Siemens 6GK1502-3CB00 Industrial Ethernet Module

Siemens 6GK1502-3CB00 is a SIMATIC NET PROFIBUS Optical Link Module (OLM) designed for G12 fiber-optic PROFIBUS networks. It provides galvanic isolation between the PROFIBUS side and the optical link, and interfaces with PROFIBUS devices via RS-485 while connecting to fiber optics on the other side. This version, denoted by the 3CB00 suffix, belongs to the OLM/G12 family and is intended to integrate seamlessly with Siemens’ industrial networking ecosystem for robust, long-distance communication in electrically noisy environments. Typical applications include extending PROFIBUS segments beyond copper reach and linking remote I/O, drives, or field devices through fiber in automation installations that require reliable isolation and EMI resistance. As part of the Siemens SIMATIC NET lineup, the 6GK1502-3CB00 supports standard PROFIBUS DP equipment and serves as a dedicated optical-fiber bridge within distributed control architectures, enabling engineers to optimize network topology without compromising signal integrity. This module is specified to function within Siemens’ PROFIBUS OLM/G12 configurations, offering a compact, maintainable solution for projects that demand isolated, fiber-enabled PROFIBUS connectivity.