The OLMs have a compact metal housing. It is suitable for mounting on a standard rail or for wall mounting with a mounting plate.

The 24 V power supply is fed in through a terminal block and can be redundantly connected.

The signaling contact allows a digital signal to be transferred to PLCs or HMI systems for evaluation.

OLMs can be combined with each other and individual stations or complete electrical segments can be integrated into the optical PROFIBUS network through an electrical interface. With the PROFIBUS OLM P22 and OLM G22, two electric PROFIBUS segments can be connected separated from each other.

OLMs are available with one or two fiber optic interfaces with BFOC connectors for different types of fiber optic cables:

• Plastic fiber-optic cables (980/1000 µm) can be used for single lengths of up to 80 m. They can also be assembled with BFOC cable connectors on site.
• PCF fiber-optic cables (200/230 µm) can be used for single lengths of up to 400 m. They are offered preassembled with four BFOC plugs and an insertion tool.
• Glass fiber multimode fiber-optic cables (62.5/125 µm) such as the SIMATIC NET Fiber Optic cables can be used for long distances of up to 3000 m. They must be ordered preassembled with 4 BFOC plugs or as a FastConnect FO system for assembly on site.
• Singlemode fiber-optic cables (10/125 µm or 9/125 µm fibers) can be used for extremely long distances up to 15 km.