Vaisala PTB330 - Manual (Page 67)

Chapter 4 ________________________________________________________________ Operation
VAISALA _______________________________________________________________________ 65
User Port Connection
Use a suitable serial cable between the user port’s RxD, GND, and
TxD screw terminals and the PC serial port.
NOTE Do not use the user port when RS-485 module is connected.
Table 10 Default Serial Communication Settings for the User
Port
Parameter Value
Bit rate
4800
Parity Even
Data bits
7
Stop bits 1
Flow control None
1 2 3 4 5
6 7 8 9
+
–
RxD
GND
TxD
POWER
CONTROL
U
SER
P
O
R
T
PO
WER
RS
-2
32
10
…3
6
V=
IOIOI
Figure 37 Connection Example Between PC Serial Port and
User Port
Connections to pins 4, 6, 7, and 8 on PC serial port are required only if
you are using software requiring hardware handshaking.
After power-up, the barometer (in STOP mode) outputs the software
version and the command prompt.
In RUN mode, a measurement output starts immediately after power-
up.