Allen Bradley 1756-PBXT ControlLogix XT DC Power Supply

Product Introduction

The Allen-Bradley 1756-PBXT is a ControlLogix XT DC power supply engineered for use in extreme industrial environments. Designed as part of the ControlLogix XT (Extended Temperature) series, this power supply delivers stable backplane power to ControlLogix chassis systems operating in harsh conditions where standard temperature-rated modules may not be suitable.

The 1756-PBXT converts a DC input voltage into regulated backplane power required by ControlLogix controllers, communication modules, and I/O modules. With a 52-watt output capacity, it supports a wide range of system configurations while maintaining consistent voltage regulation and thermal stability.

Built for demanding industries such as oil & gas, mining, power generation, and heavy manufacturing, the XT series ensures reliable performance across expanded temperature ranges. The 1756-PBXT integrates directly into the left side of a ControlLogix chassis and supplies power through the backplane without requiring additional wiring to individual modules.

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Product Specifications

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Applications

• Supplying regulated backplane power to ControlLogix XT systems

• Industrial installations requiring extended temperature operation

• Oil & gas, mining, and heavy industrial automation

• Remote installations exposed to extreme environmental conditions

• Redundant ControlLogix architectures requiring reliable DC power input

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Advantages

• Designed for extended temperature environments under the XT series standard

• Stable 52-watt power output supporting multiple I/O and communication modules

• Wide 18–32 VDC input range for flexible DC system integration

• Integrated protection features improving system safety and reliability

• Direct chassis mounting for simplified installation and wiring

• Compatible with redundant ControlLogix system configurations

FAQ

1. What is the input voltage range of the 1756-PBXT?
   The module operates within an 18–32 VDC input range.

2. What is the maximum output power capacity?
   It provides up to 52 watts of regulated backplane power.

3. Is this power supply suitable for extended temperature environments?
   Yes, it is part of the ControlLogix XT extended temperature series.

4. Can it be used in redundant ControlLogix systems?
   Yes, it supports redundant power supply configurations.

5. How is the module installed?
   It mounts directly to the left side of a ControlLogix chassis.

6. Does it power field devices directly?
   No, it supplies power to the ControlLogix backplane, not directly to field devices.

7. What protection mechanisms are included?
   It includes overvoltage, overcurrent, and thermal protection features.

8. Is additional cooling required?
   The unit is designed for natural convection cooling under specified conditions.

9. Can it operate with standard (non-XT) modules?
   Yes, it can power standard ControlLogix modules within system limits.

10. How is power status monitored?
    A front-panel LED indicator displays operational power status.

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