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GE Series 90-30 PLC - Logic Diagram

GE Series 90-30 PLC
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B-6 Series 90-30 PLC Installation and Hardware Manual
August 2002 GFK-0356Q
B
Logic Diagram
The following figure shows the logic diagram for the RS-422/RS-485 to RS-232 Converter.
20
7
5
4
3
2
8
a44539




MODEM







DCD
LOGIC
POWER



NC
SHIELD
TERMINATOR
RD ( B' )
RD ( A' )
SD (B )
SD (A )
CTS ( B' )
CTS ( A' )
RTS ( B )
RTS ( A )
DCD ( B )
DCD ( A )
+5
SG
ATCH/
ATTACH
1
9
11
10
13
12
8
15
14
6
3
2
5
7
4
SHIELD
SD
RD
RTS
CTS
DCD
SG
1
RS-232/RS-485
CONVERTER
(IC690ACC900)
RESISTOR
120
RS-485
15-PIN
RS-232
25-PIN
DTR
Figure B-4. RS-422/RS-485 to RS-232 Converter Logic Diagram

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