Vaisala PTB220 Series Guida Utente Scaricare il pdf (Pagina 44)

USER'S GUIDE_______________________________________________________________________

38 ___________________________________________________________________ M210194EN-A

120

133

145

104

120

ø6.5

FIGURE 5-1 Dimensions and mounting positions of PTB220

barometers

Electrical connections

In barometers with RS232C/TTL level serial/pulse interface the pin

assignment is as follows:

1234

FIGURE 5-2 9-pin female subD-connector

TABLE 5-1 Pin assignment for RS 232C/TTL serial/pulse output

PIN SIGNAL

1 TX with diode

2 TX/TXD/TXD inverted

3 RX/RXD/RXD inverted

4 external power on/off control

5 ground for the RS 232C

6 pulse output (TTL level)

7 ground for supply voltage and TTL level serial

interface and pulse output

8 pulse trigger

9 supply voltage (10...30 VDC)

In barometers with RS 232C/485/422 serial interface the pin

assignment is as follows:

1 2 ... 39 40 41 42 43 44 45 46 47 48 49 ... 112 113

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Vaisala PTB220 Series Guida Utente Pagina 44