http://sigma-shop.com/rs485-relays.html
Download ZIP file
http://www.info.kmtronic.com/software/RS485_Relays/RS485_Relays_Command_Prompt.zip
Unzip in any folder
in example "D:\KMtronic"
Quick help
rs485relays.exe COM<COM port> <COMMAND>
COM port: COM port
COMMAND: RS485 Relays commands (http://info.kmtronic.com/kmtronic-rs485-relays-commands.html)
NOTE: Commands must be without space (intervals).
Commands examples
rs485relays.exe COM5 FF0101 (this will turn on channel 1 board connected to COM:5)
rs485relays.exe COM5 FF0100 (this will turn off channel 1 board connected to COM:5)