TS5, BCT-1510, BCT-1520,BCT-153018ABCD1 2 3 41 2 3 43.6 MAIN ASSY (5/7)5/7AA 5/7 MAIN ASSY (5/7)IO BLOCK(TS5 : BWE1103)(BCT-1520 : BWE1115)(BCT-1530 : BWE1110)(BCT-1510 : BWE1115)A 2/7A 2/7A 7/7A 7/7RS-232C DriverSerial I/FParallel I/FTermination Network IC