Does a PLC need its own power supply?

A PLC without a power supply is much like a car without gas, or a laptop without a battery. It is the fuel for the PLC. How powerful a PLC is will greatly depend on how powerful the power supply is.

How do I choose a power supply for a PLC?

Its output current should be bigger than:

1. 23,5W / 24V = 0.98A.
2. DC Voltage. The voltage at the PSU output is 24VDC, as much as we need.
3. Rated current. Current range. The output current range is within 0-0.63A.
4. Rated power. The power that the power supply produces is 15.2W. Also, this is not enough.

Can you connect two power supplies?

Two or more power supplies can be connected to supply higher voltages or current. The simplest method to create higher current is to connect the power supplies in parallel and leave only one supply in constant voltage mode.

Why SMPS is used in PLC?

While designing your control panel circuit, use a power supply along with the different power specifications for your design to provide a constant DC output at all times. Furthermore, the purpose of SMPS is to gain the most efficient conversion process.

Why only 24V supply used in PLC?

Typically, control devices are large and operate on the same voltage used to power the motors. By using 24V DC as a control voltage, manufacturers can increase reliability. One reason for this is that these power supplies operate with limiting circuits to protect against short circuits.

Why is 24V DC used in PLC?

24VDC is just robust enough to overcome any long distance signal wire v-drop to carry a 4-20ma signal of accurate meaningful value. Likewise it is robust enough to power smart transmitters at a distance such as those that provide modbus communication.

Can power supplies be connected in series?

Power supplies can be connected in series to increase the output voltage as shown in Figure 5. Only power supply from the same product series and with same rated output current should be used. Any number of power supplies can be connected in series.