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1756-PB75/B Allen Bradley Module 24VDC High Capacity Controllogix Io Modules

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1756-PB75/B Allen Bradley Module 24VDC High Capacity Controllogix Io Modules

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Brand Name :Allen Bradley
Model Number :1756-PB75/B
Certification :3C
Place of Origin :America
MOQ :1
Price :Negotiable
Payment Terms :T/T
Supply Ability :1/piece in stock
Delivery Time :3-7
Packaging Details :50*50*50mm
Number Of Conductors :8 conductors (4-pair)
Product Series :Point I/O (Bul. 1734)
Hardware Type :I/O Chassis
Module Type :Processor Module
Type :module
Manufacturer :Allen-Bradley
Compatibility :ControlLogix platform
Operating Temperature :0-60°C
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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®

Key Parameter Specification/Description
Manufacturer Allen-Bradley (Rockwell Automation)
Series/Platform ControlLogix®
Module Type Chassis Power Supply (AC/DC Input)
Part Number 1756-PB75/B (Revision B)
Input Voltage Range 85-132V AC / 170-265V AC (Switch-selectable)
120-250V DC
Input Frequency 47-63 Hz (AC mode)
Output Voltage +5.1V DC (Primary), +24V DC (Auxiliary)
Output Current 14.7A @ +5.1V DC (75W max)
1.5A @ +24V DC (36W max)
Total Power 111W maximum (combined)
Inrush Current 40A peak @ 120V AC
Efficiency ≥88% @ full load
Hold-up Time ≥20ms (AC input dropout)
Overload Protection Auto-resetting current limit (5V & 24V)
Thermal Protection Shutdown at >85°C with auto-recovery
Status Indicators Green (OK)
Red (Fault)
Yellow (Input Voltage Warning)
Backplane Connection Direct chassis backplane interface
Input Terminal 3-pin removable block (0.5-2.5mm² / 20-12 AWG)
Operating Temperature 0°C to 60°C (32°F to 140°F)
Derating Curve Required above 40°C: Linear derating from 100% to 60% @ 60°C
Cooling Method Internal forced-air fan
Audible Noise ≤55 dBA @ 1m
Safety Certifications cULus (UL 508), CE, ATEX/IECEx Zone 2
EMC Compliance EN 61326-1, EN 61000-6-2/4
Compatible Chassis 1756-A4/A7/A10/A13/A17 (Left-end slot only)
Weight 1.8 kg (4.0 lb)
Dimensions (H×W×D) 194 × 60 × 135 mm (7.64 × 2.36 × 5.31 in)
MTBF 650,000 hours @ 40°C (IEC 61709)
Leakage Current <3.5 mA @ 240V AC
Harmonic Distortion <20% @ full load
Voltage Tolerance +5V: ±3%
+24V: ±5%
Ripple & Noise +5V: 100mV p-p max
+24V: 200mV p-p max
Product Status ACTIVE (Legacy) - Newer alternative: 1756-PB75R (Redundant-ready)

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1756-PB75/B Allen Bradley Module 24VDC High Capacity Controllogix Io Modules

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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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1756-PB75/B Allen Bradley Module 24VDC High Capacity Controllogix Io Modules

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1756-PB75/B Allen Bradley Module 24VDC High Capacity Controllogix Io Modules

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