Main functions
1）TF-BUS-U1 is a controller with Button-on-demand controller,2 pcs 08interface and 4 pcs 12interface on board.Support maximum pixel is 640*64.
2) It could update the programs by RS232 （expand RS485）or USB,and set the panel
3) It could expand 10 keys,the former10 keys are for former 10programs on demand.
4) The former 10 programs can be on demand, when no on-demand, in turn play the advertisements after the 11th program(include the 11th program).
