
Chapter 4 _________________________________________________________________ Operation
VAISALA________________________________________________________________________ 61
User Port Connection
Use suitable serial cable between the user port RxD, GND and TxD
screw terminals and the PC serial port.
Table 12 Default Serial Communication Settings for User
Port
Parameter Value
Bauds 4800
Parity Even
Data bits 7
Stop bits 1
Flow control None
1 2 3 4 5
6 7 8 9
+
–
RxD
GND
TxD
Ch1+
Ch1–
Ch2+
Ch2–
ANALOG OUTPUTS USER PORT POWER
RS-232 10…36 V=
24 V~
IOIOI
0506-033
Figure 39 Connection Example Between PC Serial Port and
User Port
Connections to pins 4,6,7 and 8 are required only if your software
requires hardware handshaking.
NOTE
User port cannot be used when RS-485 module is connected.
Service Port Connection
1. Connect the serial interface cable (optional accessory, order
code: 19446ZZ) between the serial port of your PC and the
service port connector on the motherboard, see Figure 39 above.
2. Power-up the DMT346.
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