1756-PBXT ControlLogix Allen Bradley Extended Temperature DC Power Supply

Product Overview

The Allen Bradley 1756-PBXT provides regulated DC power to ControlLogix I/O modules and processors within a 1756 chassis. As part of the "XT" (Extended Temperature) line, this module utilizes conformal coating and high-grade thermal components to operate in environments that exceed the limits of standard industrial hardware. It converts a 24V DC source into the specific backplane voltages required for complex automation tasks. We supply this unit as 100% Brand New and original factory equipment, ensuring your mission-critical systems receive clean, stable power without compromise.

Technical Specifications

The 1756-PBXT delivers high-wattage output while maintaining strict isolation standards.

Engineering Advantages

• Extreme Thermal Resilience: The "XT" designation guarantees stable performance across an extended temperature range. This module eliminates the need for expensive enclosure cooling systems in hot processing zones or remote outdoor cabinets.

• Contamination Protection: Allen Bradley applies a conformal coating to the internal circuitry of the 1756-PBXT. This layer shields the module against moisture, dust, and chemical contaminants, preventing dendritic growth and short circuits in harsh industrial atmospheres.

• Robust Input Range: The module accepts a wide input window (18–32V DC). This flexibility compensates for voltage drops in long DC cable runs and maintains system stability during battery discharge cycles in backup power scenarios.

• High Isolation Integrity: Featuring 250V continuous isolation, the power supply decouples the incoming DC source from the sensitive backplane electronics. This barrier prevents ground loops and protects expensive CPU modules from external electrical surges.

FAQs

• Can I use the 1756-PBXT in a standard ControlLogix chassis?

  Yes. The 1756-PBXT maintains physical compatibility with all standard 1756 chassis. However, to realize the full "Extended Temperature" benefits, you should pair it with other XT-rated components and chassis.

• How does this differ from the standard 1756-PB72?

  The 1756-PBXT features specialized components and coating for extreme environments. While the power specifications are similar, the XT version survives harsher chemical and thermal conditions where a standard PB72 might fail prematurely.

• Does the unit require a specific fuse for the input side?

  Yes. We recommend installing external overcurrent protection. Directing the 24V DC through a properly rated circuit breaker or fuse prevents damage to the module during a catastrophic external power fault.

• Is this product 100% Brand New?

  Absolutely. We ship only Brand New units in original Allen Bradley packaging. Each module carries the original UPC (612598554782) and factory serial numbers.