CPU built for the pit
The Siemens 6AG1214-1BG31-2XB0 is a SIPLUS variant of the S7-1200 CPU that shrugs off the thermal extremes common in mining and mineral processing — rated for -40 °C to 70 °C ambient, so it keeps running whether the crusher bay is baking in summer or the conveyor tunnel is frozen in winter. The 24 V supply tolerates dips down to 20.4 V and surges up to 28.8 V, matching unregulated field power feeds that would trip a standard CPU. It handles the usual S7-1200 programming languages: LAD, FBD, and SCL are all supported (FBD and LAD confirmed on this order code), so existing TIA Portal projects migrate without language changes.
Interfaces and memory
PROFINET is the primary fieldbus interface, with both client and server capability. MODBUS TCP and UDP are also available, and PROFIBUS and AS-Interface are listed as supported — useful for migrating older field networks. The CPU has 4 MB of integrated load memory for program and data, and the retentive backup holds 480 h typical after power loss, enough to survive a weekend shutdown. Inputs and outputs are 1 024 byte each. Bit memory address area is 8 kbyte.
Physical and mounting
The module measures 110 mm wide, 100 mm high, and 75 mm deep — standard S7-1200 footprint. No forced-air cooling required at full temperature range, but keep clearance around the vents in the panel to avoid heat buildup at the 70 °C end.