Allen-Bradley 1794-PS1 FLEX I/O Power Supply 3A | Replacement, Equivalent & Selection Guide
The Allen-Bradley 1794-PS1 is a 3A power supply module designed for the FLEX I/O platform, providing stable 24V DC bus power to FLEX I/O adapter and I/O modules. This page serves as a comprehensive selection and sourcing reference for engineers, procurement teams, and system integrators seeking the original unit, compatible replacements, or equivalent alternatives.
Technical Specifications
- Part Number: 1794-PS1
- Manufacturer: Allen-Bradley / Rockwell Automation
- Series: FLEX I/O
- Output Current: 3A @ 5V DC (backplane bus)
- Input Voltage: 24V DC (nominal)
- Input Voltage Range: 20.4–28.8V DC
- Power Dissipation: ≤ 5W (typical)
- 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)
- Mounting: DIN rail (35mm)
- Certifications: UL, CE, cUL
- Weight: Approx. 500g
- Dimensions: Standard FLEX I/O module form factor
Compatible Replacement & Equivalent Models
The following models are commonly evaluated as replacements or equivalents for the 1794-PS1. Always verify electrical and mechanical compatibility before substitution.
| Model | Manufacturer | Output Current | Input Voltage | Compatibility Notes |
|---|---|---|---|---|
| 1794-PS1 | Allen-Bradley | 3A | 24V DC | Original — direct fit |
| 1794-PS13 | Allen-Bradley | 3A | 120/240V AC | AC input variant; same backplane output |
| 1794-PS1K | Allen-Bradley | 3A | 24V DC | Conformal-coated version for harsh environments |
| 1794-PS3 | Allen-Bradley | 5A | 24V DC | Higher current; use when I/O count is expanded |
| 1794-PS7 | Allen-Bradley | 10A | 24V DC | High-density systems; not a drop-in replacement |
Note: Third-party equivalents may exist but are not officially supported by Rockwell Automation. Contact Konmask for sourcing guidance.
Why Choose the Original 1794-PS1
- Guaranteed Compatibility: Factory-tested to work seamlessly with all 1794-series FLEX I/O adapters and modules.
- Rockwell Automation Firmware Support: Fully recognized by Studio 5000, RSLogix 5000, and FactoryTalk diagnostics.
- Regulatory Compliance: UL/CE certified for use in safety-critical and regulated industrial environments.
- Long-Term Availability: Konmask maintains stock of both new and refurbished units to support legacy system maintenance.
- Warranty & Traceability: All units supplied with full documentation and traceability records.
Typical Applications
- Automotive assembly line control panels
- Food & beverage processing automation
- Pharmaceutical batch control systems
- Water/wastewater treatment SCADA panels
- Oil & gas remote I/O skids
- Machine tool and packaging machinery
- Building automation and HVAC control
System Compatibility
The 1794-PS1 is designed to power the FLEX I/O backplane and is compatible with the following Allen-Bradley system components:
- Adapters: 1794-AENT, 1794-ACNR15, 1794-ADN, 1794-APB, 1794-ASB
- I/O Modules: All 1794-series digital and analog I/O modules
- Controllers: ControlLogix (1756), CompactLogix (1769), MicroLogix (via adapter)
- Networks: EtherNet/IP, ControlNet, DeviceNet, PROFIBUS DP, Remote I/O
- Software: Studio 5000 Logix Designer, RSLogix 5000 v13+, FactoryTalk View
Selection Guide
Use the following criteria to select the correct power supply for your FLEX I/O system:
- Step 1 — Calculate total backplane current: Sum the 5V backplane current draw of all I/O modules and the adapter in your bank.
- Step 2 — Select output rating: Choose 1794-PS1 (3A) if total draw ≤ 3A; upgrade to 1794-PS3 (5A) or 1794-PS7 (10A) for larger banks.
- Step 3 — Confirm input voltage: Use 1794-PS1 for 24V DC input; use 1794-PS13 if only AC supply is available.
- Step 4 — Check environment: Select 1794-PS1K for high-humidity, corrosive, or vibration-intensive environments requiring conformal coating.
- Step 5 — Verify certifications: Confirm UL/CE requirements with your local compliance team before final selection.
Quality Assurance & Sourcing
- All 1794-PS1 units sourced by Konmask undergo incoming inspection including visual, functional, and label verification.
- New units are supplied in original Rockwell Automation packaging with factory seal intact.
- Refurbished units are tested to OEM specifications and supplied with a 12-month warranty.
- Full material traceability documentation available upon request (COC, test reports).
- Anti-counterfeit measures: all units verified against Rockwell Automation authorized distributor records where applicable.
How to Order
- Confirm your part number: 1794-PS1 (or specify variant: PS13 / PS1K / PS3 / PS7).
- Specify quantity and required condition: New / Refurbished / Exchange.
- Provide your delivery timeline and destination country for shipping quote.
- Contact Konmask via email or phone — we respond within 1 business day.
- Purchase orders accepted; proforma invoice available for prepayment.
Email: support@konmask.com
Phone/WhatsApp: +0086 19859288691
Website: https://Konmask.com
Replacement & Compatibility FAQ
Q: Can I replace a 1794-PS1 with a 1794-PS3?
A: Yes. The 1794-PS3 provides 5A output and is backward compatible with the same 24V DC input. It is a direct upgrade, not a downgrade risk.
Q: Is the 1794-PS1 compatible with 1794-AENT EtherNet/IP adapters?
A: Yes. The 1794-PS1 powers the backplane bus shared by the adapter and all I/O modules in the bank, regardless of network type.
Q: What happens if the backplane current exceeds 3A?
A: The power supply will enter thermal protection or shut down. Always calculate total module current draw before selecting a power supply rating.
Q: Can I use a generic 24V DC power supply instead of the 1794-PS1?
A: No. The 1794-PS1 is a dedicated backplane power supply module — it is not a standard DIN rail PSU. It must be installed in the FLEX I/O bank.
Q: Do you supply 1794-PS1 with a certificate of conformance?
A: Yes. COC and test documentation are available upon request for all units.
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Contact: support@konmask.com | +0086 19859288691
