S7-1214 DC/DC/DC power supply

best regards

 Hello.

khaoula

Hello everyone

I have a project where I use an S7-1214 PLC communicating with an industrial actuator using the Modbus rtu protocol. Is it possible to use the integrated power supply of the PLC or do I need a power supply module??

best regards

Decoding the PLC type you have:
+ DC as supply power into the PLC
+ DC for inputs
+ DC for outputs

How do you plan giving the PLC supply power? It requires an external 24VDC power supply unit. It does not have to be a Siemens branded type, but it does need to be a power supply unit. This unit can supply 24VDC to all components in your control system when sized correctly.

In the case of S7-1214 AC/DC/RLY, the question becomes relevant. Still I would suggest using an external power supply unit.

Does this touch base with your question or was your question about something else?

BR

khaoula

Hello everyone

I have a project where I use an S7-1214 PLC communicating with an industrial actuator using the Modbus rtu protocol. Is it possible to use the integrated power supply of the PLC or do I need a power supply module??

best regards

 Hello,

it depends on total current consumption, if your installation need more current than what the cpu provide so you need external power supply.

you can calculate current needs using this link, please refer to chapter B "Calculating a power budget"

I hope this help you.

BR

thanks,

it was helpful.