Allen-Bradley 1769-PB2 CompactLogix 24V DC Expansion Power Supply

Product Description

The 1769-PB2 (1769-PB2) is a high-reliability DC expansion power supply module designed for the Allen-Bradley CompactLogix and MicroLogix 1500 controller families. This module is essential for systems where the primary controller's power capacity is exceeded or when creating additional distributed I/O banks via expansion cables. It converts a 24V DC field input into regulated backplane power, ensuring stable operation for logic circuits and communication bus signals.

Engineered with reinforced insulation, the 1769-PB2 (1769-PB2) provides superior electrical separation between the DC input source and the sensitive internal backplane. This isolation prevents external noise, grounding disturbances, and surge transients from affecting CPU performance or I/O data integrity. With a distance rating of 8 modules per side, it offers the flexibility needed for high-density industrial control cabinets and multi-rack architectures.

Detailed Technical Specifications

The following specifications define the electrical and environmental parameters for the 1769-PB2:

• Manufacturer: Allen-Bradley / Rockwell Automation

• Model Number: 1769-PB2

• Product Type: DC Expansion Power Supply

• Input Voltage Range: 19.2 to 31.2 V DC

• Nominal Input Voltage: 24 V DC

• Power Consumption: 50 VA @ 24 V DC

• Backplane Output (5.1V DC): 2.0 Amps

• Backplane Output (24V DC): 0.8 Amps

• Maximum Power Dissipation: 7.5 Watts @ 60 °C

• Maximum Inrush Current: 30 Amps @ 31.2 V DC

• Power Supply Distance Rating: 8 modules (Left or Right side)

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

• Internal Protection: Non-replaceable fuse (Wickmann 19193-6.3A / Littelfuse 021706.3MXP)

• Terminal Wiring: 14 AWG (2.5 mm²) solid copper rated for 90 °C

• Operating Temperature: 0 to 60 °C (32 to 140 °F)

• Mounting Options: DIN Rail or Panel Mount