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- Allen Bradley
- 1769-PB2
- CompactLogix I/O Module
- USA
- 118 mm × 35 mm × 87 mm
- 0.52kg
- Xiamen, China
- New & In Stock
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Technical Report: Compact I/O Power Supply Module 1769-PB2
1. Product Overview
The 1769-PB2 is a compact industrial DC input power supply module used in Compact I/O PLC systems. It is designed to provide stable backplane power for modular PLC architectures where AC power is not available or DC supply systems are preferred.
This module converts 24V DC input power into regulated backplane outputs of 5V DC and 24V DC, supplying energy to controller and I/O modules within a Compact I/O system.
It is widely used in mobile equipment, battery-powered systems, and industrial control panels operating on DC distribution networks.
2. Brand Information
- Brand: Industrial Automation Control Brand
- Product Category: PLC Power Supply Module
- Technology Field: Industrial Automation / DC Power Systems
- Manufacturing Origin: United States (varies by production batch)
3. Product Series
- Series Name: Compact I/O Series
- System Architecture: Modular PLC expansion platform
- Compatibility: Compact PLC controllers and 1769 I/O modules
- Installation Type: DIN rail backplane mounted module
This series supports flexible system expansion where DC power distribution is required instead of AC input.
4. Product Introduction
The 1769-PB2 accepts 19.2–31.2V DC input voltage and converts it into regulated internal system power.
It supplies:
- 5V DC logic power for CPU and communication modules
- 24V DC field power for I/O modules and field devices
The module is typically mounted on the left side of a Compact I/O rack and acts as the main DC power backbone of the system.
5. Technical Parameters
5.1 Electrical Performance
| Parameter | Value |
|---|---|
| Input Voltage Range | 19.2–31.2V DC |
| Input Current (typical) | depends on system load |
| Output Voltage | 5V DC / 24V DC |
| Output Current @ 5V DC | 2.0 A |
| Output Current @ 24V DC | 0.8 A |
| Power Consumption | ~24–30 W typical system load dependent |
| Inrush Current | moderate DC inrush behavior |
| Power Efficiency | high-efficiency DC conversion design |
| Load Capacity | up to 8 I/O modules per side |
5.2 Electrical Isolation & Protection
| Parameter | Value |
|---|---|
| Isolation Voltage | 30V DC working / reinforced insulation design |
| Dielectric Test Voltage | up to 710V DC (1 min test) |
| Protection Type | Industrial reinforced insulation |
| Grounding Requirement | Protective grounding required |
| Overload Protection | Internal current limiting |
5.3 System Power Distribution
| Parameter | Value |
|---|---|
| Backplane Distribution | 5V and 24V DC dual rail |
| Module Distance Rating | up to 8 modules per side |
| Maximum System Load | limited by total I/O configuration |
| Power Segmentation | left/right distribution architecture |
5.4 Physical Dimensions & Weight
| Parameter | Value |
|---|---|
| Height | 118 mm |
| Width | 70 mm |
| Depth | 87 mm |
| Mounting Type | DIN rail / panel mount |
| Weight | 0.45 kg – 0.52 kg (typical range) |
| Form Factor | Single-slot power module |
5.5 Wiring & Installation
| Parameter | Value |
|---|---|
| Wire Type | Copper conductor |
| Solid Wire Size | 14–22 AWG |
| Stranded Wire Size | 16–22 AWG |
| Input Wiring | 24V DC supply input |
| Output Connection | Backplane integrated power bus |
| Installation Position | Left-side of I/O rack |
6. Product Applications
The 1769-PB2 is widely used in DC-powered industrial automation systems.
Typical application areas:
- Mobile industrial machinery
- Battery-powered control systems
- Offshore and marine automation
- Solar-powered industrial systems
- DC control cabinets
- Manufacturing automation lines
- Transportation systems
- Remote industrial installations
Functional role:
- Supplies backplane power in DC-only environments
- Supports modular PLC expansion systems
- Enables operation in AC-free industrial setups
- Provides stable dual-voltage distribution (5V + 24V)
7. Product Advantages
7.1 DC Power Compatibility
Designed specifically for systems where only DC power is available.
7.2 Stable Dual Output
Provides both 5V logic and 24V field power in one module.
7.3 Compact Modular Design
Fits directly into Compact I/O racks without external converters.
7.4 High System Integration
Supports multiple I/O modules with stable backplane distribution.
7.5 Industrial Reliability
Operates reliably under voltage fluctuation and industrial DC environments.
7.6 Flexible Deployment
Ideal for mobile, remote, or battery-supported automation systems.
8. Recommended Models (Same Series / Related Modules)
8.1 Same Series / Closely Related Modules
| Model | Description | Key Parameters |
|---|---|---|
| 1769-PA2 | AC input power supply module | 120/240V AC input, 2A output |
| 1769-PA4 | Higher capacity AC power supply | 4A/2A output capability |
| 1769-IF4 | Analog input module | 4-channel signal acquisition |
| 1769-OF4CI | Analog current output module | 4–20 mA precision output |
| 1769-OW16 | Relay output module | 16-channel AC/DC switching |
9. Recommended Models (Same Brand – Popular Modules)
| Model | Type | Key Parameters |
|---|---|---|
| 1769-L24ER | PLC Controller | Integrated CPU, Ethernet communication |
| 1769-L33ER | PLC Controller | High-performance processor, motion control |
| 1769-IQ16 | Digital Input Module | 16-channel discrete input |
| 1769-OB32 | Digital Output Module | 32-channel transistor output |
| 1769-IF8 | Analog Input Module | 8-channel process signal acquisition |
10. Summary
The 1769-PB2 is a dedicated DC power supply module for Compact I/O systems, designed for environments where AC power is unavailable or impractical.
Its stable dual-output design, wide DC input range, and modular integration capability make it a reliable choice for mobile, remote, and industrial DC-powered automation systems.