The Allen-Bradley 1756-PB75 is a high-performance, standard DC power supply module designed specifically for the ControlLogix platform. This module is engineered to provide reliable power to the chassis backplane, converting an 18-32V DC input into the necessary logic voltages (1.2V, 3.3V, 5.1V, and 24V DC) required by ControlLogix I/O and processor modules. With a maximum output power rating of 75W, it is capable of supporting fully populated chassis configurations in demanding industrial environments.
Features
75W maximum output power at 60 degC.
Designed for dedicated mounting on the far-left slot of a 1756 chassis.
Wide input voltage range: 18-32V DC (24V DC nominal).
Integrated overcurrent and overvoltage protection for backplane safety.
250V continuous galvanic isolation between the power source and backplane logic.
Compatible with standard 1756 Series B and C chassis (1756-A4, A7, A10, A13, A17).
Technical Specifications
Product Model
1756-PB75
Module Type
Standard DC Power Supply
Input Voltage
24V DC (Nominal)
Input Range
18-32V DC
Output Power
75W at 60 degC
Input Power
95W
Mounting
ControlLogix Chassis (Leftmost Slot)
Weight
0.98 kg
Applications
Water and Wastewater Treatment: Powering controllers for dosing pumps and flow valves.
Food and Beverage Production: Supporting automation for pasteurization and bottling lines.
Chemical and Petrochemical: Providing stable power for high-precision PID control loops.
HVAC and Climate Control: Managing industrial cooling towers and damper systems.
Metals and Mining: Supporting hydraulic press control and position monitoring.
Installation Guidelines
Ensure the power supply is installed in the dedicated leftmost slot of the 1756 chassis.
Always disconnect the main power source before inserting or removing the module from the chassis.
Ensure proper grounding of the chassis to minimize EMI and protect against electrical surges.
Maintain adequate clearance around the chassis to allow for proper airflow and cooling, as the unit is rated for operation up to 60 degC.
Use appropriately sized wiring for the 24V DC input to prevent voltage drop.
FAQ
What is the difference between the 1756-PA75 and 1756-PB75?
The 1756-PA75 is designed for AC power input (85-264V AC), whereas the 1756-PB75 is designed for DC power input (18-32V DC).
Which chassis are compatible with this power supply?
The 1756-PB75 is compatible with standard 1756 Series B and C chassis, including models 1756-A4, A7, A10, A13, and A17.
