Allen-Bradley 1794-PS3 FlexLogix Power Supply | Replacement, Equivalent & Selection Guide
The Allen-Bradley 1794-PS3 is a dedicated power supply module for the Rockwell Automation FlexLogix control system platform. Designed to deliver stable, regulated DC power to 1794 FLEX I/O adapter and I/O modules, the 1794-PS3 is a critical component in distributed control architectures across manufacturing, process, and infrastructure applications. At Konmask.com, we specialize in sourcing, verifying, and supplying original and compatible 1794-PS3 units to help engineers and procurement teams keep their systems running.
Technical Specifications
- Part Number: 1794-PS3
- Manufacturer: Allen-Bradley / Rockwell Automation
- Series: 1794 FLEX I/O / FlexLogix
- Input Voltage: 24V DC (18–32V DC operating range)
- Output Voltage: 5V DC (regulated, for backplane)
- Output Current: 3A maximum
- Power Rating: 15W
- Backplane Compatibility: 1794 FLEX I/O terminal bases
- Mounting: DIN rail or panel mount via 1794 terminal base
- Operating Temperature: 0°C to 55°C (32°F to 131°F)
- Storage Temperature: -40°C to 85°C
- Relative Humidity: 5–95% non-condensing
- Certifications: UL, CE, cUL
- Weight: Approx. 800g (with packaging)
- Dimensions: Refer to Rockwell Automation 1794-PS3 installation manual
Compatible Replacement & Equivalent Models
When the original 1794-PS3 is unavailable or cost-prohibitive, the following models may serve as functional equivalents or drop-in replacements depending on your system configuration. Always verify electrical and mechanical compatibility before substitution.
- 1794-PS13 — Allen-Bradley FLEX I/O power supply, 120/240V AC input; suitable when AC source is preferred over DC
- 1794-PS1 — Earlier-generation Allen-Bradley FLEX I/O power supply; verify output current rating matches load requirements
- 1794-PS2 — 24V DC input variant with different output current; confirm backplane load before substitution
- 1794-PS3XT — Extended-temperature version of the 1794-PS3; direct functional equivalent for harsh environments
- Third-party 24VDC→5VDC DIN-rail PSU — Custom integration possible; requires engineering review for backplane compatibility
Note: Konmask.com recommends using original Allen-Bradley parts for safety-critical or SIL-rated applications. Contact our technical team for substitution validation.
Why Choose the Original 1794-PS3
- Guaranteed Backplane Compatibility: Engineered specifically for the 1794 FLEX I/O platform — no integration risk
- Stable Regulated Output: Tight 5V DC regulation protects sensitive I/O modules from voltage fluctuation
- Rockwell Ecosystem Support: Fully supported by Studio 5000, RSLogix 5000, and FactoryTalk diagnostics
- Proven Reliability: Widely deployed in automotive, food & beverage, oil & gas, and water treatment industries
- Long Service Life: Designed for continuous industrial duty cycles with minimal maintenance
Typical Applications
- Distributed I/O power supply in FlexLogix and ControlLogix architectures
- Machine automation panels requiring compact 24VDC-powered backplane supply
- Process control systems with remote I/O drops on DIN rail enclosures
- Conveyor, packaging, and material handling equipment
- Water/wastewater SCADA remote terminal units (RTUs)
- Oil & gas wellhead and pipeline monitoring panels
System Compatibility
- Compatible Controllers: FlexLogix 1794-L34, ControlLogix 1756 series (via remote I/O), SLC 500 (via adapter)
- Compatible Adapters: 1794-AENT, 1794-ADN, 1794-ACN15, 1794-ACNR15
- Compatible Terminal Bases: 1794-TB3, 1794-TB3S, 1794-TB32, 1794-TB3GK
- Programming Software: RSLogix 5000 / Studio 5000 Logix Designer
- Network Protocols: EtherNet/IP, DeviceNet, ControlNet (depending on adapter)
Selection Guide
Use the following criteria to confirm the 1794-PS3 is the right power supply for your application:
- Input Power Source: Confirm 24V DC supply is available at the panel. If only AC is available, consider 1794-PS13.
- Backplane Load Calculation: Sum the 5V backplane current draw of all I/O modules in the bank. The 1794-PS3 supports up to 3A — do not exceed this limit.
- Environment: For ambient temperatures above 55°C, select the 1794-PS3XT extended-temperature variant.
- Redundancy Requirements: For high-availability systems, consider dual power supply configurations with appropriate terminal base support.
- Certifications: Verify UL/CE requirements match your regional compliance needs.
Quality Assurance & Sourcing
All 1794-PS3 units supplied by Konmask.com undergo the following quality process:
- Visual inspection for physical damage, counterfeit markings, and label authenticity
- Functional power-on test and output voltage verification
- Traceability documentation available upon request (batch/lot records)
- Sourced from authorized distributors, OEM surplus, or verified secondary market channels
- Packaging inspection to confirm original Allen-Bradley / Rockwell Automation labeling
We maintain strict anti-counterfeit sourcing protocols. If you require a Certificate of Conformance (CoC) or test report, please contact us before ordering.
How to Order
- Part Number: 1794-PS3
- Minimum Order Quantity: 1 unit
- Lead Time: In-stock units ship within 1–3 business days; sourced units 5–15 business days
- Payment: T/T (Bank Transfer), PayPal, Trade Assurance
- Shipping: DHL, FedEx, UPS worldwide; sea freight available for bulk orders
- Custom Quotation: Contact support@konmask.com or call +0086 19859288691 for volume pricing
Replacement & Compatibility FAQ
Q: Can I replace the 1794-PS3 with a standard 24V→5V DIN rail power supply?
A: Not directly. The 1794-PS3 is designed to interface with the 1794 terminal base backplane connector. A generic PSU cannot plug into the backplane without custom wiring — consult our engineers before attempting this.
Q: Is the 1794-PS3XT a direct drop-in replacement for the 1794-PS3?
A: Yes, the 1794-PS3XT is functionally identical with an extended operating temperature range. It is a direct mechanical and electrical replacement.
Q: What is the difference between 1794-PS3 and 1794-PS13?
A: The 1794-PS3 accepts 24V DC input; the 1794-PS13 accepts 120/240V AC input. Both supply 5V DC to the backplane. Choose based on your available power source.
Q: How do I calculate if the 1794-PS3 can power my I/O bank?
A: Add the 5V backplane current (mA) listed in each I/O module’s datasheet. The total must not exceed 3000mA (3A). If it does, split the bank into two segments each with its own power supply.
Q: Does Konmask.com provide warranty on 1794-PS3 units?
A: Yes. We offer a 90-day functional warranty on all units. Extended warranty options are available — contact us for details.
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