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    Apter Power sources premium Rockwell Automation hardware, supplying factory-authentic 1756 cables to secure your mission-critical chassis configurations against single points of power failure.

1756-CPR2

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The Allen-Bradley 1756-CPR2 is a 0.91-meter (3.0-foot) factory-molded, heavy-duty cable designed for the ControlLogix platform.
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Technical specifications for 1756-CPR2

  • Manufacturer:
    Allen-Bradley
  • Part Number:
    1756-CPR2
  • Product Family:
    ControlLogix
  • Product Type:
    Redundant Power Supply Power Cable
  • Stock:
    1
  • Cable Length:
    3 feet (0.91 meters)
  • Length:
    10 feet (3 meters)
  • ControlNet Communication Rate:
    5 megabits-second
  • Configuration:
    Redundant
  • Input Current:
    970 milliamps at 5.1 Volts DC, 1.7 milliamps at 24 Volts DC
  • Thermal Dissipation:
    17.4 BTU per Hour
  • Power Dissipation:
    5.1Watts
  • Weight:
    0.6 kg
  • Estimated shipping dimensions:
    7x1.8x92cm
  • 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 Use Cases Certifications & Standards Temperature & Humidity Range

Features:

  • Interface Between the Redundant Power Supply and 1756-PCSA2 Chassis Adapter
  • Combines Capability of Straight Connector Design with Redundant Power Cable Functionality
  • Operates in Conjunction with the ControlLogix System and Standard I/O Modules
The Allen-Bradley 1756-CPR2 Redundant Power Supply Power Cable serves as the dedicated power connection in a ControlLogix chassis, providing reliable DC power transfer between redundant power supplies and the 1756-PCSA2 chassis adapter. It continuously maintains electrical connectivity across its 0.91-meter length with straight connector terminations, ensuring stable power distribution to support steady state operation of all controllers and I/O modules within the rack. Seamless power continuity is standard with the 1756-CPR2, however using it within a Redundant Power Configuration will allow seamless switchover to a backup supply in the event of a primary power failure.

The 1756-CPR2 provides essential connectivity functions common to the entire redundant power path, and is a critical component of the power distribution system, directly affecting the proper, normal operation of the overall ControlLogix system. One or two 1756-CPR2 cables may be utilized per chassis depending on the desired redundancy level. The 1756-CPR2 occupies a dedicated connection point between the redundant power supply and the 1756-PCSA2 adapter, always positioned to ensure optimal signal integrity and minimal voltage drop.

For Dual Redundant Power applications, the ControlLogix System requires the 1756-CPR2 power cable installed between the redundant power supply and the 1756-PCSA2 chassis adapter. In addition to standard single supply operation, the redundant configuration also performs automatic switchover. The 1756-CPR2 dual power configuration executes failover in conjunction with the internal circuitry specified in the redundant power supply options.

The 1756-CPR2 Allen-Bradley Redundant Power Supply Power Cable may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Allen-Bradley 1756-CPR2 Redundant Power Supply Power Cable Manuals,Datasheets,Link 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-CPR2 Redundant Power Supply Power Cable Specs

General

  • Manufacturer Allen-Bradley
  • Model 1756-CPR2
  • Condition New Original ready stock
  • Product Family 1756-CPR2D,1756-CPR2U
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.
  • Redundant Power Integration: The cable is used to connect a ControlLogix redundant power supply, such as the 1756-PA75R or 1756-PB75R, directly to a 1756-PSCA2 chassis adapter.
  • Seamless Power Switchover: It enables dual power supplies to share the load. If one supply loses incoming power or experiences an internal fault, the cable configuration ensures the second supply maintains the system without interrupting the CPU or I/O modules.
  • Mission-Critical Applications: It is deployed in continuous-process industries where an unexpected system shutdown would result in significant financial loss, safety hazards, or equipment damage, such as in oil and gas refining, water treatment, and pharmaceutical manufacturing.
  • c-UL-us Listing: Certified to meet both United States and Canadian safety standards under UL file requirements for industrial control equipment.
  • CE Mark: Complies with all applicable European Union directives, including the Low Voltage Directive and Electromagnetic Compatibility (EMC) standards.
  • RCM / C-Tick: Registered for compliance with Australian and New Zealand radiocommunications and electromagnetic emission requirements.
  • RoHS and REACH: Constructed using materials that restrict the use of hazardous substances, aligning with modern environmental sustainability standards.
  • Operating Temperature: 0°C to 60°C (32°F to 140°F).
  • Storage Temperature: -40°C to 85°C (-40°F to 185°F).
  • Relative Humidity: 5% to 95% non-condensing.
Description
The Allen-Bradley 1756-CPR2 Redundant Power Supply Power Cable is specifically designed to address the critical need for uninterrupted power delivery in ControlLogix automation systems. This 1756-CPR2 cable solves the problem of single-point power failures by establishing a reliable connection between redundant power supplies and the 1756-PCSA2 chassis adapter, ensuring continuous operation even when one power source experiences a fault. The 1756-CPR2 features a straight connector configuration with a 0.91-meter cable length, providing straightforward installation and optimal routing within standard industrial enclosures.

The 1756-CPR2 finds extensive application across industries where system uptime is paramount. In manufacturing facilities, the 1756-CPR2 supports continuous production lines by maintaining power redundancy for ControlLogix controllers managing robotic assembly, material handling, and process control operations. In oil and gas processing plants, the 1756-CPR2 ensures reliable power connectivity for safety instrumented systems and distributed control architectures operating in harsh environments. Water treatment facilities and power generation stations also rely on the 1756-CPR2 to safeguard critical monitoring and control functions where unexpected downtime could result in significant operational disruptions or safety hazards.

For installation and integration, the 1756-CPR2 offers seamless compatibility with existing ControlLogix infrastructure. The straight connector design of the 1756-CPR2 enables quick and secure attachment to the 1756-PCSA2 chassis adapter, minimizing installation time and reducing the risk of connection errors. The 0.91-meter length of the 1756-CPR2 provides adequate flexibility for standard rack configurations while maintaining proper cable management practices. When integrating the 1756-CPR2 into a redundant power architecture, engineers should verify proper seating of the connector and confirm that both primary and backup power paths are fully operational before commissioning the system.
Revisions

Revision Part #

Also known as

1756-CPR2 Ser A
1756-CPR2/A, Series A, Rev A
Alternative Names
1756CPR2 I756-CPR2 I756CPR2 1756-CPR2D 1756-CPR2U
Technical notes
The Allen-Bradley 1756-CPR2 connects a redundant power supply to the 1756-PSCA2 passive chassis adapter, supporting 1.2V, 3.3V, 5.1V, and 24V DC backplane current.
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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 problems does the 1756-CPR2 solve?
The cable helps prevent system downtime caused by primary power supply failures. It supports seamless power transfer, reducing the risk of communication interruptions and data loss.
Where is the Allen-Bradley 1756-CPR2 commonly used?
It is widely used in oil and gas facilities, chemical processing plants, automotive manufacturing, water and wastewater treatment systems, and other industries requiring high system availability.
What should be considered during installation?
The cable requires a minimum bend radius of 12.7 cm (5 inches) to prevent excessive stress. Proper cable routing helps ensure reliable long-term performance.
Is installation clearance important for the 1756-CPR2?
Yes. A minimum clearance of 12.7 cm on the left side of the chassis adapter is recommended to avoid cable strain and simplify installation and maintenance.