24 VDC auxiliary circuit – why it is used in control panels

Why we use 24 VDC

Many PLCs, sensors, relays, and solenoid valves operate on 24 VDC because it is suitable for control circuits.

What to check

• Power supply output voltage.
• 24 VDC fuses.
• Polarity.
• Short circuits in branches.

Common problem

If the voltage drops when a load is connected, there may be an overload or a short circuit in a device.