Siemens 6GK1502-3CB10 Programmable Logic Controller Module

Siemens 6GK1502-3CB10 is a SIMATIC NET PROFIBUS OLM/G12 V3.1 Optical Link Module that adds fiber-optic connectivity to a PROFIBUS network. It provides 1 RS485 interface and 2 glass-fiber interfaces (4 BFOC sockets) for standard distances up to 2850 m, enabling robust double-ring PROFIBUS topologies. Designed for Doppelring configurations, it supports a signaling contact and a measuring output, and it operates from a DC 24 V supply. This module is part of the PROFIBUS OLM/G12 V3.1 family and is used to extend and protect PROFIBUS communications within SIMATIC NET networks, particularly where fiber links are required to bridge remote devices or sub-networks. In practical terms, it lets engineers connect remote PROFIBUS devices over long fiber runs while maintaining RS485-based DP compatibility.