Siemens SIMATIC NET PROFIBUS - Manual (Page 226)

Passive Components for Electrical Networks
7-30
PROFIBUS Networks SIMATIC NET
6GK1970-5CA20-0AA1 Release 2 05/2000
7.4.3 BFOC Connectors for OLMs
The BFOC connectors allow precision fiber-optic cable connections. The
construction of the BFOC connector allows the strain relief of cables to be used.
This is necessary for installing longer fiber-optic cable connections, for example
between OLM/P modules. BFOC connectors must be ordered separately.
Ordering information and instructions on fitting the connectors can be found in
Appendix D.
Figure 7-10 BFOC Connectors with Accessories (Crimping Sleeve and Anti-Kink Sleeve),
for Plastic FO Cables
7.4.4 Connectors for Glass Fiber Cables
BFOC Connectors for Glass Fiber-Optic Cables
In PROFIBUS, only BFOC connectors are used for glass fiber-optic cables.
Figure 7-11 BFOC Connectors with Dust Caps