What is the output voltage of Siemens plcs7-200? Input is AC220v

Output is usually -24V, if you use the model with relay output, the relay dry contact can be connected to -24V, ~110V, ~220V, etc., depending on what voltage you use in the circuit. Depending on what voltage circuit you use, you can look at the wiring diagram of the PLC you choose, and there are many different models of S7-200.