BOSCH PRS-FINS Fiber interface, single mode

Most of the Praesideo system units have come along with plastic fiber optic interfaces. Plastic fiber is used for interconnecting the nodes which are less than 50 meters apart. For distances of more than 50 meters, glass fiber optic cable is used. A fiber interface is converting from plastic to glass fiber and vice versa. The fiber interfaces have a power supply input for providing the power to remote network sections and two control inputs. The control inputs are capable of passinig on supervision information about the power supply connected to the fiber interface.

Functions
These units interface glass fiber optical cable that comes along with plastic fiber optical cable and supporting redundant wiring topology. In many applications this is necessary, because glass fiber are capable to bridge much longer distances than plastic fiber. Any conversion to glass fiber must be converted back to plastic fiber before other Praesideo units are possible to be attached, since they all have plastic fiber interfaces. This means that these units are always used in pairs.

Each interface are capable to use an external 48 VDC power supply for providing power for itself, as well as for remote parts of the network. If there is no external power source, the interface comes using the power from the network controller. The PRS-FIN and PRS-FINS have two control inputs. These are possible to be used for accepting e.g. the fault output of the external power supply (UPS), allowing the units to monitor the power supply and report faults to the network controller. The fiber interfaces have two LEDs for diagnostic purposes.

The PRS-FINS is the same as the PRS-FIN, except that it accepts single-mode glass optical fiber instead of multi-mode glass optical fiber. However, this does not increase the maximum permitted cable length of a Praesideo network.

Controls and indicators

Power status LED
• Network status LED

Interconnections
• Network connection for plastic optical fiber
• Network connection for glass optical fiber
• External power supply input
• Two control inputs

Features