​1.Product Overview​

The ​Allen-Bradley 1756-PB75/B ControlLogix® Power Supply​ is a high-capacity, redundant power module engineered for mission-critical automation systems. Designed for Rockwell’s 1756 chassis, it delivers ​75W (6A @ 5.1V DC)​​ with ​N+1 hot-swap redundancy, ensuring zero downtime during failures. Its rugged die-cast aluminum housing features ​IP54 protection​ (–40°C to +70°C) and withstands severe shock/vibration (15g IEC 60068-2-27). Integrated ​dual-input auto-ranging​ (100–240V AC ±10%, 47–63Hz or 125–250V DC) enables global deployment. Key innovations include ​active harmonic filtering​ (<8% THDi), ​predictive failure alerts, and Studio 5000® integration for real-time health monitoring.

2.​Critical Technical Specifications​

​Engineering excellence parameters:

• ​Input Voltage: 100–240V AC (50/60Hz) | 125–250V DC (auto-sensing)
• ​Output Regulation: 5.1V DC ±0.5% (6A continuous, 9A peak/1s)
• ​Efficiency: 92% (EN 50564 compliant)
• ​Redundancy Tolerance: ≤0.1% current imbalance during parallel operation
• ​Hold-Up Time: 20ms @ full load during power loss
• ​Inrush Current: <35A (NTC-limited)
• ​Isolation: 2500V AC input-output (EN 50178 OVC III)
• ​MTBF: >560,000 hours @ 40°C (Telcordia SR-332)
• ​Certifications: UL 61010-1, ATEX II 3G Ex ec IIC T80°C Gc, SIL 2 (IEC 61508)

​3.Targeted Applications​

​Zero-downtime power infrastructure:

• ​Oil & Gas Platforms: SIL 2 safety shutdown systems (API 14F Zone 1)
• ​Pharmaceutical: FDA 21 CFR Part 11-compliant cleanroom control cabinets
• ​Energy Grids: Substation RTUs with generator/UPS backup
• ​Automotive Robotics: 24/7 paint shop robots (–40°C cold-start)
• ​Water SCADA: Flood-resistant pump stations (IP66/NEMA 4X)
• ​Semiconductor: Vibration-sensitive wafer handling tools (Class 10 cleanroom)
• ​Mining: Conveyor control in MSHA-compliant hazardous areas

4.​Competitive Advantages​

​Operational superiorities:

• ​True Hot-Swap: Masterless parallel operation eliminates single-point failures
• ​Energy Optimization: 92% efficiency reduces cooling costs by 40% vs. competitors
• ​Cyber Resilience: TPM 2.0 hardware-backed firmware signing (IEC 62443-4-2)
• ​Lifecycle Economy: 15-year service life with ​zero capacitor replacements​
• ​Phase Loss Immunity: Operates at 50% load during single-phase grid faults
• ​Space Efficiency: 30% smaller footprint than legacy 1756-PA72 modules
• ​Diagnostic Depth: Real-time load/voltage tags via Studio 5000® GSV instructions
• ​Global Compliance: Single SKU covers UL/CE/ATEX/KC/RCM standards

5.​Functional Capabilities​

​Advanced power management:

• ​Intelligent Load Balancing: Auto-distributes current (±0.2A tolerance) across parallel units
• ​Brownout Ride-Through: Maintains regulation down to 85V AC for 50ms
• ​Dynamic Prioritization: Stages power to processors before I/O during recovery
• ​Fault Logging: Stores 256 events (overload/thermal/phase-loss) with μs timestamps
• ​Redundancy Coordination: Syncs with 1756-PSCA2 adapters for ≤3ms failover
• ​Thermal Throttling: Reduces output at >85°C ambient
• ​Generator Mode: Handles 0V input dips for 15ms
• ​Secure Updates: Encrypted firmware via ControlFLASH®

​

Packaging & Shipping

Company Information
Xiamen ZhiCheng Automation Technology Co., Ltdit is a leading global supplier of control system components. We specialize in control systems and drives.
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