Allen-Bradley 1756-PSCA2 Redundant Power Supply Chassis Adapter

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Allen-Bradley 1756-PSCA2 Redundant Power Supply Chassis Adapter  

Product Description

Detailed Parameters

• Compatible Chassis: Compatible with ControlLogix 1756 series chassis, supporting 5-slot, 7-slot, 10-slot, 13-slot and other specifications, occupying 2 adjacent slots of the chassis (usually the leftmost slots).
• Supported Power Modules: Adapts to redundant power modules such as 1756-PA72 (AC input) and 1756-PB72 (DC input), supporting AC/DC hybrid redundant configuration.
• Switching Performance: Power failure switching time ≤5ms, undisturbed switching, ensuring uninterrupted power supply for controllers and I/O modules.
• Mechanical Structure: Adopts metal frame design, built-in power distribution copper bars, electrically connected to the chassis backplane bus, weight approximately 0.8kg.
• Status Indication: Equipped with 2 power operation indicators (corresponding to two power modules) and 1 redundant status indicator (green steady on indicates normal redundancy, red flashing indicates single power operation).
• Operating Environment: Operating temperature 0℃~60℃, storage temperature -40℃~85℃, relative humidity 5%~95% (non-condensing), protection class consistent with the chassis (IP20).
• Installation Requirements: Must be mechanically locked with the ControlLogix chassis, installation torque 0.5~0.6Nm, ensuring reliable electrical connection.
• Certification Standards: UL 508, CSA C22.2 No.14, CE certified, compliant with IEC 61131-2 industrial control equipment standards.

Advantages and Features

• Seamless Redundant Switching: ≤5ms switching time ensures undisturbed system operation in case of power failure, avoiding interruption of critical control processes (such as temperature and pressure control loops of chemical reactors).
• Flexible Power Adaptation: Supports AC/DC power module hybrid redundancy, configurable according to on-site power types (such as UPS DC power + mains AC power), improving the anti-risk capability of the power supply system.
• Integrated Design: Occupies 2 slots of the chassis directly, no need for additional external switching devices, simplifying system wiring and structure, saving control cabinet space.
• Intuitive Status Monitoring: Independent power operation and redundancy status indicators, combined with diagnostic functions of the ControlLogix system, enable quick judgment of power redundancy status and fault location.
• High Reliability Guarantee: Metal frame and copper bar connection design improve mechanical strength and conductivity, adapting to vibration and temperature fluctuations in industrial environments, with mean time between failures (MTBF) ≥10⁶ hours.

Application Fields

• Chemical Process Control: In ControlLogix systems of continuous reactors and distillation columns, redundant power configuration ensures uninterrupted temperature and pressure control loops, avoiding production accidents.
• Power System Automation: Used in control units of substation monitoring systems (SCADA), ensuring power supply reliability for relay protection and circuit breaker control, meeting the "zero downtime" requirement of the power industry.
• Semiconductor Manufacturing Equipment: In control systems of lithography and etching equipment, supports power redundancy to maintain nanoscale processing accuracy, preventing product scrapping caused by power fluctuations.
• Water Treatment Plant Core Control: Used in sludge treatment and water quality monitoring systems of wastewater treatment plants, ensuring continuity of environmental protection index monitoring and control, avoiding the risk of excessive discharge.
• Large Metallurgical Equipment: In automation control systems of blast furnaces and converters, resists the impact of power grid fluctuations, ensuring stable power supply for the smelting process.

Notes

• Before installation, confirm chassis slot compatibility; 1756-PSCA2 must be installed in dedicated slots (usually slots 1 and 2) of the chassis that support redundant power supplies, and must not occupy controller or I/O module slots.
• Input power supplies of the two power modules must come from different circuits (such as different UPS or different distribution cabinets) to avoid common-cause failures (such as mains interruption affecting both power supplies simultaneously).
• The mechanical locking between power modules and adapters must be firm; after installation, check whether the copper bar connections are tight to prevent local overheating due to poor contact.
• Before system power-on, confirm the redundancy status through RSLogix 5000 software to ensure that the "Redundant Power" status is "Normal" and the switching logic is normal.
• Regularly (quarterly recommended) check indicator status and power output voltage, clean dust on the adapter surface to maintain heat dissipation, avoiding the impact of high-temperature environments on switching performance.

The structure and details of the product：

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