Hi All,

I'm beginner in this field so propably this is silly question but... I have S7-1200 and HMI panel Proface pfxgm4301tad. This two devices are connecting by ethernet cable. Now i want connect PG to this two devices. PLC dont have any communication module, so i have only one ethernet port in S7-1200. How do I connect to two devices at once? Do I have to buy switch ethernet like this CSM 1277 or different kind of switch?

Thanks.