| Basic order number | Name | Manufacturer |
|---|---|---|
| 6GK1503-3CA00 | PROFIBUS OLM P12 V4.0, 1 RS485, 2 Plastic-FOC-Interfaces (4 BFOC-sockets) | Siemens |
| 6GK1502-3CA10 | OLM/P12 Optical Link Module with 1 x RS-485 and 2 x plastic FO interfaces | Siemens |
| 6GK1502-3CB10 | PROFIBUS OLM/G12 Optical Link Module with 1 x RS-485 and 2 x glass FO interface, for standard distan | Siemens |
| 6GK1503-2CA00 | PROFIBUS OLM/P11 Optical Link Module with 1 x RS-485 and 1 x plastic FO interface | Siemens |
| 6GK1503-2CC00 | PROFIBUS OLM/G11-1300 Optical Link Module with 1 x RS-485 and 1 x glass FO interface, for long dista | Siemens |