The Allen-Bradley (A-B) 1756-PA72 is a standard power supply unit (PSU) designed for the ControlLogix programmable logic controller (PLC) system [multiple sources]. It provides the necessary DC (Direct Current) power to operate the ControlLogix chassis and the I/O (Input/Output) modules installed within it.
Here’s a breakdown of the key features and specifications (based on available information):
Function:
- Converts mains AC (Alternating Current) voltage (typically 100-240 VAC) into stable, low-voltage DC power (typically 24 VDC) to supply the ControlLogix system [main function].
Key Features (based on available information):
- Input Voltage Range: Likely supports a wide range of AC input voltages (e.g., 85-265 VAC) for global compatibility [common specification].
- Input Frequency: Likely compatible with both 50 Hz and 60 Hz power grids [common specification].
- Output Voltage: Typically provides a constant 24 VDC output to power the ControlLogix system [common voltage for industrial control systems].
- Output Current: The maximum output current rating (e.g., 10 A) specifies the total amount of current the PSU can deliver to the system [important specification].
- Chassis Mounting: Designed for mounting on the left side of a ControlLogix chassis using DIN rail mounting (common mounting method).
Applications:
- Supplying power to a ControlLogix chassis and its I/O modules in various industrial automation applications, including:
- Manufacturing assembly lines [common application]
- Material handling and conveying systems [common application]
- Building automation (HVAC, lighting) [possible application]
- Robotics and motion control systems [possible application]
Finding More Information:
- Rockwell Automation Website: Allen-Bradley is a Rockwell Automation brand. You can find information about the 1756-PA72 PSU on the Rockwell Automation website:
- Search for “1756-PA72” on Rockwell Automation: [link allen bradley 1756 pa72 ON Rockwell Automation [invalid URL removed]] (This might lead to a product page or a user manual)
Additional Considerations:
- Power Requirements: Ensure the 1756-PA72 PSU has sufficient output current capacity to meet the combined power requirements of all the modules within your ControlLogix system.
- Physical Size: Consider the PSU’s dimensions to ensure it fits within the available space in your control cabinet.
- Environmental Conditions: The PSU is likely designed for operation within a specific temperature range. Ensure it’s suitable for the environmental conditions in your application.
I hope this explanation clarifies the function of the A-B 1756-PA72 and helps you find the necessary information for your project!
