Fom (Fibre Optic Modem); Connection To The Powerlink Plc System - Siemens SWT-3000 Equipment Manual

Functional Description

FOM (Fibre Optic Modem)

With the integrated fibre optic modems (FOM) it is possible to connect a SWT 3000 to the PLC
system PowerLink or to a multiplexer via fibre optic cables. The communication of two SWT 3000
units via fibre optic cables is also possible. A distance from 80 km can be covered.
Two FOM modules for the main and alternate path can be integrated into the SWT 3000. In this
case an other (broadened) backplane has to be used. In this case only one SWT 3000 can be in-
stalled in a module frame.
At slot FOM-1 alternatively the CLE module for the wired analog transmission can be inserted. For
applications without FOM modules the primary backplane is used. With it two SWT 3000 units can
be operated in one module frame.
With the FOM modules the following cases of operation can be carried out:

Connection to the PowerLink PLC System:

SWT 3000
Slot PU3f
PU3f
Figure 2:
The SWT 3000 is connected via fibre optic cables (for each transmission direction one fibre) to
the PowerLink. The functional performance of the SWT 3000 is like an integrated SWT i.e. all pos-
sible variants with iSWT can be carried out with the stand alone SWT 3000 via fibre optic cables.
The programming of the SWT 3000 in this case is only possible via PowerLink and the ser-
vice program PowerSys. In the PowerLink system two SWT 3000 can be connected via fibre op-
tic cables (iSWT (A) and iSWT (B)). The FOM modules are installed in the slots of the PU3f.
A digital alternate path can be electrical direct connected to the SWT 3000 or optical via a second
FOM.
The S6 control wire for the switch over in the alternate multi purpose operation is transmitted from
the FOM module to the PowerLink.
Fibre optic module:
Fibre type:
Wave length:
Opt. connector:
Range:
LED
2 x LED
Page - 8
Slot FOx
FOM
E
O
Connection of the SWT 3000 via fibre optic cable to the PowerLink
SFP-Module
multi mode with modules using 850nm wave length, single mode with
modules using 1300nm wave length
850 nm or 1300 nm
LC-connector
approx. 3 km at 1300nm, 550m at 850nm (depending on module type).
receiver alarm
TX- and RX-Alarm (RX + F6UE-Alarm)
Edition p3_3_2x 08/09
SWT 3000 Equipment Manual
PowerLink
Slot PU3f
FOM
<3km
CSP
© SIEMENS AG 2008