Why 24 Volts DC Power Supply?

  • Why 24 Volts DC Power Supply?


A 24-volt DC power supply is commonly used in instrumentation and control systems for several reasons:

  1. Compatibility: Many sensors, transmitters, and control devices are designed to operate on a 24-volt DC power supply. Standardizing on this voltage makes it easier to integrate various components into a system without the need for additional voltage converters or adapters.
  2. Safety: Low-voltage DC power supplies like 24 volts are generally considered safer than higher voltage systems. They pose less risk of electrical shock to personnel and are less likely to cause damage to equipment in case of a fault.
  3. Cost-Effectiveness: 24-volt power supplies and components are often more affordable than higher voltage alternatives. Additionally, wiring for lower voltages typically requires less insulation and can be less expensive to install.
  4. Efficiency: Lower voltage systems can sometimes be more efficient in terms of power consumption and heat dissipation compared to higher voltage systems, especially for smaller-scale applications.
  5. Standardization: Many industrial standards and protocols, such as 4-20 mA current loops and various fieldbus protocols, are designed around a 24-volt power supply. Using a common voltage simplifies system design and troubleshooting.
  6. Availability: Components such as power supplies, relays, and switches designed for 24-volt systems are widely available from various manufacturers, making it easier to source and replace parts as needed.

Overall, the choice of a 24-volt DC power supply for instrumentation and control applications balances factors such as compatibility, safety, cost, efficiency, and standardization to provide a reliable and effective solution for powering and controlling industrial processes.