1769-PB2 24VDC CompactLogix Power Supply Allen-Bradley Unit

Engineering Overview & System Architecture

The **1769-PB2** is a high-performance DC power supply module engineered specifically for the **CompactLogix** controller platform by **Allen-Bradley** (Rockwell Automation). Designed to energize distributed expansion I/O banks, the **1769-PB2** delivers stable low-voltage DC power across both left and right modular connection rails while maintaining strict electrical isolation.

Core Technical Specifications

Operational Modes & System Compatibility

• Module Distance Rating: Supports a distance rating of 8, enabling up to 8 expansion modules to connect on the left side and 8 on the right side for a maximum capacity of 16 modules.
• Series A and Series B platform compatibility across standard CompactLogix architecture layouts.
• Integrated internal protection featuring factory-installed replaceable fuses (Wickmann 19193-6.3A / Littelfuse 021706.3MXP).
• Line loss ride-through capability ranging from a minimum of 10 milliseconds up to 10 seconds under nominal loads.

Installation Guidelines & Commissioning Convenience

• Mount the unit securely using standard DIN rail attachment or direct panel mounting tabs inside an appropriate protective enclosure.
• Utilize solid or stranded copper wire sized between 22 and 14 AWG with a 90°C thermal insulation rating for primary power connections.
• Verify barrier-type terminal block connections against printed terminal identification diagrams before energizing the 24VDC supply line.
• Inspect finger-safe terminal covers to ensure accidental contact protection is fully engaged prior to system startup.

Diagnostic Capabilities & Industrial Applications

• Fault Protection: Built-in surge and overcurrent protection mechanisms safeguard connected backplane rails against transient voltage spikes.
• Environmental Resilience: Withstands operating vibration up to 5G at 10-500 Hz and 30G operating shock parameters.
• Target Applications: Deployed extensively in discrete manufacturing machinery, automated packaging systems, skid-mounted water pumps, and material handling conveyor controls.

Global PLC Spare HUB's Insight

Automation technicians deploying the **1769-PB2** power supply frequently overlook cumulative 5VDC current draws when expanding near the 16-module limit. During a recent automotive assembly line troubleshooting session, our engineering team resolved intermittent processor reboots by redistributing heavy sensor loads to an auxiliary **1769-PB2** unit, eliminating voltage sag across the backplane bus.

Logistics, Packaging & Warranty Terms

• Package Inclusion: 1x **1769-PB2** CompactLogix DC Power Supply Module.
• Fulfillment Schedule: Fast 24 to 48-hour order processing and dispatch.
• Global Couriers: Secure worldwide shipping handled via FedEx, UPS, and DHL.
• Warranty Assurance: Fully backed by a comprehensive 12-month operational warranty.

Frequently Asked Questions (FAQ) & Buying Guide

Q: How many total I/O modules can a single 1769-PB2 power supply energize?

A: It supports a maximum of 16 expansion modules, with a distance rating allowing up to 8 modules connected on the left side and 8 modules on the right side.

Q: What wire size and temperature rating are required for the input power terminals?

A: Use solid or stranded copper wire sized between 22 and 14 AWG (specifically 14 AWG recommended) rated for 90°C (194°F) or greater.

Q: What action should be taken if the internal fuse trips due to a power surge?

A: Replace the blown fuse with an identical manufacturer-approved model, such as the Wickmann 19193-6.3A or Littelfuse 021706.3MXP.

Q: Does this power supply support both DIN rail and direct panel mounting methods?

A: Yes, the unit is engineered to support both standard DIN rail installation and direct backplate mounting using its upper and lower panel mounting tabs.

Q: Buying Guide: When should I add a second power supply to my CompactLogix rack?

A: Integrate an additional **1769-PB2** when your total 5VDC current draw exceeds 2.0 Amps or your 24VDC auxiliary load surpasses 0.8 Amps across the expansion bank.

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