660 c numerical control keyboard 

Transmission baud rate: 9600 BPS 

Communication protocol: PELCO_D Sony Visca 

The input voltage: 12 VDC, transformer 10 watts, 230 vac, 50 hz 

Communication RS - 485 communication distance of 24 awg cable, 4000 feet (1000 m) 

Built-in relay rated current 1 amp 

Working temperature 0 ℃ to 49 ℃ 

LCD display the ball machine control state