AB 1746-P1
AB 1746-P1
AB 1746-P1
AB 1746-P1
AB 1746-P1
AB 1746-P1
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  • Lifecycle Status

    Discontinued
    Discontinued date: 2020-09-30

1746-P1

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Allen-Bradley 1746-P1 is a chassis-side AC power supply for SLC 500 modular controllers and I/O systems.
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Technical specifications for 1746-P1

  • Manufacturer:
    Allen-Bradley
  • Part Number:
    1746-P1
  • Product Family:
    SLC 500
  • Product Type:
    SLC 500 Chassis Power Supply
  • Stock:
    1
  • Input voltage:
    85 to 132 VAC or 170 to 265 VAC, 47 to 63 Hz
  • Nominal input selection:
    120 or 220 VAC
  • Maximum input power:
    42 W real; 69 VA apparent
  • Maximum inrush current:
    20 A
  • Backplane output at 5 VDC:
    2.0 A
  • Backplane output at 24 VDC:
    0.46 A
  • Isolated user output:
    24 VDC nominal, 0.2 A; 18 to 30 VDC
  • Input fuse:
    3 A, 250 V
  • Input-to-backplane isolation:
    1800 VAC rms for 1 second
  • CPU hold-up time:
    20 ms at full load; 1000 ms at no load
  • Operating temperature:
    0 to +60°C; derate 5% above +55°C
  • Storage temperature:
    -40 to +85°C
  • Relative humidity:
    5 to 95%, non-condensing
  • Dimensions:
    6.5 × 14.0 × 14.0 cm
  • Weight:
    0.9 kg
  • Tariff Code:
    8504409999
  • 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 Input Setup Load Planning Protection Application
  • Use 1746-P1 only as the documented SLC 500 chassis power supply
  • Set the input-voltage selector to the verified AC source before energizing
  • Keep the backplane and isolated 24 VDC user loads within their separate ratings

Allen-Bradley 1746-P1 is an SLC 500 chassis power supply for modular controllers and I/O systems.

Allen-Bradley 1746-P1 is a chassis-side AC power supply for SLC 500 modular controllers and I/O systems. 1746-P1 is the complete catalog number. The official installation instructions identify Series A hardware, while the current Rockwell lifecycle page lists the catalog as discontinued.

Before installation or replacement, verify the complete nameplate, compatible companion hardware, wiring or network design, saved configuration and commissioning plan.

Availability, condition, price, and shipping time for 1746-P1 are confirmed during quotation.

Allen-Bradley 1746-P1 SLC 500 Chassis Power Supply Manuals, Datasheets, 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.

  • Verify 85 to 132 VAC or 170 to 265 VAC supply before wiring
  • Set the 120/220 VAC selector to match the actual source
  • Connect protective earth and tighten the documented input terminals
  • Total every module load on the 5 VDC backplane rail
  • Total every module load on the 24 VDC backplane rail
  • Budget the isolated 24 VDC user output separately and keep it within 0.2 A
  • Use the documented 3 A, 250 V input fuse
  • Apply the temperature derating above 55°C
  • Investigate power loss, auxiliary shutdown and processor restart as separate fault paths
  • Powering an SLC 500 modular processor and local I/O chassis
  • Supplying a limited isolated 24 VDC auxiliary load for compatible sensors
  • Maintaining legacy SLC 500 machine and process-control racks
Description
1746-P1 is the SLC 500 chassis power supply with selectable 120/220 VAC input and separate 5 VDC and 24 VDC backplane outputs.

Selection must match the chassis load calculation, input voltage, backplane demand and the limited isolated 24 VDC user-output requirement.

Before replacement, record the selector position, wiring, fuse, chassis slot inventory, 5 VDC and 24 VDC loads and any active power or processor faults.
Revisions

Revision Part #

Also known as

1746-P1 Ser A
1746-P1/A, Series A, Rev A
Alternative Names
1746-P1 1746 P1 1746P1 Allen-Bradley 1746-P1 AB 1746-P1 SLC 500 1746-P1 1746-P1/A 1746-P1 Series A
Technical notes
1746-P1 is an SLC 500 chassis power supply with selectable 120/220 VAC input and a limited isolated 24 VDC user output. Confirm the input selector, chassis load and Series A identity before replacement.
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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 must be checked before fitting 1746-P1 to an existing SLC 500 chassis?
Confirm the AC source, input-voltage selector, chassis load budget, Series A identity, protective earth and terminal wiring before energizing the rack.
Can the 1746-P1 24 VDC user output power every field device in the panel?
No. It is an isolated auxiliary output limited to 0.2 A; total sensor and accessory demand must remain within that budget or use a separate approved supply.
What happens if the auxiliary output on 1746-P1 is overloaded?
The user output can shut down while the processor continues operating, so investigate the field load and do not assume a healthy CPU means the auxiliary circuit is healthy.
Can 1746-P1 replace another 1746 power-supply model without engineering review?
No. Compare input range, backplane capacity, chassis position, auxiliary output, fuse, wiring and load calculations for the exact existing supply.
What should be recorded before replacing 1746-P1?
Record the line-voltage selector, input and grounding connections, chassis slot inventory, calculated 5 V and 24 V loads, user-output loads, processor state and active faults.
Why can an SLC 500 chassis restart intermittently after installing 1746-P1?
Check input sags, loose terminals, fuse condition, backplane overload, 24 V load, high-temperature derating and chassis or processor faults.
How should 1746-P1 be commissioned after installation?
Verify the selector and protective earth, measure input and auxiliary output, confirm the backplane load margin, then prove processor scan, I/O health and recovery under an approved test.