1.Product Overview​

The ​Allen-Bradley 1756-PB72/B ControlLogix® Power Supply​ delivers ​72W (3A @ 24V DC)​​ of high-efficiency power for mission-critical automation systems. Designed for the 1756 chassis platform, this dual-slot module features ​N+1 redundancy support, ​hot-swap capability, and ​active current-sharing technology​ to ensure zero downtime. Its rugged aluminum housing (-40°C to +70°C operating range) withstands 5g vibrations (IEC 60068-2-6), 95% humidity, and corrosive environments. Integrated diagnostic LEDs monitor voltage stability, load distribution, and thermal status, while ​conformal-coated PCBs​ provide exceptional resistance to dust, chemicals, and condensation. Certified for ​ATEX Zone 2​ and ​IEC 61508 SIL 2, it’s ideal for hazardous locations.

2.​Critical Technical Specifications​

​Performance-defining parameters:

• ​Input Voltage: 85–265V AC (50/60Hz) or 120–250V DC (auto-sensing)
• ​Output: 24V DC ±1% regulation (2.5–3A continuous)
• ​Redundancy: ≤5% current imbalance tolerance during parallel operation
• ​Efficiency: 88% typical (EN 61204-3 compliant)
• ​Hold-up Time: 20ms @ full load during power interruption
• ​Protections: Short-circuit (auto-recovery), over-voltage (28V clamp), over-temperature (90°C shutdown)
• ​Isolation: 1500V AC input-to-output (IEC 62103)
• ​MTBF: >500,000 hours @ 40°C (IEC 61709)
• ​Certifications: UL 61010-1, ATEX II 3G Ex ec IIC T80°C Gc, RoHS III

3.​Targeted Applications​

​High-availability power systems:

• ​Oil & Gas: SIL 2 safety shutdown systems (SIS) in API 14F facilities
• ​Power Generation: Gas turbine control cabinets requiring <10ms ride-through
• ​Pharmaceutical: Cleanroom bioreactor controls (FDA 21 CFR Part 11)
• ​Water Treatment: Submersible pump PLCs in flood-prone stations (IP66)
• ​Automotive Robotics: 24/7 welding cells with vibration immunity
• ​Mining: Conveyor control panels in Group I/II hazardous areas
• ​Data Centers: Industrial UPS bridging for critical automation

4.​Competitive Advantages​

​Operational superiorities:

• ​Zero Downtime Architecture: Hot-swappable replacement in <2 minutes
• ​Predictive Diagnostics: Real-time load/voltage monitoring via Controller Tags
• ​Global Compatibility: Single SKU supports worldwide voltages/certifications
• ​Energy Optimization: Fanless design reduces heat dissipation by 40%
• ​Safety Integration: SIL 2 compliance for redundant safety PLCs
• ​Space Efficiency: Dual-slot design saves 30% vs. conventional PSUs
• ​Lifecycle Economy: 50,000+ power cycles (15-year service life)
• ​Cyber Resilience: Signed firmware validation (IEC 62443-4-2)

5.​Functional Capabilities​

​Advanced power management:

• ​Active Current Sharing: Auto-balances loads (±0.5A) across parallel units
• ​Brownout Immunity: Maintains output during 15ms voltage dips
• ​Phase-Loss Tolerance: Stable operation with single-phase grid failures
• ​Fault Logging: Stores last 10 events (overload/thermal) with timestamps
• ​Dynamic Prioritization: Stages power to processors/I/O during startup
• ​Redundancy Coordination: Syncs with 1756-PSCA power control adapters
• ​Studio 5000® Integration: GSV instructions for remote health monitoring
• ​Inrush Control: Limits startup surge current to 20A (NTC-protected)

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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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