CPU 315-2 DP with FM 8 and full IEC programming
The 6ES7315-2AH14-0AB0 is an S7-300 CPU with FM rating of 8. It supports CFC, FBD, LAD, SCL, STL, HiGraph, and GRAPH. The backplane I²t is rated at 1 A²·s. Input and output addressing each reach 244 bytes, with a maximum of 16 modules overall. The CPU communicates via PROFIBUS DP over an isolated RS-485 interface. Physical dimensions are 40 mm wide, 125 mm high, 130 mm deep. It requires STEP 7 V5.2 SP1 or higher with a hardware update. The unit supports forcing, retentive data (must be restarted at each restart), and routing only with an active interface. Up to 4 CPs, 10 CP LAN connections, and 8 PtP CPs can be configured.
How it compares to the 6ES7315-2EH13-0AB0
The closest sibling in the same S7-300 footprint is the 6ES7315-2EH13-0AB0, which adds a PROFINET interface and enables MPI. This CPU (2AH14) lacks MPI and uses only PROFIBUS DP.