PCD3 processor unit with Ethernet TCP/IP,
web and FTP server, file system,
CPU with 128 KByte user program,
backup with on-board Flash memory, clock (RTC),
USB port for PG5, up to 64 I/O, 2 interrupt inputs,
RS-485 for Profi-S-Net or S-Bus
Datasheet: 26-447_ENG_DS_PCD3M3120.pdf
PCD3.M3120