What is Power Supply in PLC?

What is Power Supply in PLC?

A power supply is essential for providing power to all hardware components, including the CPU, input/output modules, and any other hardware such as communication modules, mounted on the chassis or base rack. The selection of a power supply depends on the available supply voltage (AC/DC) in your panel. It is further categorized based on the total current requirements, considering all the modules mounted on the base rack or chassis.

Rockwell ControlLogix Power Supply: The Rockwell ControlLogix PLC requires a separate power supply since it is a rack-mounted PLC.

          Module       Description     Voltage Category Operating Voltage Range
  1756-PA50       Slim AC Power Supply120 Volt/240 Volt AC        85-265 V AC
   1756-PA72       Standard AC Power Supply       120 Volt/240 Volt AC        85-265 V AC
0
   1756-PB50       Slim DC Power Supply       24 V DC         18-32V DC
   1756-PB72        Standard DC Power Supply          24 V DC          18-32 V DC
  1756-PB75
  1756-PC75      48 V DC       30-60 V DC
   1756-PH75    125 V DC      90-143 V DC

If you plan to use an AC power supply for the PLC, you can choose the 1756-PA72 model, which operates within a voltage range of 85-265 VAC.

If you plan to use a DC power supply for the PLC, you can select the 1756-PB72 model, which operates within a voltage range of 18-32 VDC.

Extreme Temperature Power Supply:

Power supplies are also further categorized based on extreme temperature requirements. “In certain applications where temperatures are exceptionally high, a power supply capable of enduring such elevated temperatures becomes necessary.” Example: Chemical Factories, Rubber Industry.

Redundant Power Supply:

For a redundant system, a separate redundant power supply is required.

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