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Figure 3-10.
RS232 to RS485
Conversion for Host
PC.
3-14 | 5830 Moisture Analyzer
3.
Connect the 4 to 20 mA analog output (13) (see Figures 3-10a and
3-10b) and alarm and data valid terminals (14) on the interface board
to the analyzer through the metallic signal conduit (2) (Figure 3-2).
4.
Connect the RS-232 or RS-485 serial communication to the analyzer.
The RS-485 connection, analog output and alarm/data valid contacts
share the same cable.
RS-485 communications
-
Turn on the RS-485 termination switch (11) Figure 3-9 if communi-
cating with one analyzer or the last in a chain of analyzers.
2-wire and 4-wire mode selection is performed using software.
NOTE
SHLD
Converter
TDA(-)
TDB(+)
RDA(-)
RDB(+)
To PC
GND
+12V
ECHO
CONTROL
RTS
OFF
ON
SD
SHLD
Converter
TDA(-)
TDB(+)
RDA(-)
RDB(+)
To PC
GND
+12V
CONTROL
ECHO
OFF
RTS
ON
SD
Converter and Power Supply are not suitable for use in hazardous
locations. Refer to Chapter 7 for replacement part numbers.
NOTE
5. Replace terminal cover.
TB3
12
11
14
13
RS485 IN
Power
Analyzer
Supply
(type DB9M)
TB3
14
13
RS485 IN
Power
Analyzer
Supply
(type DB9M)
4 wire
RD-
RD+
TD-
TD+
2 wire
TD-
TD+
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