Siemens 6AG1540-1AD00-7AA0 SIPLUS S7-1500 CM PTP RS232 BA -40 ... +70 DEGREES C WITH CONFORMAL COATING BASED ON 6ES7540-1AD00-0AA0 . COMMUNICATION MODUL FOR SERIAL CONNECTION RS232, FREEPORT, 3964(R), USS, 19200 KBIT/S, 9-PIN SUB-D CONNECTOR