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- 1769-PA4
- CompactLogix I/O Module
- USA
- 118 mm × 35 mm × 87 mm
- 0.63kg
- Xiamen, China
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Technical Report: Compact I/O Power Supply Module 1769-PA4
1. Product Overview
The 1769-PA4 is an industrial-grade AC input power supply module used in Compact I/O systems for PLC-based automation architectures.
It converts wide-range AC input power into regulated 5V DC and 24V DC backplane power, supplying energy to controllers and multiple expansion I/O modules in a compact rack system.
This module is typically installed on the left side of a Compact I/O assembly and acts as the main power distribution unit for the entire system.
2. Brand Information
- Brand: Industrial Automation Control Brand
- Product Category: PLC Power Supply Module
- Technology Field: Industrial Automation / Control 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 mounting system
This series is designed for scalable PLC systems where power and I/O modules share a unified modular structure.
4. Product Introduction
The 1769-PA4 is designed to supply stable system power by converting 85–265V AC input into DC voltages required by PLC backplanes.
It delivers both 5V DC logic power and 24V DC field power, supporting multiple connected I/O modules on both sides of the rack.
It is widely used in medium-to-large industrial control systems where higher power capacity is required compared to smaller power modules.
5. Technical Parameters
5.1 Electrical Performance
| Parameter | Value |
|---|---|
| Input Voltage Range | 85–265V AC (selectable range) |
| Input Frequency | 47–63 Hz |
| Output Voltage | 5V DC / 24V DC |
| Output Current @ 5V DC | 4.0 A |
| Output Current @ 24V DC | 2.0 A |
| Power Consumption | 200 VA @ 120V AC / 240 VA @ 240V AC |
| Inrush Current | up to 25 A @ 132V AC |
| Power Dissipation | ~8 W @ 60°C |
| Load Capacity | up to 16 I/O modules total (8 per side) |
5.2 Electrical Isolation & Protection
| Parameter | Value |
|---|---|
| Isolation Voltage | 265V continuous reinforced insulation |
| Test Voltage | 2596V DC (1 second test) |
| Protection Type | Industrial reinforced insulation |
| Grounding Requirement | Protective earth required |
| Safety Class | IEC Class 1 |
5.3 Physical Dimensions & Weight
| Parameter | Value |
|---|---|
| Height | 118 mm |
| Width | 70 mm |
| Depth | 87 mm |
| Mounting Type | DIN rail / panel mount |
| Weight | 0.63 kg (approx. 0.525–0.63 kg depending on revision) |
| Form Factor | Power supply module |
5.4 Wiring & Installation
| Parameter | Value |
|---|---|
| Wire Type | Copper conductor |
| Solid Wire Size | 14–22 AWG |
| Stranded Wire Size | 16–22 AWG |
| Input Wiring | AC line / neutral or dual phase |
| Output Connection | Backplane integrated distribution |
| Installation Position | Left-side of I/O rack |
6. Product Applications
The 1769-PA4 is used in industrial systems requiring stable and higher-capacity power distribution for modular PLC architectures.
Typical application fields:
- Industrial automation production lines
- Machine control systems
- Packaging machinery
- Conveyor and logistics systems
- Water treatment plants
- HVAC control panels
- OEM equipment systems
- Process control systems
Functional role:
- Provides system-wide backplane power
- Supports both controller and I/O modules
- Enables expansion of larger I/O configurations
- Stabilizes distributed PLC power architecture
7. Product Advantages
7.1 Higher Power Capacity
Compared with smaller power modules, it provides stronger 5V and 24V output capability for larger I/O systems.
7.2 Wide Input Compatibility
Supports 85–265V AC input, reducing the need for region-specific variants.
7.3 Stable Dual Output Design
Simultaneous supply of logic and field power improves system integration efficiency.
7.4 Strong Electrical Isolation
Reinforced insulation ensures safe separation between AC input and PLC backplane circuits.
7.5 Scalable System Support
Capable of supporting up to 16 modules, making it suitable for medium-to-large control systems.
7.6 Industrial Reliability
Designed for continuous operation under electrical noise, voltage fluctuation, and thermal stress conditions.
8. Recommended Models (Same Series / Related Modules)
8.1 Same Series / Closely Related Modules
| Model | Description | Key Parameters |
|---|---|---|
| 1769-PA2 | Lower capacity AC power supply module | 2A/0.8A output version |
| 1769-PB2 | DC input power supply module | 24V DC powered system |
| 1769-IF8 | 8-channel analog input module | High-density signal acquisition |
| 1769-OF8C | 8-channel analog output module | 4–20 mA current outputs |
| 1769-OW16 | 16-channel relay output module | AC/DC switching outputs |
9. Recommended Models (Same Brand – Popular Modules)
| Model | Type | Key Parameters |
|---|---|---|
| 1769-L24ER | PLC Controller | Integrated CPU, Ethernet communication, modular expansion |
| 1769-L33ER | PLC Controller | High-performance processor, motion control support |
| 1769-IQ16 | Digital Input Module | 16-channel discrete input, fast switching |
| 1769-OB32 | Digital Output Module | 32-channel transistor output, high-density control |
| 1769-IF4 | Analog Input Module | 4-channel process signal acquisition |
10. Summary
The 1769-PA4 is a high-capacity AC power supply module designed for Compact I/O systems requiring stable and scalable backplane power distribution.
Its wide input range, strong output capacity, and robust industrial protection make it suitable for medium to large automation systems where reliability and expansion capability are essential.