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User's Guide ______________________________________________________________________

142 __________________________________________________________________M210784EN-E

Isolated RS-485 Module DSI485

The isolated RS-485 communication module can be configured either

for a 2-wire line or for a 4-wire line when the receive and transmit lines

are separated. If the module is configured for a 2-wire line, the

transmitter is enabled only during the transmission. Normally, the 2-

wire connection is used to connect several devices to the same

communication line. The 4-wire mode is the default mode.

1006-100

Figure 64 Isolated RS-485 Module Wiring Diagram

NOTE

In 2-wire mode, only T+ and T- pins are used.

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Vaisala HydroMet Guide de l'utilisateur Page 144