CPU 412-1 for S7-400 Racks
The Siemens 6ES7412-1XF04-0AB0 is a CPU 412-1 for the S7-400 platform, a mid-range processor handling up to 244 bytes each of inputs and outputs — enough process image for a substantial machine or process cell without needing an external IM 153 interface module. It communicates natively over RS-485 / PROFIBUS DP, and can act as a DP client (slave) on the network, which matters if you're pulling this CPU into a multi-master line where it needs to respond to a higher-level controller.
Programming and Engineering
Supports LAD, FBD, STL, SCL, GRAPH, and CFC programming languages. Works with STEP 7 engineering software; the onboard MPI interface lets you connect a PG/PC without an additional CP card for commissioning and diagnostics.
Mechanical Fit and Mounting
At 25 mm wide and 290 mm tall, this CPU occupies one slot on the S7-400 rack — the height is the key dimension to check: it's significantly taller than S7-300 modules, so verify your enclosure depth is at least 219 mm plus cabling bend radius.