Compact CPU with onboard I/O
The 6ES7314-6CH04-0AB0 is a SIMATIC S7-300 CPU 314C-2 DP, a compact controller with integrated digital and analog I/O. It carries FM 8 onboard function modules, so expansion for specialized tasks (like positioning or counting) sits right on the CPU without an extra rack. Analog inputs accept ±10 V / 100 kΩ and ±20 mA / 100 Ω ranges, plus Pt100 directly — no extra signal conditioners for RTDs. The I²t rating of 0.7 A²·s limits short-circuit energy on the integrated outputs; useful for panel designers sizing external protection.
How it differs from the 6ES7314-1AF10-0AB0
The 6ES7314-1AF10-0AB0 is a standard CPU without onboard I/O. The 6CH04 variant adds analog inputs (0 V to 10 V, ±10 V, 0 to 20 mA, ±20 mA, 4 to 20 mA, Pt100) and FM 8 slots directly.
Physical fit and I/O addressing
Dimensions are 120 mm wide × 125 mm high × 130 mm deep — standard S7-300 footprint for a compact CPU. The 244-byte input and 244-byte output address space means the integrated I/O consumes part of the process image, leaving headroom for expansion modules. STEP 7 is required; the version must be V5.5 + SP1 or higher (or V5.3 + SP2 with HSP 203). GSD file for PROFIBUS DP is available from Siemens directly.
Programming language support
This CPU supports LAD, FBD, STL, SCL, CFC, GRAPH, and HiGraph — covers relay-ladder traditionalists up to state-machine designers. For function-block-oriented projects, CFC and HiGraph are available, though HiGraph is licensed separately.