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Getting Started Teledyne API T801 NDIR CO2 Analyzer Operation Manual
44
Figure 3-14: Jumper and Cables for Multidrop Mode
(Note: If you are adding an instrument to the end of a previously configured chain,
remove the shunt between Pins 21 22 of JP2 on the Multidrop/LVDS PCA in
the instrument that was previously the last instrument in the chain.)
4. Close the instrument.
5. Referring to Figure 3-15 use straight-through DB9 male DB9 female
cabl
es to inte
rconnect the host RS232 port to the first analyzer’s RS232 port;
then from the first analyzer’s COM2 port to the second analyzer’s RS232
port; from the second analyzer’s COM2 port to the third analyzer’s RS232
port, etc., connecting in this fashion up to eight analyzers, subject to the
distance limitations of the RS-232 standard.
6. On the rear panel of each analyzer, adjust the DCE DTE switch so that the
green and the red LEDs (RX and TX) of the COM1 connector (labeled
RS232) are both lit. (Ensure you are using the correct RS-232 cables
internally wired specifically for RS-232 communication; see Table 1-1,
“Co
mmuni
cation Cables” and the preceding subsection, “RS-232
Connection”).
07274B DCN6418