Siemens AG 6ES7151-3AA23-0AB0 Interface Module

Siemens 6ES7151-3AA23-0AB0 Interface Module (IM151-3 PN ST) is a PROFINET IO gateway designed for the ET 200S distributed I/O system. This single‑interface module provides one PROFINET IO port and can accommodate up to 63 terminal modules across the ET 200S network, delivering a transfer rate of up to 100 Mbit/s. It operates from a 24 V DC supply, aligning with typical industrial power rails used in ET 200S installations. The module exposes 256 input bytes and 256 output bytes of user data, enabling substantial local I/O addressing without requiring a separate CPU module. For network connectivity, the IM151-3 PN ST includes two RJ45 bus connections and ships with a termination module to simplify bus termination and improve reliability in fieldbus layouts. Widely referenced as a spare-part solution, this variant serves as the interface between ET 200S I/O blocks and a PROFINET controller, acting as the gateway that enables robust 100 Mbps PROFINET communication in industrial Ethernet environments. The product is cataloged under Siemens part 6ES7151-3AA23-0AB0 and is commonly described as the IM 151-3 PN ST interface module for ET 200S, offering compact addressing and straightforward wiring for scalable automation configurations.