Product Overview

The Siemens 6GK1503-2CB00 is a high-performance PROFIBUS OLM/G11 (Version 4.0) optical link module engineered to facilitate seamless conversion between electrical RS485 interfaces and glass fiber optic media. This industrial-grade converter is designed to extend PROFIBUS network segments over vast distances while providing total galvanic isolation. By utilizing optical transmission, the 6GK1503-2CB00 effectively eliminates the risks associated with ground loops and electromagnetic interference (EMI), ensuring high-speed data integrity in complex automation environments. The module serves as a critical bridge for expanding SIMATIC S7 and other PROFIBUS-compliant systems beyond the limitations of copper cabling.

Hardware Parameters and Metrological Data

• Optical Interface: 1x Glass Fiber Optic port with 2 BFOC sockets

• Electrical Interface: 1x RS485 Sub-D connector (9-pin)

• Supported Baud Rates: Automatic detection from 9.6 kbit/s up to 12 Mbit/s (includes 45.45 kbit/s for PA)

• Fiber Type Compatibility: Multimode glass fiber (62.5/125 µm or 50/125 µm)

• Supply Voltage: 24V DC (Functional range 18.8V to 28.8V DC)

• Monitoring Features: Integrated signaling contact and dedicated analog test port for optical level measurement

• Protection Mechanism: Built-in power supply fuse for circuit safety

• Housing Weight: 0.95 kg (Net module weight approximately 0.34 kg)

• Unit Dimensions: 2.5 cm x 5.1 cm x 83.8 cm

• Manufacturing Origin: Germany

• HS Export Code: 8537101190

The module’s robust construction is optimized for DIN rail mounting within control cabinets, providing a reliable communication link in environments with high potential differences.

Industrial Networking Utility and Deployment

The 6GK1503-2CB00 OLM/G11 is primarily deployed in large-scale infrastructure and heavy industrial plants where long-distance communication is mandatory. In water and wastewater treatment facilities, it is utilized to link remote pumping stations to a central PLC, bypassing the electrical noise generated by high-power pumps and variable frequency drives. It is equally essential in the mining and metallurgy sectors, where optical fibers provide lightning protection and interference-free data transmission between disparate buildings. Because the module supports the PROFIBUS PA rate of 45.45 kbit/s, it is a staple in the oil and gas industry for connecting hazardous area segments to safe-zone controllers. Furthermore, the integrated test port allows maintenance technicians to perform proactive signal strength analysis without interrupting the network, making it an ideal choice for high-availability systems where downtime is not an option.