Vaisala WS425FG - Manual (Page 24)

User's Guide ______________________________________________________________________
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When using the fiber optic connection between the Ultrasonic Wind
sensor and a personal computer, two fiber optic modems are needed.
One is supplied as standard with the Ultrasonic Wind sensor enclosed
in the power supply module housing. The other is available from
Vaisala as an optional accessory. Please note that FOM111 is supplied
without a housing. If needed, the customer must source a proper
housing locally.
The fiber optic cable is connected to the connectors of the fiber optic
modem located in the power supply module assembly and at the other
end to the connectors of the optional FOM111 fiber optic modem. The
FOM111 in turn is connected to the host system personal computer/data
logger via an RS-232 cable. Note that the RS-232 cable between the PC/
data logger and the fiber optic modem is different than the one used
between the PC and the TEST connector in the power supply module
(see
Figure 5 on page 20 ).
A DC power supply for the fiber optic modem is also required. See
Connecting Fiber Optic Cable on page 28 and Connecting Fiber Optic
Modem FOM111 on page 28 for further instructions on how to make the
fiber optic connections.