CPU for S7-400 rack
The 6AG1417-4XT05-4AB0: Rack-mounted CPU for the SIMATIC S7-400 family. One slot wide (50 mm), 290 mm height, 219 mm depth. Power supplied via the system backplane; no local 24 V DC connection. Rated for -40 to 70 °C ambient, so it handles unheated cabinets or steam-cycle environments. Supports CFC, FBD, LAD, SCL, STL, and GRAPH — covers sequential, function-block, and structured-text IEC languages. PROFIBUS DP V0 via RS485 interface. RDREC, WRREC each limited to 8 simultaneous calls. Process image: 244 bytes input and 244 bytes output. Forcing supported.
System sizing — FM capacity and connections
The number of function modules (FM) is limited by physical slots in the rack and per-module connection count. That means module density depends on the specific FM type and how many connections each consumes. Plan I/O and communications accordingly. Point-to-point CPs: CP 440 limited by slots, CP 441 by connections. PROFIBUS CPs: max 4 in central controller; mixed operation not allowed. DP topology functions and system status reads limited to between 1 and 8 calls, as listed. These counts bound diagnostic and configuration access.
CE marked. No other certification classes (UL, RoHS, REACH) are declared in the available listing. Verify compliance documentation with your local Siemens representative if required for tender.