Relay Timer R4X is programmable timer software to control relay manually and automatically.
It works with 4-channel relay controller boards of National Control Devices.
In order to control your device (relay board) with Relay Timer R4X, be sure to install the application on your PC and then connect the relay board with your PC. There are two ways for connection, Com Port and Network.
Click 
button to show the Configuration dialog.
You need select the type of your relay board and the connection way, and select the connection method that the relay board is connected to. Click OK to finish setting.
If the connection is available, there will be a arrow show on the status bar to show the data transmission. Now, you can control your relay manually or automatically with schedule setting.
Otherwise, “Connection Error!” will be shown on the status bar.