--
ANALYZER OF THE QUALITY OF ELECTRIC POWER SUPPLY
QNA-303 --
Page
30
•
Cable for RS-232 communication (PC -
QNA-303
)
QNA-303 PIN
FEMALE DB9
1 3
2 7
3 2
4 8
5 4
6 5
•
Cable for RS-485 communication (RS 485 converter -
QNA-303
)
The
QNA-303 RS-232
can be communicated to a PC via an external modem.
This system can be applied in these facilities for which a communication via the
conventional phone line is wanted to be set. The communication cable to be used in
these cases is different, and also the modem unit must be set to have no control of
the DTR and to automatically hold the line on when a call is received. (Consult the
user’s guide of the modem to be used for any particular application).
•
Communication cable for an external modem application
QNA-303 PIN
MALE DB25 MALE DB9
1 3 2
2 5 8
3 2 3
4 4 7
5 6
4-6
6 7 5
Converter RS485/RS232
PIN QNA
DB9 Female
RS-485
DB9 Male
RS-232
DB9 Female
PC
7 2
2
3
8 1
3
2
9 5
5
5
7
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8
