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The 1756-CPR2 is a dedicated heavy-duty industrial interconnect cable engineered exclusively for high-availability ControlLogix Redundant Power Supply Systems. Measuring precisely 0.91 meters (3 feet) in length, this cable features heavy-duty straight connectors at both ends.
Provides a secure electrical connection to bridge the standard 1756 power supply to the redundant chassis adaptersl
Enables active power balancing and allows hot swapping of faulty power supply modules without stopping the industrial processor
Extremely low operational power consumption and extended lifespanFeatures a specific 3-foot length and heavy-duty industrial connectors designed to fit inside the standard ControlLogix redundant power enclosures
It serves as the vital physical and electrical bridge designed to channel combined electrical current directly from remotely mounted redundant power supply modules to the 1756-PSCA2 Redundant Power Supply Chassis Adapter. By funneling balanced current smoothly onto the ControlLogix backplane, this cable ensures uninterrupted system operation even during complete power module failures.
This cable is for ControlLogix systems. Control systems utilizing this power architecture reduce development and maintenance time during both commissioning and normal operation through the integration of the programming software, controller, and I/O modules. The architecture supports standard and safety control within the same chassis to achieve a highly integrated system. Users can utilize the high-availability and extreme environment capabilities of this platform to meet stringent field application requirements and maintain the continuous operation of industrial production lines.
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
Allen Bradley 1756-CPR2 ControlLogix Redundant Power Supply Cable Manuals, Datasheets, Drivers, 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.
Petrochemical and Refining
Connects redundant power paths on continuous control chassis for cracking furnaces or distillation columns to maintain zero-downtime switching of field valve control and temperature monitoring power.
Thermal and Nuclear Power Generation
Transmits redundant backplane current in steam turbine control systems or boiler auxiliary protection systems to ensure continuous data acquisition of critical operational metrics for large generator units.
Pharmaceutical and Vaccine Production
Transmits high-availability backplane power in core control cabinets for bio-fermentation tanks or sterile filling lines to prevent scrapping entire batches of high-value medicine due to power failure.
Semiconductor and Wafer Manufacturing
Connects redundant power lines in PLC control systems for cleanroom utility auxiliary systems or valve manifold boxes VMB to maintain the continuous operation of critical process environments.
Iron and Steel Smelting and Blast Furnace Control
Transmits current within the power chains of blast furnace charging systems or continuous casting control systems to withstand onsite high temperatures and electromagnetic interference while maintaining control backplane voltage stability.
First, the cable must never be bent at a sharp 90-degree angle during panel wiring; a strict minimum bend radius of 12.7 centimeters must be maintained to prevent metal fatigue and fracturing of the internal multi-strand copper power cores and shielding layer.
Second, a standard dual-power redundant chassis setup cannot be established with just a single cable, as each external redundant power supply unit requires its own independent 1756-CPR2 cable to connect to the 1756-PSCA2 adapter, meaning they must be purchased in pairs for onsite deployment.
Lastly, although the redundant power supplies themselves support hot-swapping, when plugging, unplugging, or maintaining this cable, you must ensure that the locking mechanisms on both straight connectors are mechanically self-locked into position, and strictly prevent conductive dust or oil contamination on the multi-pin industrial plugs to avoid poor contact that could cause instantaneous current overloads or current-sharing signal interruptions, which would drop a single-side power supply offline.
The Allen-Bradley 1756-CPR2 is a 0.91-meter straight redundant power supply cable for ControlLogix PLC systems. It connects external redundant power supplies (e.g., 1756-PA75R) to the chassis-side 1756-PSCA2 adapter, transmitting DC power and current-sharing signals for microsecond-level seamless power switching. Featuring low-impedance contacts and a flame-retardant jacket, it requires a 12.7 cm bend radius during wiring, serving as a critical component for uninterrupted physical power redundancy in PLC control networks.
It is a redundant power supply interconnect cable for the Rockwell Allen-Bradley ControlLogix system. It transmits DC current from redundant power supplies. Its standard length is 0.91 meters (3 feet).
How do you properly assemble or use a cable like the 1756-CPR2?
You connect one end of the cable to the remotely mounted redundant power supply supply. Connect the other end to the 1756-PSCA2 redundant chassis adapter mounted on the left side of the chassis. Plug it in firmly and tighten the locking screws.
What is the connector shape at both ends of the 1756-CPR2?
It features straight connectors at both ends. It is suitable for straight-through wiring spaces inside control cabinets.
Does the 1756-CPR2 cable transmit alternating current or directing current internally?
It transmits low-voltage direct current DC internally. It routes the converted 5.1V DC and 24V DC currents from the power supply supply to the PLC chassis backplane. It does not connect directly to the external main AC power supply.
How many 1756-CPR2 cables can we use in a single ControlLogix system?
It depends on your redundant configuration. One 1756-PSCA2 chassis adapter features two cable slots. This means you can connect two of these cables. Each corresponds to an independent redundant power supply supply.
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