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1756-A4

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The Allen-Bradley 1756-A4 is a four-slot, horizontally mounted ControlLogix standard chassis with a 4 W maximum chassis power dissipation.
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Technical specifications for 1756-A4

  • Manufacturer:
    Allen-Bradley
  • Part Number:
    1756-A4
  • Product Family:
    ControlLogix
  • Product Type:
    Allen-Bradley 1756-A4 4-Slot ControlLogix Chassis
  • Stock:
    1
  • Slots:
    4
  • Power Dissipation:
    4 W max
  • Mounting Method:
    Horizontal only
  • Location:
    Panel
  • Minimum Cabinet Size:
    50.8 x 50.8 x 20.3 cm
  • Backplane Current at 5.1V DC:
    15 A chassis / 6 A slot max
  • Backplane Current at 24V DC:
    2.8 A chassis / slot max
  • Operating Temperature:
    0 to 60 C
  • Weight:
    0.75 kg
  • Estimated shipping dimensions:
    Product dimensions: 16.9 x 18.6 x 14.48 cm (H x W x D).
  • Tariff Code:
    8537101190
  • 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 Specifications Compact Layout Slot Plan Grounding Review

Features:

  • •Four-slot standard ControlLogix backplane
  • •Horizontal panel mounting with left-side power supply
  • •Compact minimum cabinet recommendation for focused systems

1756-A4 provides a compact four-position backplane for a tightly scoped ControlLogix assembly.

The final design should reserve every required controller and communication position before the enclosure layout is released.

Panel planning must retain horizontal mounting, left-side power-supply space, grounding paths, and module service clearance.

Availability is subject to Apter Power's current inventory and sourcing confirmation.

Verified resources for Allen-Bradley 1756-A4:

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.

Allen-Bradley 1756-A4 4-Slot ControlLogix Chassis Specs

General

  • ManufacturerAllen-Bradley
  • Model1756-A4
  • ConditionNew Original ready stock
  • Product FamilyControlLogix

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.

Compact panel layout

  • •Four-slot scope: Reserve positions for every required controller and communication module.
  • •Panel envelope: Check the official minimum cabinet recommendation and module depth.
  • •Power position: Allow left-side space for the selected ControlLogix power supply.
  • •Service clearance: Keep wiring and removal access in the final enclosure drawing.

Four-slot allocation review

  • •Controller position: Document the controller slot used by the validated project.
  • •Network position: Include required communication modules in the four-slot count.
  • •Future demand: Decide whether spare capacity is needed before choosing this chassis.
  • •Drawing control: Match labels, slot numbers, and project documentation.

Grounding and mounting review

  • •Mounting direction: Install the standard chassis horizontally.
  • •Functional earth: Plan the specified functional-earth conductor.
  • •Protective earth: Retain the protective-earth connection in the panel design.
  • •Final inspection: Verify mounting hardware and ground continuity before power-up.
Description
The Allen-Bradley 1756-A4 is the compact four-slot standard chassis for ControlLogix modules. Its backplane distributes power and provides the communication path between installed modules.

The Allen-Bradley 1756-A4 mounts horizontally in a panel and has a minimum cabinet recommendation of 50.8 x 50.8 x 20.3 cm. The standard power supply mounts at the left side.

The Allen-Bradley 1756-A4 is suited to tightly scoped ControlLogix assemblies where the final slot map, power budget, grounding, and future expansion requirement are reviewed before procurement.
Revisions

Revision Part #

Also known as

1756-A4 Ser B
1756-A4/B, Series B, Rev B
1756-A4 Ser C
1756-A4/C, Series C, Rev C
Alternative Names
1756A4 1756 A4 AB 1756-A4 Allen Bradley 1756-A4 Rockwell 1756-A4 ControlLogix 1756-A4 1756-A4 chassis ControlLogix 4-slot chassis
Technical notes
The Allen-Bradley 1756-A4 is a four-slot, horizontally mounted ControlLogix standard chassis with a 4 W maximum chassis power dissipation. Confirm the installed chassis, series, power architecture, and module context 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.
When is Allen-Bradley 1756-A4 a practical chassis choice?
It suits a compact ControlLogix build when four slots cover the confirmed module list and planned service margin.
What should be checked before ordering a 1756-A4 chassis?
Confirm the slot map, selected 1756 power supply, horizontal panel space, grounding conductors, module depth, and expansion plan.
Where is the power supply installed relative to 1756-A4?
Rockwell Automation specifies the standard power supply on the left side of the 1756 chassis.
How should a buyer avoid outgrowing 1756-A4?
Review required modules, communication adapters, spare slots, and future I/O additions before fixing the four-slot chassis size.
What installation records help replace 1756-A4 correctly?
Provide the chassis series, power supply, installed slot map, enclosure drawing, grounding arrangement, and required quantity.
How can Apter Power support a 1756-A4 quote?
Send the model, series, quantity, destination, and planned ControlLogix slot map for sourcing and compatibility review.

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