Allen-Bradley 1756-PB75

 

Introduction:

The Allen-Bradley 1756-PB75 ControlLogix Power Supply is a premium industrial-grade DC power module engineered and manufactured 100% in Mexico by Rockwell Automation. Designed specifically for the high-end ControlLogix hardware architecture—a prominent automation platform tasked with handling large-scale distributed plant processes—this power module serves as the functional cornerstone of the system. It filters and regulates incoming electrical currents to provide clean, uncompromised backplane power to critical processing cores and interconnected I/O structures.

The 1756-PB75 model operates on an industry-standard 24VDC power infrastructure, efficiently converting input current into multiple low-voltage, high-capacity backplane channels ($5.1\text{ V}$, $1.2\text{ V}$, $3.3\text{ V}$, and $24\text{ V}$ DC). Featuring a specialized modular form factor, it mounts seamlessly onto the left side of any standard 1756 ControlLogix chassis without occupying valuable controller slots. Equipped with built-in overvoltage protection, short-circuit containment, and optimized thermal dissipation, this Allen-Bradley power supply ensures continuous system runtime and safeguards against voltage sag incidents that threaten expensive factory floor downtime.

Key Features & Technical Specifications:

  • Manufacturer: Allen-Bradley / Rockwell Automation

  • Product Series: ControlLogix Power Supplies Family

  • Model Code: 1756-PB75

  • Device Type: Chassis-Mounted PLC System Power Supply Module

  • Input Voltage Margin: 24V DC nominal (Sustains operational stability across a broad $18 \dots 32\text{ V}$ DC range).

  • Backplane Output Current Capacity: 13 A at $5.1\text{ V}$ DC; 2.8 A at $3.3\text{ V}$ DC; 2.8 A at $24\text{ V}$ DC.

  • Circuit Protection Arrays: Integrated overcurrent throttling, localized overvoltage protection, and superior galvanic barrier isolation.

  • Mechanical Integration: Side-loading layout designed for flush left-hand installation on standard 1756 chassis racks, leaving all primary slots available for functional modules.

  • Country of Origin: 100% Made in Mexico.