Vaisala WMS302 Guía de usuario Pagina 216

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User's Guide ______________________________________________________________________
214 __________________________________________________________________M210630EN-B
connection is used to connect several devices to the same
communication line. The 4-wire mode is the default mode.
9812-001
Figure 155 DSI485A Wiring Diagram
DSI486
Channel A is always used in the RS-485 mode. In 2-wire RS-485, both
transmitted and received data is sent via this channel. In 4-wire RS-485
this channel can either transmit or receive depending on the
configuration. Jumper X4 defines the line terminating resistor for the
data channel A. Remove the jumper X4 if you do not need the
terminating resistor of DSI486. Figure 156 on page 214 provides a
schematic wiring diagram for dual RS-485.
0201-048
Figure 156 DSI486 Wiring Diagram for Dual RS-485
NOTE
In 2-wire mode, only T+ and T- pins are used.
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