Vaisala HydroMet User's Guide download pdf (Page 142)

User's Guide ______________________________________________________________________

140 __________________________________________________________________M210784EN-E

RS-232 Module DSU232

The unisolated RS-232 module provides either a double serial channel

without handshaking or a single RS-232 with handshaking. In addition,

an optional SDI-12 interface is available.

1007-019

Figure 61 RS-232 Wiring Diagram

1006-123

Figure 62 Suggested T-Connection in Dual Port Mode

For the SDI-12 wiring with the later version, see Figure 68 on page 145.

The SDI-12 data pin is the same as in the dual RS-485 module, and the

same wiring method can be used as in Figure 68 on page 145.

See Figure 68 on page 145 and Table 32 on page 141 for the SDI-12

jumper of DSU232-C.

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Vaisala HydroMet User's Guide Page 142