Features:
- One RS485 segment exchanges PROFIBUS frames with one glass-fiber interface.
- Separate BFOC transmit and receive sockets form the bidirectional optical path.
- Optical-level measurement, signal contact, redundant power, and ring settings support diagnosis.
Electrical frames are regenerated as light before crossing the isolated fiber section.
The remote optical signal is converted back to RS485 for connected copper stations.
Fiber choice, loss budget, polarity, rate, and ring mode determine successful operation.
The Siemens 6GK1503-2CB00 PROFIBUS OLM/G11 Optical Link Module may remain available for quotation and support beyond End-Of-Life (EOL) by the manufacturer (OEM).
Siemens 6GK1503-2CB00 PROFIBUS OLM/G11 Optical Link Module Manuals,Datasheets,Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Moving PROFIBUS frames between copper and light
- RS485 input: The nine-pin electrical interface receives the PROFIBUS frame.
- Optical transmit: The module regenerates the frame as an 860 nm signal.
- Optical receive: The return BFOC path brings remote light into the receiver.
- RS485 output: Recovered data is regenerated for the connected electrical segment.
Calculating whether the fiber path has enough margin
- Fiber core: 50/125 µm and 62.5/125 µm fibers use different documented budgets.
- Launch power: Transmitter output starts the loss calculation.
- Path losses: Fiber attenuation, splices, and BFOC connections consume available margin.
- Receiver threshold: The arriving signal remains above sensitivity through the intended 3 km maximum.
Coordinating redundant optical paths across modules
- Topology: Participating OLMs form the documented optical ring arrangement.
- Operating mode: Every module uses the required ring or line configuration.
- Fault response: A path interruption changes the active communication route.
- Recovery check: LEDs, signal contact, optical level, and network status confirm restored communication.
Supplying the module and verifying the physical path
- Main supply: A 24 V DC source powers the conversion electronics.
- Redundant supply: A second feed maintains power if the first path fails.
- Signal contact: The relay transfers the configured module status to external monitoring.
- Measuring terminal: The test connection supports optical-level checks without replacing protocol diagnostics.