The Siemens 6ES7211-1BD30-0XB0 is a SIMATIC S7-1200 CPU 1211C, a compact PLC controller for machine automation. It operates on a 24 V DC supply, permissible range 20.4 V to 28.8 V, and covers -40 to 70 °C ambient.
Supply and environmental limits
The 24 V DC supply is isolated; the permissible range from 20.4 V to 28.8 V means the rail must stay above 20.4 V for guaranteed operation. The wide -40 to 70 °C temperature range allows mounting in unheated cabinets or near hot machinery.
Memory and backup
Integrated load memory of 1 Mbyte holds the user program and data. Backup time of 240 h typical retains the volatile memory during power loss. The integral EEPROM provides maintenance-free retention of the entire project.
Programming and communication
Supported programming languages include LAD (ladder), FBD (function block diagram), and SCL (structured control language). The CPU supports TCP/IP communication as server; MODBUS, PROFIBUS, and AS-Interface are not onboard.
Approvals and sourcing
Carries CE and cULus marks, covering the primary industrial compliance requirements for European and North American markets.