PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1794-PS3 is a FLEX I/O power supply module for distributed systems. It supplies 24V DC backplane power to connected FLEX I/O hardware assemblies. The unit accepts an input voltage range from 85 to 264V AC. Input operating frequency covers 47 to 63 Hz across single-phase systems. Nominal operating levels are 120V AC at 1.7 A and 230V AC at 1.1 A.
This module delivers a regulated 72 W continuous power output. Horizontal mounting delivers up to 3.0 A continuous output current. Other mounting orientations provide up to 2.8 A output current. Output voltage remains regulated within 20.4 to 27.6V DC. The unit provides sufficient output surge to power up to ten adapters. Integrated overcurrent protection activates at 3.2 A to protect connected hardware.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
|---|
| Product Line | Flex I/O 1794 |
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| UPC | 612598206629 |
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| Weight | 1.00 lbs (0.45 kg) |
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| Thermal Dissipation | 41.0 BTU/hr |
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| Output Current | 3 A (horizontal mounting); 2.8 A all other mountings |
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| Product Description | Flex I/O Power Supply |
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| Input Voltage range | 85-264VAC |
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| Input Frequency range | 47-63 Hz |
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| Nominal input voltage | 120V AC, 50/60 Hz; 1.7 A max. 230V AC, 50/60 Hz; 1.1 A max. |
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| Maximum input current | 1.9 A |
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| Output power | 72 Watts |
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| Output surge | Sufficient to drive 10 adapters |
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| Overcurrent protection | 3.2 A |
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| Power dissipation, max | 12 W |
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| Supply Voltage nom. | 230V AC, 47-63Hz, 1.1A max. |
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| Voltage Range | 85-265V AC |
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| Input Current | 1.9A max. |
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| Output Voltage nom. | 24V DC |
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| Output Voltage Range | 20.4-27.6V DC |
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| Minimum Load | 50mA |
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| Overvoltage Protection | 35V DC |
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| Isolation Voltage | 2500V DC |
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TECHNICAL INFORMATION
Features
- Delivers regulated 24V DC nominal output at up to 72 W.
- Supplies 3.0 A horizontally and 2.8 A in other orientations.
- Operates across an AC input range spanning 85 to 264V AC.
- Provides power supply hold-up during a half-cycle AC voltage drop.
- Features overcurrent protection set at 3.2 A.
- Maintains 2500V DC isolation between AC input and DC output terminals.
TECHNICAL INFORMATION
Applications
- Power distribution for Allen-Bradley FLEX I/O modular assemblies.
- Control enclosures requiring regulated 24V DC power for distributed adapters.
- Industrial equipment installations utilizing DIN rail or panel mounting.
TECHNICAL INFORMATION
Connections / Interfaces
- Dedicated AC input terminals connect AC line, neutral, and ground wiring.
- DC output terminals distribute regulated 24V DC power to system components.
TECHNICAL INFORMATION
Installation Guidelines
- Mount the unit directly onto a standard DIN rail or panel.
- Allow adequate clearance for natural convection to dissipate 41.0 BTU/hr.
- Derate maximum continuous output current from 3.0 A to 2.8 A for vertical mounting.
- Maintain required electrical isolation between AC input terminals and DC output wiring.
TECHNICAL INFORMATION
Configuration Guidelines
- Ensure connected module draw does not exceed 3.0 A in horizontal mountings.
- Confirm the connected load meets the minimum requirement of 50 mA.
TECHNICAL INFORMATION
Compatibility
- Engineered for use with Allen-Bradley FLEX I/O modular systems.
- Provides sufficient capacity to power up to ten FLEX I/O adapters.
TECHNICAL RESOURCES
Documentation
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSEngineered for use with Allen-Bradley FLEX I/O modular systems. Provides sufficient capacity to power up to ten FLEX I/O adapters.
Verify compatibility against the exact Part Number, revision and manufacturer documentation before ordering.
PART VERIFICATION
Before You Order
Industrial automation parts can share similar model names, suffixes and revisions. Confirm the complete manufacturer Part Number before purchase.
01Check Part NumberMatch the complete ordering code on the existing unit.
02Confirm RevisionCheck suffix, hardware or firmware when applicable.
03Send a Label PhotoWe can review a clear label photo when identification is uncertain.
ORDERING PROCESS
From RFQ to Dispatch
1Submit Part Number2Verify Product Identity3Confirm Stock & Condition4Issue Quotation5Dispatch & Tracking
PRODUCT FAQ
Frequently Asked Questions
What is the continuous output current rating for the 1794-PS3?
The 1794-PS3 outputs 3.0 A in horizontal mountings and 2.8 A in other orientations.
What input voltage range does the 1794-PS3 support?
The unit supports an input range of 85 to 264V AC at 47 to 63 Hz.
How many FLEX I/O adapters can the 1794-PS3 energize?
The module provides enough surge and continuous current to energize up to ten adapters.
What is the market reference price for the 1794-PS3?
Observed market reference pricing is approximately $118 USD. This figure is an indicative market reference only and is not a final quotation.
