AB 1756-PSCA2
AB 1756-PSCA2
AB 1756-PSCA2
AB 1756-PSCA2
AB 1756-PSCA2
AB 1756-PSCA2
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1756-PSCA2

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Allen-Bradley 1756-PSCA2 is a passive ControlLogix chassis adapter that combines power from two supported redundant power supplies into one Series B chassis backplane connection.
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Technical specifications for 1756-PSCA2

  • Manufacturer:
    Allen-Bradley
  • Part Number:
    1756-PSCA2
  • Product Family:
    ControlLogix
  • Product Type:
    Redundant Power Supply Chassis Adapter Module
  • Stock:
    1
  • Current capacity at 1.2 V DC:
    1.5 A
  • Current capacity at 3.3 V DC:
    4 A
  • Current capacity at 5.1 V DC:
    15 A
  • Current capacity at 24 V DC:
    2.8 A
  • Compatible standard supplies:
    1756-PA75R and 1756-PB75R
  • Power cables:
    Two 1756-CPR2, 1756-CPR2D, or 1756-CPR2U cables, selected for the installation
  • Supported chassis:
    ControlLogix Series B chassis documented for redundant-power use
  • Wire category:
    3 on 1756-CPR2 connections
  • Operating temperature:
    0–60 °C
  • Relative humidity:
    5–95% noncondensing
  • Vibration:
    2 g at 10–500 Hz
  • Operating shock:
    30 g
  • Dimensions:
    14.35 × 15.11 × 3.39 cm
  • 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 System Composition Redundancy Limits Commissioning Application
  • Provides the chassis-side connection for a pair of supported ControlLogix redundant power supplies
  • Passively combines the two supply paths into the single power connector on a compatible chassis backplane
  • Carries the documented backplane current capacities at 1.2, 3.3, 5.1, and 24 volts DC

1756-PSCA2 is the ControlLogix chassis adapter used in standard redundant-power configurations.

A complete arrangement uses two compatible redundant power supplies, two appropriate 1756-CPR2-family cables, and one chassis adapter connected to a documented Series B chassis.

The adapter is passive and is not itself a power supply; system redundancy depends on correct supply sizing, cabling, chassis compatibility, annunciation, and maintenance practice.

Availability, condition, price, and shipping time for 1756-PSCA2 are confirmed during quotation.

Allen-Bradley 1756-PSCA2 Redundant Power Supply Chassis Adapter Module 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.

  • A complete redundant-power system requires two compatible power supplies, two redundant-power cables, and one chassis adapter
  • The adapter connects to the single power connector on the ControlLogix chassis backplane
  • Select cable style and routing for the actual enclosure layout and documented installation clearances
  • Redundant supplies can share the chassis load and allow one supply to carry the load after the other path fails
  • The chassis adapter and its connection to the backplane are common elements and are not duplicated
  • Power redundancy does not replace controller, communication, I/O, or process redundancy where those are required
  • Verify the total chassis load against the supported supply and adapter current capacities before energization
  • Test each supply path and annunciator circuit separately under an approved commissioning procedure
  • Inspect cable seating, strain relief, grounding, ventilation, and enclosure clearance before returning the system to service
  • Single-chassis ControlLogix systems requiring redundant AC or DC power-supply paths
  • Two-chassis ControlLogix redundant-power layouts using one adapter and two cables for each chassis
  • High-availability ControlLogix installations where power-supply failure must not interrupt chassis activity
Description
1756-PSCA2 is an Allen-Bradley ControlLogix Series A redundant-power chassis adapter module.

The passive adapter funnels power from two supported redundant supplies through two redundant-power cables to the single power connector on a compatible Series B ControlLogix chassis backplane.

Before installation or replacement, confirm the chassis Series, supply catalog numbers, two cable catalog numbers and routing, load calculation, grounding, mounting clearances, annunciator design, and shutdown procedure.
Revisions

Revision Part #

Also known as

1756-PSCA2 Ser A
1756-PSCA2/A, Series A, Rev A
Alternative Names
1756-PSCA2 1756PSCA2 1756 PSCA2 Allen-Bradley 1756-PSCA2 Rockwell Automation 1756-PSCA2 AB 1756-PSCA2 ControlLogix 1756-PSCA2
Technical notes
1756-PSCA2 is a passive chassis adapter, not a power supply. Verify Series A, a supported Series B chassis, two compatible supplies, two correct CPR2-family cables, chassis load, grounding, routing, and annunciation.
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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 one redundant power supply be replaced while a chassis using Allen-Bradley 1756-PSCA2 remains operational?
Yes. In a nonhazardous area, one redundant power supply can be replaced while the other supply carries the chassis load in nonredundant mode. The 1756-PSCA2 adapter itself is not hot-swappable; both redundant supplies must be turned off before removing the adapter.
Are the power supplies and cables included with Allen-Bradley 1756-PSCA2?
Do not assume they are included. Confirm the quote separately lists two compatible supplies and two correct 1756-CPR2-family cables.
Can Allen-Bradley 1756-PSCA2 be used with any ControlLogix chassis?
No. Verify the exact chassis catalog number and Series against the current Rockwell redundant-power documentation before installation.
Does Allen-Bradley 1756-PSCA2 make the entire ControlLogix system redundant?
No. It addresses power-supply redundancy only; the adapter, chassis, controller, network, I/O, and field power remain separate design considerations.
How should an Allen-Bradley 1756-PSCA2 redundant system be commissioned?
Verify the load calculation, then test each supply path and annunciator circuit separately under a controlled procedure without exceeding chassis limits.
What should be inspected when an Allen-Bradley 1756-PSCA2 system reports a power fault?
Inspect both supplies, AC or DC inputs, annunciator outputs, CPR2-family cables, connectors, adapter seating, chassis load, temperature, and grounding.
What information is needed before replacing Allen-Bradley 1756-PSCA2?
Record the adapter Series, chassis catalog and Series, both supply models, both cable models and routing, load calculation, annunciator wiring, and approved shutdown plan.

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