V+15V VCC2C1+3C1-4DRIVER OUT5RX IN6DRIVER OUT7RX IN8RX IN9RX IN10DRIVER OUT11RX IN12ON/OFF#13NC14NC15DRIVER DISABLE16GND17RX OUT18DRIVER IN19RX OUT20RX OUT21RX OUT22DRIVER IN23RX OUT24DRIVER IN25C2+26C2-27V-28