AB 1746-A4
AB 1746-A4
AB 1746-A4
AB 1746-A4
AB 1746-A4
AB 1746-A4
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  • Lifecycle status

    Discontinued
    Discontinued date: 2024-03-31
    Replacement category: No planned RA replacement

1746-A4

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Allen-Bradley 1746-A4 is a four-slot SLC 500 modular chassis that houses a compatible processor, I/O modules and power supply for compact control stations.
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Technical specifications for 1746-A4

  • Manufacturer:
    Allen-Bradley
  • Part Number:
    1746-A4
  • Product Family:
    SLC 500
  • Product Type:
    SLC 500 4-Slot Modular Chassis
  • Stock:
    1
  • Module slots:
    4
  • Hardware style:
    Modular
  • Cooling method:
    Convection
  • Operating temperature:
    0 to 60°C
  • Dimensions:
    17.7 × 17.1 × 14.5 cm
  • Installation instructions:
    1746-IN016
  • Maximum backplane current:
    5.1 V DC at 10 A; 24 V DC at 2.88 A
  • Mounting type:
    Panel mount
  • Storage temperature:
    -40 to +85°C
  • Relative humidity:
    5 to 95%, non-condensing
  • Weight:
    0.75 kg
  • Tariff Code:
    8538900000
  • 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 Slot Layout Installation Compatibility Application
  • Provides four SLC 500 module positions
  • Uses a modular SLC 500 power-supply and I/O architecture
  • Requires enclosure sizing from the completed chassis configuration

Allen-Bradley 1746-A4 is the four-slot chassis for compact SLC 500 modular stations.

Selection depends on the processor or communication adapter, I/O count and side-mounted power supply required by the machine.

Before installation, confirm backplane condition, module keying, grounding, enclosure clearance and the power calculation for the complete station.

Availability, condition, price, and shipping time for 1746-A4 are confirmed during quotation.

Allen-Bradley 1746-A4 SLC 500 4-Slot Modular Chassis 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.

  • Reserve the four slots for compatible SLC 500 processors, adapters and I/O modules
  • Keep the documented slot order used by the controller project
  • Confirm connector condition before transferring installed modules
  • Mount the chassis in an enclosure sized for the completed hardware
  • Provide convection clearance and protective grounding
  • Fit the compatible SLC 500 power supply at the chassis side
  • Use only compatible 1746 modular hardware
  • Verify the controller project matches the physical slot arrangement
  • Calculate supply loading from every installed module
  • Compact SLC 500 machine-control stations
  • Small distributed SLC 500 I/O stations
  • Four-slot retrofit panels retaining documented SLC 500 modular hardware
Description
Allen-Bradley 1746-A4 provides four module positions for a compact SLC 500 modular control station.

Its backplane distributes power and communication between the installed SLC processor or adapter and the selected 1746 I/O modules, while the power supply mounts at the chassis side.

The chassis is used where a small local or distributed SLC 500 station is required and the final enclosure, power and heat design are based on the installed modules.
Revisions

Revision Part #

Also known as

1746-A4 Ser A
1746-A4/A, Series A, Rev A
1746-A4 Ser B
1746-A4/B, Series B, Rev B
Alternative Names
1746-A4 1746 A4 1746A4 Allen-Bradley 1746-A4 Allen Bradley 1746-A4 Allen-Bradley 1746 A4 Allen Bradley 1746 A4 Rockwell Automation 1746-A4 SLC 500 1746-A4 Allen-Bradley SLC 500 1746-A4
Technical notes
Allen-Bradley 1746-A4 is the four-slot SLC 500 chassis, not a processor or power supply. Preserve the installed slot map and recalculate backplane loading 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.
Can any SLC 500 module be installed in any slot of Allen-Bradley 1746-A4?
No. In the primary chassis, slot 0 is reserved for the processor or communication adapter. Install only supported I/O or specialty modules in the remaining slots and verify each module’s placement and 5 V/24 V backplane load.
Which power supply should be selected for Allen-Bradley 1746-A4?
Choose a compatible 1746 modular power supply only after calculating the total 5 V and 24 V backplane current required by every installed module.
Can Allen-Bradley 1746-A4 replace a larger SLC 500 chassis without project changes?
Not automatically. The four-slot limit can change module order, I/O addressing and power-supply loading, so the project and field wiring must be redesigned and verified.
Why can modules in Allen-Bradley 1746-A4 remain inactive after a chassis replacement?
Check the backplane connectors, power-supply seating, processor position, module seating and physical slot order against the saved controller project.
What enclosure checks matter before installing Allen-Bradley 1746-A4?
Confirm that the completed station fits the required enclosure space and provides adequate convection clearance, protective grounding and cable-bend room.
What should be documented before replacing Allen-Bradley 1746-A4?
Record the chassis catalog number, installed power supply, every module and slot, wiring labels, grounding arrangement and the verified SLC project backup.
How should Allen-Bradley 1746-A4 be validated after installation?
Verify the power-supply rails, module recognition, slot addressing, I/O operation and controller diagnostics before running a controlled machine cycle.