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1794-PS1

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Allen-Bradley 1794-PS1 is a 120/230 V AC input power supply that provides 1 A at 24 V DC for compatible FLEX I/O equipment.
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Technical specifications for 1794-PS1

  • Manufacturer:
    Allen-Bradley
  • Part Number:
    1794-PS1
  • Product Family:
    Flex I/O
  • Product Type:
    FLEX I/O 24 V DC Power Supply
  • Stock:
    1
  • Nominal Input Voltage:
    120/230 V AC
  • Input Voltage Range:
    85…264 V AC
  • Input Frequency:
    47…63 Hz
  • Maximum Real Input Power:
    37 W
  • Maximum Apparent Input Power:
    71 VA
  • Maximum Transformer Load:
    93 VA
  • Output:
    1.0 A at 24 V DC
  • Operating Temperature:
    0…55 °C
  • Storage Temperature:
    -40…85 °C
  • Relative Humidity:
    5…95%, noncondensing
  • Dimensions:
    8.7 × 6.8 × 6.9 cm
  • Weight:
    0.2 kg
  • Tariff Code:
    8504401990
  • Country of origin:
    USA
  • Place of shipment:
    Xiamen, Fujian, China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals AC Input DC Load System Connection Application
  • AC-powered FLEX I/O supply for nominal 120 or 230 V AC systems
  • Accepts an 85…264 V AC input across the 47…63 Hz frequency range
  • Provides external 24 V DC power up to the documented 1 A capacity

1794-PS1 supplies the external 24 V DC source used by legacy FLEX I/O adapters and connected modules.

Its wide AC input range supports nominal 120 or 230 V systems while the output remains limited to the documented 1 A capacity.

Do not parallel this power supply with another unit, and review downstream startup current and any controller-specific resistor requirement before energizing.

Availability, condition, price, and shipping time for 1794-PS1 are confirmed during quotation.

Allen-Bradley 1794-PS1 FLEX I/O 24 V DC Power Supply Manuals, Product Family, Links

Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.

  • The supply accepts the documented 85…264 V AC range at 47…63 Hz.
  • Branch protection, disconnecting means, conductor rating, and grounding remain installation responsibilities.
  • Measure the AC source under load rather than relying only on nominal system voltage.
  • The 24 V DC output is rated for 1 A total user current.
  • Include the adapter, I/O modules, startup demand, and cable loss in the load calculation.
  • Do not wire two 1794-PS1 or related FLEX I/O supplies in parallel.
  • Observe output polarity and the official adapter or controller connection diagram.
  • Use the documented resistor when a 1794-PS1 supplies a FlexLogix controller.
  • Verify output voltage and downstream status before reconnecting field devices.
  • Providing 24 V DC power to compatible FLEX I/O adapters and their local modules.
  • Supplying legacy distributed I/O assemblies from nominal 120 or 230 V AC sources.
  • Powering documented FlexLogix controller arrangements that include the required output-side resistor.
Description
Allen-Bradley 1794-PS1 converts an 85…264 V AC source to a 24 V DC, 1 A output for compatible FLEX I/O assemblies.

The historical Rockwell selection data identifies 47…63 Hz input, 37 W maximum real input power, and a compact DIN-rail-adjacent enclosure for distributed I/O power.

Before reuse or replacement, verify the complete model, input branch protection, output loading, polarity, grounding, spacing, ambient temperature, and any model-specific load or resistor requirement.
Alternative Names
1794-PS1 1794PS1 1794 PS1 Allen-Bradley 1794-PS1 Allen Bradley 1794-PS1 AB 1794-PS1 Rockwell Automation 1794-PS1
Technical notes
1794-PS1 supplies 24 V DC to legacy FLEX I/O equipment; confirm AC input protection, total load, polarity, grounding, clearance, and any FlexLogix resistor requirement, because parallel operation is prohibited.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
What should be verified before replacing Allen-Bradley 1794-PS1 with another 24 V DC supply?
Compare input protection, regulated output capacity, startup behavior, isolation, grounding, mounting, clearances, approvals, and total station load. Also retain any documented FlexLogix-specific connection required by the original installation.
What load information is needed before selecting Allen-Bradley 1794-PS1?
Add the 24 V DC demand of the adapter, modules, and any user loads, include startup behavior and cable voltage drop, and keep the total within the documented output capacity.
What should be checked if a FLEX I/O station reboots intermittently after fitting Allen-Bradley 1794-PS1?
Measure the supply under startup and full load, then inspect AC input stability, terminal tightness, polarity, cable voltage drop, downstream shorts, grounding, ventilation, and the documented controller connection.
What should be inspected on an installed Allen-Bradley 1794-PS1 before reuse?
Check the nameplate, terminals, enclosure, grounding, heat or discoloration, fanless ventilation path, input protection, output polarity, and measured voltage under the intended load.
Can Allen-Bradley 1794-PS1 be replaced by choosing only the same 24 V output voltage?
No. Compare input range, frequency, output current, startup behavior, grounding, mounting, dimensions, approvals, shutdown behavior, and any downstream compatibility requirement.
Why might Allen-Bradley 1794-PS1 output collapse when modules start?
The connected load or inrush may exceed capacity, wiring may have excessive resistance, input voltage may sag, or a downstream short or polarity error may be present.
What installation detail most often affects Allen-Bradley 1794-PS1 reliability?
Maintain the documented ambient range and clearance, use correctly sized conductors and branch protection, tighten terminals, ground the assembly, and avoid parallel connection with another supply.