CPU 1212C with failsafe and extended temperature
The Siemens 6ES7212-1AF40-0XB0 is a CPU 1212C from the S7-1200 family, with 2 Mbyte of integrated program and data memory — enough for mid-size applications that mix standard and safety logic. It supports LAD and FBD programming with failsafe capability, and includes PROFIsafe for safety-related I/O over PROFINET. That means one CPU handles both standard and safety control without a separate safety relay or F-CPU.
OPC UA and connection budget for vertical integration
An integrated OPC UA server allows direct data exchange with SCADA, MES, or cloud platforms without a separate gateway — useful for brownfield sites that need to pull production data from the controller without adding hardware. The connection resource budget supports up to 64 total connections, including 14 S7, 18 HMI, and 10 OPC UA connections. For a line with multiple HMIs and a SCADA link, that leaves headroom for peer-to-peer S7 communication. PROFIBUS connectivity is available via a CM 1243-5 master or CM 1242-5 slave module — the CPU itself does not have a built-in PROFIBUS port, so plan the expansion slot accordingly.
Regulatory approvals and compliance documentation
The CPU carries both cULus and CE mark approvals, covering North American and European installations. No separate UL listing is needed for panels shipping to either region. Siemens provides RoHS and REACH declarations as part of the standard documentation package — these are available on request and are typically included with the shipment for MRO or tender compliance audits.