Bosch Appliances 3.5 manual 26PRS-FIN, PRS-FINNA, PRS-FINSFiber Interface, 26.1Introduction

Praesideo 3.5 Installation and User Instructions 6 Installation Accessories

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26PRS-FIN, PRS-FINNA, PRS-FINS Fiber Interface

26.1Introduction

The PRS-FIN, PRS-FINNA or PRS-FINS Fiber Interfaces are used to convert from plastic optical fiber (POF) cable to glass optical fiber (GOF) cable and vice versa for covering long distances. The following types are available:

Type	Description
PRS-FIN	Fiber Interface with control inputs
	(multi mode)
PRS-FINNA	Fiber Interface without control inputs
	(multi mode)
PRS-FINS	Fiber Interface with control inputs
	(single mode)

POF			GOF
Control Inputs
I	Network
	Processor
	Fault	Power	External
			Power

figure 26.1: Block diagram of the fiber interface

The PRS-FINNA Fiber Interface only converts from POF to GOF. It does not count as a node in the system (see table 31.2) with respect to the maximum number of nodes, 63, that can be in a system. It is intended for systems in which otherwise the maximum number of nodes would be exceeded. However, this unit does influence the maximum cable length of the system as if it was a normal node (see figure 31.5).

In emergency sound systems, do not use this type of fiber interface to power far-end units. Since it does not have any control inputs, it is not possible to supervise its external power supply (if connected). Using the PRS-FINNA Fiber Interface as a near-end fiber interface that is connected to the network controller is possible though.

These units in metal housing are the successors of the LBB4414/00, LBB4414/10 and PRS-FINMO in plastic housing.

26.2Controls, connectors and

indicators

The fiber interface (see figure 26.2) contains the following:

1External power supply - A connection for an

(optional) external power supply. The external power supply feeds the Praesideo network (see section 26.3.3).

2Control inputs - The control inputs can be used to receive signals from third party equipment that must trigger actions in the Praesideo network (see

section 26.3.4).

3POF connector - A POF connector to connect the fiber interface to a POF cable (see section 26.3.2).

4Power LED - A green power LED that provides information about the status of the fiber interface. (see section 26.3.5).

5Fault LED - A yellow fault LED that provides information about the status of the fiber interface (see section 26.3.5).

6GOF connector - A GOF connector to connect the fiber interface a GOF cable (see section 26.3.2).

Bosch Security Systems 2011-02