Siemens 6AG1541-1AD00-7AB0 SIPLUS S7-1500 CM PTP RS232 HF -40 ... +70 DEGREES C WITH CONFORMAL COATING BASED ON 6ES7541-1AD00-0AB0 . COMMUNICATION MODUL FOR SERIAL CONNECTION RS232, FREEPORT, 3964(R), USS, MODBUS RTU MASTER, SLAVE, 115200 KBIT/S, 9-PIN SU