Allen-Bradley 1769-PB2 CompactLogix Power Supply | Replacement, Equivalent & Selection Guide
The Allen-Bradley 1769-PB2 is a 24VDC input power supply designed for the CompactLogix 1769 I/O system. It provides regulated power to the local I/O bus and supports hot-swap capability within the CompactLogix platform. At Konmask.com, we supply genuine and compatible units with full traceability for industrial automation projects worldwide.
Technical Specifications
- Part Number: 1769-PB2
- Manufacturer: Allen-Bradley / Rockwell Automation
- Series: CompactLogix 1769
- Input Voltage: 24VDC (18–32VDC operating range)
- Output Current: 2A @ 5VDC (I/O bus)
- Power Consumption: 48W max
- Operating Temperature: 0–60°C (32–140°F)
- Mounting: DIN rail or panel mount via 1769 bus connector
- Certifications: UL, CE, cUL
- Weight: ~500g
- Form Factor: 1769 compact I/O module width
Compatible Replacement & Equivalent Models
The following models are commonly evaluated as replacements or equivalents for the 1769-PB2. Always verify electrical and mechanical compatibility before substitution:
- 1769-PA2 – Allen-Bradley CompactLogix 120/240VAC input power supply; same bus output, different input voltage
- 1769-PB4 – Allen-Bradley 24VDC input, 4A output; higher current capacity drop-in upgrade
- 1769-PA4 – Allen-Bradley 120/240VAC input, 4A output; AC equivalent with higher current
- 1769-PB2L – Allen-Bradley 24VDC input, left-end mount variant for specific chassis configurations
- Third-party compatible units – Select industrial power supply manufacturers offer 1769-bus-compatible modules; confirm bus connector pinout and output regulation specs before use
Why Choose the Original 1769-PB2
- Factory-guaranteed compatibility with all 1769 CompactLogix I/O modules
- Rockwell Automation firmware and diagnostics integration
- Full UL/CE certification for regulated industries (food, pharma, energy)
- Supported by Rockwell TechConnect and global service network
- Predictable lifecycle and long-term spare parts availability
Typical Applications
- Machine automation and OEM control panels
- Conveyor and material handling systems
- Packaging line PLC control cabinets
- Water/wastewater treatment SCADA panels
- Building automation and HVAC control systems
- Automotive assembly line controllers
System Compatibility
The 1769-PB2 is compatible with the following Allen-Bradley CompactLogix controllers and I/O modules when used as the local bus power supply:
- 1769-L16ER-BB1B, 1769-L18ER-BB1B, 1769-L24ER-QB1B (CompactLogix 5370 L1/L2)
- 1769-L30ER, 1769-L33ER, 1769-L36ERM (CompactLogix 5370 L3)
- All 1769 digital and analog I/O modules (1769-IQ16, 1769-OB16, 1769-IF4, etc.)
- 1769 communication modules (1769-SM1, 1769-SM2, etc.)
Note: Not compatible with MicroLogix 1100/1400 or ControlLogix 1756 platforms.
Selection Guide
Use the table below to select the correct 1769 power supply for your application:
- 24VDC input + 2A bus current needed → 1769-PB2 (this model)
- 24VDC input + 4A bus current needed → 1769-PB4
- 120/240VAC input + 2A bus current needed → 1769-PA2
- 120/240VAC input + 4A bus current needed → 1769-PA4
- Left-end mount required → 1769-PB2L or 1769-PA2L
To calculate required bus current: sum the 5VDC bus current draw of all connected 1769 I/O modules (refer to each module’s datasheet). Add 10–15% margin and select the next power supply tier.
Quality Assurance & Sourcing
- All units sourced from authorized distributors or verified surplus channels
- Pre-shipment inspection: visual, label verification, and functional check
- Anti-static packaging with humidity indicator cards
- Traceability documentation available on request (COC, test reports)
- Warranty: 12 months from shipment date
How to Order
- Confirm your input voltage (24VDC or AC) and required bus current (2A or 4A)
- Verify chassis end-mount orientation (standard right-end or left-end)
- Add 1769-PB2 to cart or contact us for bulk/project pricing
- Provide your project timeline — expedited shipping available
- Request a formal quotation: support@konmask.com
Replacement & Compatibility FAQ
Q: Can I replace a 1769-PB2 with a 1769-PB4?
A: Yes. The 1769-PB4 is a direct upgrade — same 24VDC input, higher 4A output. It fits the same bus slot with no wiring changes.
Q: Is the 1769-PB2 compatible with CompactLogix 5380 (1769-L3x)?
A: The 5380 series uses a different I/O bus architecture. Verify your controller catalog number before ordering.
Q: Can I use a third-party 24VDC power supply instead?
A: Third-party units may power the 24VDC input rail, but the 1769-PB2 module itself provides the regulated 5VDC I/O bus — this function cannot be replaced by a generic DIN rail PSU.
Q: What is the lead time for the 1769-PB2?
A: In-stock units ship within 1–3 business days. Contact us for current availability.
Q: Do you provide a certificate of conformance?
A: Yes, COC and inspection reports are available upon request at no additional charge.
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