
Chapter 8 ____________________________________________________________ Technical Data
VAISALA______________________________________________________________________ 213
DSU232
DSU232 is an unisolated RS-232 module that will provide either a
double serial channel without handshaking or a single RS-232 with
handshaking. It can also feed 12 V (45 mA) for a serial sensor, when
used in sensor mode.
0401-253
Figure 153 DSU232 Wiring Diagram
0401-254
Figure 154 Suggested T-connection in Dual Port Mode
DSI485A
The DSI485A 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
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