This Siemens LOGO! 12/24RCO (6ED1052-2MD00-0BA2) is the base-level logic module for small automation tasks. It runs on 12 or 24 V DC, gives you 8 digital inputs — two of which double as 0–10 V analog inputs — and 4 relay outputs rated 10 A resistive, 3 A inductive. The 80-hour real-time clock power reserve keeps time through a weekend shutdown. Mounts on 35 mm DIN rail, 4 TE wide.
No onboard short-circuit protection; external fusing required. UL, CSA, FM, marine approvals, and Class B for residential use.