I am a researcher in one of the industrial researcher Institue in malaysia.
Right now i am using a C200HG plc to control the machine.The mechine is connected to the pc for data logging and status monitering with RS232 comunication.This pc programmed for sending the data to the controller(C200HG)for machine operation.This machine have one device actually the high voltage transformer with rated 240/12000v/3A + ignition circuit to creat a spark for machine used.
My problem is when i am switching this device, the RS232 comunication card was burn.The card cannot used back anymore.What i am doing now just bypass the comunication a while this device were switching.This will effect the functioning of the machine to opererated in fully automated.
Something that i had consedired now is.
1. Put surge supparesor.
2. Insulated incomeing supply for the device and the Controller.
Plz share me any mathod to solve this problem.