Siemens 6GK1502-3AB10 Programmable Logic Controller Module

6GK1502-3AB10 is an Optical Link Module (OLM/S3) from Siemens in the SIMATIC NET family, designed to connect PROFIBUS networks over glass-fiber optic cable. This 3-channel variant (3AB10) includes a signaling contact and is intended for use in single-ring PROFIBUS configurations. The unit is listed with Siemens order number 6GK1502-3AB10 and operates from a 24 V DC supply. As an Optical Link Module, it provides a fiber-optic interface for PROFIBUS segments, enabling connections via fiber links and supporting multi-channel configurations within a single device. Typical deployments place this module at network junctions where copper runs are impractical or where long-distance fiber links are required to reach remote PROFIBUS nodes. The OLM/S3 designation identifies it as the S3 variant of the optical-link family used for single-ring topologies and specific channel arrangements.