Saia Burgess Controls +++ - Pcd3.M3120
PCD3.M3020 does not exist anymore, replacement would be PCD3.M3120. PCD3 processor unit 128 KBytes user program, backup with internal flash memory, USB port for PG5, up to 64 I / O (not expandable), 2 interrupts, web server, RS 485 for Profi-S-Net or SBC S-Bus, slot # 0 for PCD3.F .., Ethernet TCP / IP