RS232
(RS485)
(RS422)
0(4) 20mA
0(4) 20mA
,12x
RS232 RS485 RS422
TXD TXA
RXD RXA
- TXB
- RXB
RTS +5V +5V
GND GND GND
RS232C/I+
4 232C /I-
I
-<p I0UT1 +
4 I0UT1-
I
-<|> I0UT2+
- I0UT2-
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