The Allen Bradley 1769-PB2 is a Compact I/O power supply module designed to provide regulated DC backplane power for CompactLogix and 1769 I/O expansion banks. It is typically used in systems where additional I/O modules extend beyond the controller’s built-in power capacity.
The module supports stable distributed architecture in industrial control panels, ensuring consistent power delivery for mixed digital and analog I/O configurations.
Technical Specifications (Electrical & Mechanical)
| Parameter | Specification |
|---|---|
| Manufacturer | Allen Bradley (Rockwell Automation) |
| Catalog Number | 1769-PB2 |
| Module Type | Compact I/O Power Supply |
| Input Voltage | 19.2–31.2 V DC (nominal 24 V DC) |
| Output Capacity | 2.0 A @ 5 V DC / 0.8 A @ 24 V DC |
| Power Consumption | Approx. 50 VA @ 24 V DC |
| Inrush Current | Max 30 A @ 31.2 V DC |
| Power Dissipation | 7.5 W @ 60°C |
| I/O Bank Support | Up to 16 Compact I/O modules (8 per side) |
| Mounting Type | DIN rail or panel mount |
| Wiring Category | Category 2 |
| Protection | Internal fuse protection |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Dimensions | 118 × 70 × 87 mm |
| Weight | Approx. 0.34–0.53 kg |
System Integration Notes
The 1769-PB2 is installed between CompactLogix controllers and expansion I/O banks to maintain proper backplane power distribution. Each power supply supports both left and right module groups, allowing flexible system layout.
It is commonly used when:
- Expanding I/O beyond controller power limits
- Designing multi-bank Compact I/O systems
- Supporting mixed analog and digital configurations
- Building modular machine control panels
Recommended Related Modules
| Model | Function |
|---|---|
| 1769-L33ER | CompactLogix Controller |
| 1769-ECR | End Cap Module |
| 1769-PA2 | AC Input Power Supply Variant |
| 1769-IF8 | Analog Input Module |
| 1769-OB16 | Digital Output Module |
| 1769-OW8 | Relay Output Module |
Common Allen Bradley CompactLogix Modules
| Model | Purpose |
|---|---|
| 1756-EN2T | EtherNet/IP Communication Module |
| 1756-L81E | ControlLogix Controller |
| 1734-AENTR | POINT I/O Adapter |
| 5069-IB16 | Compact 5000 Input Module |
| 2711P-T10C4D8 | PanelView HMI Terminal |
| 2080-LC50-48QWB | Micro850 Controller |
