Siemens 6ES7315-2EH14-0AB0 Digital Input Module

Siemens SIMATIC S7-300 CPU 315-2 PN/DP (6ES7315-2EH14-0AB0) is a compact PLC processor module designed for use in SIMATIC S7-300 rack systems. It provides 384 KB of work memory and serves as the central controller with an integrated MPI/DP interface at 12 Mbit/s for fieldbus communications and a second Ethernet PROFINET interface that includes a built‑in 2‑port switch for networked I/O and devices. The module operates from a 24 V DC supply and has a rated current consumption of 750 mA (no-load about 150 mA). For program and configuration storage, a Micro Memory Card is required. It also features mains buffering with a stored-energy time of about 5 ms to help maintain operation through brief power interruptions. Weighing approximately 340 g, this CPU acts as a DP master and coordinator for DP slaves and MPI/DP devices in the rack, delivering real-time control and communication across both PROFINET networks and MPI/DP, enabling seamless integration of I/O modules and devices. Typical applications include process and machine automation where a compact central processor is needed to manage I/O, logic, and communications within an S7-300 installation, such as packaging lines, assembly automation, and small to mid-size manufacturing cells.