USER'S GUIDE_______________________________________________________________________
38 ___________________________________________________________________ M210194EN-A
120
65
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
5
67
8
9
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:
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