Allen-Bradley 1756-PB50 24VDC Input Power Supply Module – ControlLogix Series
When a ControlLogix chassis loses its power supply, the entire control system goes dark — PLCs stop scanning, I/O modules drop offline, and production lines halt without warning. In process-critical environments such as oil & gas, automotive assembly, and water treatment, even seconds of unplanned downtime translate into significant financial loss and safety risk. The Allen-Bradley 1756-PB50 is the backbone that keeps your ControlLogix system energized and your operations running without interruption.
Within the 1756 ControlLogix platform — Rockwell Automation’s flagship modular PLC architecture — the 1756-PB50 occupies a foundational role as a 24VDC input, 50W output power supply module. Designed for demanding industrial environments, it delivers stable, regulated power to the ControlLogix chassis backplane, supporting up to 10-slot configurations. Its global installed base spans thousands of facilities across manufacturing, energy, and infrastructure sectors, making it one of the most widely deployed power supply modules in industrial automation history.
Technical Specifications
- Part Number: 1756-PB50
- Series: ControlLogix 1756
- Manufacturer: Allen-Bradley / Rockwell Automation
- Input Voltage: 18–32 VDC (24VDC nominal)
- Output Power: 50W
- Backplane Current: 5V @ 10A (max)
- Operating Temperature: 0°C to 60°C (32°F to 140°F)
- Storage Temperature: -40°C to 85°C
- Relative Humidity: 5% to 95% non-condensing
- Certifications: UL, CE, CSA, C-Tick
- Mounting: ControlLogix 1756 chassis (any slot)
- Form Factor: Single-slot module
Key Features & Benefits
- 24VDC Input Compatibility: Ideal for facilities with 24VDC plant power distribution, eliminating the need for additional AC-DC conversion stages.
- 50W Regulated Output: Provides sufficient power for fully populated ControlLogix chassis with mixed I/O and communication modules.
- Hot-Swap Capable: Supports removal and insertion under power (RIUP) when used with a redundant power supply configuration, minimizing maintenance downtime.
- Status Indicators: Onboard LED diagnostics for power OK and fault conditions, enabling rapid field troubleshooting.
- Compact Single-Slot Design: Maximizes chassis slot availability for I/O and processor modules.
- Wide Operating Range: Tolerates input voltage fluctuations from 18V to 32V, ensuring stability in environments with variable DC bus quality.
- Global Certifications: UL, CE, CSA, and C-Tick approvals support deployment in North America, Europe, Asia-Pacific, and beyond.
Industry & Equipment Applications
- Oil & Gas: Pipeline SCADA systems, compressor control panels, wellhead automation
- Automotive Manufacturing: Robotic welding cells, conveyor control, paint shop automation
- Water & Wastewater: Pump station control, SCADA-integrated treatment plant PLCs
- Food & Beverage: Packaging line controllers, CIP system automation
- Pharmaceutical: Batch process control, cleanroom automation systems
- Power Generation: Turbine control panels, substation automation
- Mining: Conveyor drive control, crusher automation, ventilation systems
System Integration & Compatible Parts
The 1756-PB50 is designed to operate within the Allen-Bradley ControlLogix 1756 ecosystem. Compatible and commonly paired components include:
- Chassis: 1756-A4, 1756-A7, 1756-A10, 1756-A13, 1756-A17
- Processors: 1756-L61, 1756-L62, 1756-L63, 1756-L71, 1756-L72, 1756-L73
- Redundant Power Supply: 1756-PSCA2 (power supply chassis adapter for redundancy)
- Digital I/O: 1756-IB16, 1756-OB16E, 1756-IA16
- Analog I/O: 1756-IF8, 1756-OF8
- Communication Modules: 1756-EN2T (EtherNet/IP), 1756-DNB (DeviceNet), 1756-CN2 (ControlNet)
Our Quality Assurance Process
At Konmask.com, every Allen-Bradley 1756-PB50 unit we supply undergoes a rigorous multi-stage verification process before shipment:
- Authenticity Verification: Visual inspection of labeling, date codes, and manufacturer markings against known-genuine references.
- Functional Pre-Check: Where applicable, modules are bench-tested for power output and LED indicator response.
- Packaging Integrity: Anti-static packaging with moisture barrier bags and shock-absorbing foam inserts for safe international transit.
- Documentation: Each shipment includes a packing list with part number, serial/lot reference, and condition declaration (new, surplus, or refurbished clearly stated).
- Traceability: All units are logged in our inventory system with source traceability records available upon request.
How to Order
- Submit an inquiry via our Request a Quote form on this page, or email support@konmask.com.
- Provide your required quantity, preferred condition (new / surplus new / refurbished), and target delivery timeline.
- Our technical sales team will respond within 24 hours with availability, lead time, and pricing.
- Upon order confirmation, we issue a proforma invoice and arrange shipment via your preferred carrier (DHL, FedEx, UPS, or sea freight for bulk orders).
- Tracking information is provided upon dispatch, with full after-sales support available throughout the warranty period.
Why Choose Konmask.com?
- Industrial Automation Specialists: We focus exclusively on PLC, DCS, HMI, and industrial drive components — not a generalist distributor.
- Global Sourcing Network: Access to new, surplus, and refurbished stock from verified suppliers worldwide.
- Fast Response: Inquiries answered within 24 hours; urgent requirements handled same-day where possible.
- Technical Support: Our team includes engineers with hands-on ControlLogix experience who can advise on compatibility and integration.
- Flexible MOQ: Single-unit orders accepted — no minimum order quantity for most parts.
- Secure Packaging & Export Compliance: All shipments packed to ISTA standards; export documentation prepared for customs clearance.
Frequently Asked Questions
Q: What is the difference between the 1756-PB50 and 1756-PB72?
A: The 1756-PB50 provides 50W of output power with a 24VDC input, while the 1756-PB72 delivers 72W. The PB72 is recommended for larger chassis configurations (13 or 17 slots) with high-density I/O or multiple communication modules that draw more backplane current.
Q: Can the 1756-PB50 be used with AC power sources?
A: No. The 1756-PB50 is a DC input module requiring 18–32VDC. For AC input applications, Allen-Bradley offers the 1756-PA50 (120/240VAC input, 50W) as the equivalent AC variant.
Q: Is the 1756-PB50 compatible with all ControlLogix chassis?
A: Yes, it is compatible with all standard 1756 ControlLogix chassis (4, 7, 10, 13, and 17 slot). It occupies one slot and can be installed in any slot position.
Q: Do you supply new or used units?
A: We supply new (factory-sealed), surplus new (unused but not factory-sealed), and professionally refurbished units. Condition is clearly stated in all quotations. Refurbished units carry a 12-month warranty.
Q: How long does shipping take?
A: Standard international express (DHL/FedEx) typically delivers within 3–7 business days from China. Lead time depends on stock availability confirmed at time of order.
Q: Can you provide a certificate of conformance or test report?
A: Yes. Documentation including certificate of conformance, inspection reports, and traceability records can be provided upon request for new and refurbished units.
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Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691
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