A-B 1756-PB75/B Backplane Bus Module

Allen‑Bradley 1756‑PB75/B – ControlLogix 75W DC Power Supply Module (Backplane Power)

Specifications

• Input Voltage: 18–32V DC (nominal 24V DC)
• Input Power: 95W max
• Output Power: 75W @ 0–60°C
• Backplane Outputs:
  • 1.2V DC @ 1.5A
  • 3.3V DC @ 4A
  • 5.1V DC @ 13A
  • 24V DC @ 2.8A
• Inrush Current: 30A max
• Hold‑up Time: 35ms @ 18V; 40ms @ 24/32V
• Isolation: 250V continuous (reinforced insulation); 3500V DC for 60s (input‑to‑backplane)
• Mounting: Leftmost slot of 1756 chassis (A4/A7/A10/A13/A17)
• Dimensions (H×W×D): 140 × 112 × 145 mm
• Weight: ~0.95 kg (2.1 lb)
• Operating Temp: 0°C to +60°C
• Lifecycle: Active (Series B, latest revision)Rockwell Automation

Features

• Backplane power source: Supplies all 1756 I/O and controller modules
• High power capacity: 75W supports large chassis configurations
• Wide input range: 18–32V DC accommodates industrial 24V systems
• Reinforced isolation: Protects against electrical noise and faults
• Hot‑swap capable: Replace without shutting down the system
• Status LEDs: Power, fault, and activity indicators