Product Description

The 1769-PB4 is a high-capacity DC expansion power supply designed for the Allen-Bradley Compact I/O and CompactLogix platform. This module is engineered to provide regulated backplane power for I/O banks that exceed the current capacity of the controller's integrated power source or for remote I/O configurations. It converts a nominal 24V DC input into the specific 5V DC and 24V DC voltages required by internal module circuitry.

With a robust 4.0 A current capacity at 5V DC, the 1769-PB4 is critical for maintaining system stability in high-density I/O racks. It supports up to eight modules within a single bank, providing reinforced isolation and integrated circuit protection to safeguard sensitive processor and communication components from input voltage fluctuations and field-side transients.

Detailed Technical Specifications

The 1769-PB4 offers industry-standard protection features and specific current derating curves to ensure reliable operation in demanding environments.

• Manufacturer: Allen-Bradley / Rockwell Automation

• Model/Part Number: 1769-PB4

• Module Type: DC Power Supply Module

• Input Voltage: 24V DC (Nominal)

• Input Voltage Range: 19.2–31.2V DC

• Power Consumption: 100 VA @ 24V DC

• Output Current Capacity (5V DC): 4.0 A

• Output Current Capacity (24V DC): 2.0 A

• Inrush Current (Max): 30 A @ 31.2V DC

• Power Dissipation: 14.5 W @ 60 °C

• Isolation Voltage: 75V (continuous), tested at 1697V DC for 1 second

• Fuse Types: Wickmann 19193-6.3A or Littelfuse 021706.3MXP

• Power Supply Distance Rating: 8 Modules

• Operating Shock: 20G

• Wire Size: 22–14 AWG (Solid) or 22–16 AWG (Stranded) copper wire rated for 90 °C

• Dimensions: 11.8 x 5.25 x 8.7 cm

• Weight: 0.94 lbs (0.43 kg)