Vaisala PTU300 - Manual (Page 84)

User's Guide _______________________________________________________________________
82 ___________________________________________________________________ M210796EN-G
0506-033
Figure 50 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.
User Port Operating Modes
When the transmitter is powered up, it will behave according to its
configured operating mode:
- In STOP mode, the transmitter outputs the software version and the
command prompt (if echo is on).
- In RUN mode a measurement output starts immediately.
- In SEND mode one measurement message is printed and command
prompt is displayed (if echo is on).
- In POLL or MODBUS mode, the transmitter does not output anything
after power-up.
For a description of the modes, see section SMODE on page 121.
NOTE RS-232 User Port cannot be used when a communication module
(LAN, WLAN, or RS-422/485 interface) has been installed.
Service Port Connection
Connection Cables
To connect to the service port, you need a suitable cable with an RJ45
connector. Depending on the connections of your PC, you can either use
the Serial Connection Cable (optional accessory 19446ZZ) or the
USB-RJ45 Serial Connection Cable (optional accessory 219685). The
USB cable enables you to connect the transmitter to a PC via a standard
type A USB port. Note that the USB cable does not enable high speed
1 2 3 4 5
6 7 8 9
+
–
RxD
GND
TxD
Ch1+
Ch1–
Ch2+
Ch2–
ANAL
OG
O
UT
PUT
S
US
ER P
ORT
POWE
R
RS
-232
10…
36 V
=
24 V
~
IOIOI