CPU classification and environmental rating
The Siemens 6AG1211-1BD30-2XB0 is a SIPLUS S7-1200 CPU with extended temperature range from -40 °C to 70 °C, rated for 24 V DC supply (20.4 V to 28.8 V). It integrates 1 MB load memory (expandable via SIMATIC Memory Card) and supports FBD and LAD programming languages. A maintenance-free EEPROM holds the entire project, with a typical backup time of 240 hours.
Hardware profile and connectivity
Network connectivity is limited to TCP/IP as a server; there is no onboard PROFIBUS, MODBUS, or AS-Interface. The CPU does support forced values and PID control. For analog inputs, the module accepts 0 to +10 V signals and supports 2-wire sensors. The signal thresholds are 5 V DC at 1 mA for logic 0 and 15 V DC at 2.5 mA for logic 1.
Compliance and documentation
This SIPLUS CPU carries cULus, CE, and UL approvals, satisfying safety certification for North American and European panel builds. It is rated for ambient temperatures from -40 °C to 70 °C, making it suitable for outdoor cabinets, cold storage, or high-heat process areas.