Excellent PLC
Product Introduction
The Allen-Bradley 1756-PA72K ControlLogix AC Power Supply is a reliable and widely used power module designed to provide stable backplane power for ControlLogix automation systems. With a standard 72 W output capacity, it ensures consistent and efficient power delivery to controllers, I/O modules, and communication modules installed within the chassis.
This unit accepts a wide AC input voltage range of 85–265 VAC, making it suitable for global industrial applications without requiring additional voltage conversion. It delivers a regulated 5 VDC output at up to 10 A, along with additional current capacity for other backplane voltage rails, ensuring proper operation of all installed modules.
The 1756-PA72K is chassis-mounted on the left side and connects directly to the backplane, simplifying installation and improving system integration. Its open-style design enhances heat dissipation, while built-in status LEDs provide clear diagnostics for power conditions. The conformal coating further protects the module in harsh industrial environments.
Product Specifications
| Parameter | Description |
| Model | 1756-PA72K |
| Brand | Allen-Bradley |
| Product Type | ControlLogix AC Power Supply |
| Input Voltage Range | 85–265 VAC |
| Nominal Input Voltage | 120 / 220 VAC |
| Input Frequency | 47–63 Hz |
| Input Power (Max) | 100 VA / 100 W |
| Output Power (Max) | 75 W @ 0–60°C |
| Output Voltage | 5 VDC |
| Output Current (5V) | 10 A |
| Current Capacity (1.2/3.3/5.1/24V) | 1.5 / 4 / 10 / 2.8 A |
| Power Dissipation | 25 W @ 0–60°C |
| Inrush Current (Max) | 20 A |
| Isolation Voltage | 250 V continuous |
| Mounting Type | Chassis mount (left side) |
| Design | Open-style |
| Status Indicators | LED indicators |
| Operating Temperature | 0 to 60°C |
| Dimensions | 140 × 112 × 145 mm |
| Weight | 0.95 kg |
| Coating | Conformally coated |
Applications
● ControlLogix automation systems
Provides stable backplane power for controllers and I/O modules.
● Manufacturing and production lines
Ensures reliable power delivery in continuous operation environments.
● Process industries (oil & gas, chemical, power)
Supports critical systems requiring high reliability and uptime.
● Distributed control systems
Used in large-scale automation architectures with multiple modules.
● Global industrial installations
Wide input voltage range allows deployment across different regions.
Advantages
● Wide AC input range (85–265 VAC)
Eliminates the need for external voltage conversion, supporting global applications.
● Stable and high-capacity output
Provides up to 75 W output power with reliable 5 VDC supply at 10 A.
● Direct backplane connection
Simplifies installation and improves electrical efficiency.
● Multiple voltage rails support
Supplies various backplane voltages for different module requirements.
● Robust diagnostic features
LED indicators allow quick identification of power status and faults.
● High durability design
Open-style construction and conformal coating enhance heat dissipation and environmental resistance.
● Flexible chassis compatibility
Compatible with ControlLogix chassis Series A and B.
