What Voltage Is Used In Plc?

PLCs can operate with different voltage requirements depending on the specific model and application. Generally, PLCs require an external power supply voltage that falls into three main categories:

  1. PLC Operating Voltage: This is the voltage at which the PLC operates internally. The most common options are 24V DC and 100-220V AC.
  2. PLC Input Voltage: PLC inputs typically operate at 24V DC, which is the most common configuration. However, there are special cases where PLC inputs can accept AC voltage as well.
  3. PLC Output Voltage: PLC outputs can be categorized into three types: relay outputs, transistor outputs, and thyristor (SCR) outputs. Relay outputs can handle both AC and DC voltages, while transistor outputs commonly have 5V DC or 24V DC options. Thyristor outputs are less common and only available in specific models with internal voltage options like 5V, 15V, or 24V. External relay outputs can typically handle voltages up to 220V.

It’s important to refer to the specific PLC model’s documentation or consult the manufacturer’s specifications to determine the exact voltage requirements for a particular PLC.

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