Vaisala HydroMet Guía de usuario descargar pdf (Pagina 32)

User's Guide ______________________________________________________________________

30 ___________________________________________________________________M210784EN-E

The SDI-12 channel has its own connecting point on the board. It does

not use channel A or B for the communication. SDI-12 is galvanically

connected to the host board's GND potential.

There is a later version of this module, DSI486-B, that widens the

operating range and usable RS-485 line speed. The later version has the

same functionality as the original one and can be used as a drop-in

replacement without changes to the system configuration. Note that its

jumper locations and settings are slightly different.

Fixed Line Modem Module

The fixed line modem module is used for providing a long-distance

fixed line connection between two Vaisala devices with a similar

interface. It is used when the distance is up to 10 km, for example,

between the QML logger and a digital display, or between a ceilometer

and the logger. Through this I/O port, a remote location can send reports

and data or the host can poll them. The fixed line modem module must

be configured before use.

0306-013

Figure 11 Fixed Line Modem Module DMX501

The fixed line modem module supports the following communication

standards:

- V.21, 300 bps FSK

- V.23, 1200 / 75 bps FSK

- V.22, 1200 bps DPSK

1 2 ... 27 28 29 30 31 32 33 34 35 36 37 ... 159 160

Sin comentarios

Vaisala HydroMet Guía de usuario Pagina 32