‑PS1E (Series B)
- Family: FLEX Ex Intrinsically Safe Power Supply
- Input Voltage: 85…253V AC
- Input Frequency: 47~63Hz
- Input Current: 0.9A
- Output Channels: 4 channels, galvanically isolated, independent IS energy limiting
- Power per Channel: 8.5W
- Total Output Power: 34W
- Max IS Output Voltage Uo: ＜9.5V DC
- Max IS Output Current Io: ＜1A
- Permissible Capacitance Co (IIC): ＜500nF
- Permissible Inductance Lo (IIC): ＜8μH
- Explosion Protection: II 2G Ex de [ib] IIC T4; II 3D Ex tD A22 IP54 T90℃
- Certifications: ATEX, IECEx, UL, C‑UL, FM
- Operating Temperature: -20℃ ~ +70℃
- Input Cable Gland: M20×1.5 (cable 6~12mm)
- Output Cable Gland: M16×1.5 (cable 4~8mm)
- Protection Rating: IP54
- Compatible System: FLEX Ex 1797 I/O, ControlNet Ex bus system
Application
- Instrument power supply for oil production, gas gathering and LNG hazardous zones
- IS transmitters and valve position signals in refineries, chemical reactors and tank farms
- Explosion-proof I/O systems for pharmaceutical, coating and ink workshops with flammable dust
- Distributed automation for offshore platforms, coal chemical plants and gas compressor stations in Zone 1
- Power supply for 1797 IS AI/AO/DI/DO, RTD and thermocouple modules
- Distributed intrinsically safe I/O stations within ControlNet Ex architecture in hazardous locations
Related FLEX Ex Power Supply Models
- 1797‑PS1N
- 1797‑PS2E2
- 1797‑PS2N2
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