The Siemens 6ES7288-1CR60-0AA0 is a S7-200 SMART CPU with 12 kbyte program memory and a balanced 32-byte digital input / 32-byte digital output map. The 24 V DC rated supply is transformer isolated at 1500 V AC, which means the logic side is galvanically separated from the field wiring — a necessary condition when the CPU shares a panel with drives or contactors that inject common-mode noise. The PID closed-loop control function supports up to 8 loops with continuous or binary controller outputs, automatic/manual mode, so it can handle a multi-zone temperature or pressure scheme without an external loop controller.
Programming and communications
Programmable in LAD, FBD, and STL — the full IEC 61131-3 set for this platform. The RS 485 interface runs up to 187.5 kbps, and the RJ-45 Ethernet port supports TCP/IP with autonegotiation and autocrossing, so it connects directly to a standard switch without a crossover cable. The hardware clock holds time for 7 days without battery backup, which is enough to survive a weekend power-down but not an extended outage.