Allen-Bradley 1756-PB50 Power Supply | ControlLogix 60W DC Module

Compact DC Power for Demanding ControlLogix Applications

The 1756-PB50 delivers efficient 24VDC power conversion for Allen-Bradley ControlLogix systems. This space-saving power supply maintains reliable operation across varying temperature conditions. It provides essential backplane power for your entire automation rack with consistent performance.

Electrical Specifications & Performance Data

• Input Voltage Range: 18-32 V DC with 24 V DC nominal operation
• Maximum Input Power: 85W at 50°C, derating to 70W at 60°C
• Output Power Rating: 60W at 0-50°C, 50W at 0-60°C ambient temperature
• Current Capacity at 5.1V DC: 8A at 50°C, 6A at 60°C for core logic
• Current Capacity at 24V DC: 2.5A at 50°C, 2.0A at 60°C for interface
• Current at 3.3V DC: 2A continuous for low-voltage circuits
• Current at 1.2V DC: 1.5A continuous for specialized applications
• Inrush Current: 30A maximum during initial power application

Environmental Specifications & Durability

• Operating Temperature: 0°C to +60°C (32°F to 140°F) full range
• Storage Temperature: -40°C to +85°C for transport and storage
• Relative Humidity: 5% to 95% non-condensing during operation
• Operational Shock: 30G impact resistance for rugged environments
• Vibration Resistance: 2.0G from 10-500 Hz frequency range
• Isolation Rating: 250V continuous reinforced insulation system
• Altitude Rating: 2000 meters maximum operating elevation

Physical Dimensions & Installation Requirements

• Dimensions: 14.0 × 7.8 × 14.5 cm (5.51 × 3.07 × 5.71 inches)
• Weight: 0.77 kg (1.7 pounds) compact and lightweight design
• Mounting Position: Left-side chassis slot, dedicated location
• Chassis Compatibility: Series A, B, and C models A4 through A17
• Wiring Specification: 2.5 mm² (14 AWG) 90°C rated copper wire
• Enclosure Type: Open-style requires protective industrial cabinet
• Slot Usage: Does not consume any module slots in the chassis

Performance & Protection Features

• Hold-up Time: 30ms at 60W load, 40ms at 50W load capability
• Efficiency Rating: 85% typical efficiency at full load operation
• Overcurrent Protection: Built-in electronic current limiting
• Thermal Protection: Automatic shutdown on overtemperature condition
• Voltage Regulation: ±2% typical line and load regulation
• Ripple and Noise: 50mV maximum peak-to-peak at 5.1V output

Packaging & Shipping Information

• Package Contents: One 1756-PB50 DC power supply module
• Shipping Methods: Global express delivery via FedEx, UPS, DHL
• Quality Assurance: Comprehensive 12-month warranty coverage

Expert Technical Questions Answered

• How does temperature affect the power output capacity?
• The output derates from 60W at 50°C to 50W at 60°C to ensure reliable operation.
• What is the purpose of the extended hold-up time feature?
• It maintains system operation during brief power interruptions for graceful shutdown.
• Can I use this power supply with all ControlLogix chassis sizes?
• Yes, it supports 4-slot through 17-slot chassis across Series A, B, and C.
• What wire size provides optimal performance and safety?
• Use 2.5 mm² (14 AWG) copper wire with 90°C insulation rating for best results.
• How does the current capacity change with temperature?
• The 5.1V output decreases from 8A at 50°C to 6A at 60°C for thermal protection.