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36
Teledyne API – Model T400 O
3
Analyzer
083730400A DCN8130
Analyzer
Analyzer
Analyzer
Last Analyzer
Female DB9
Male DB9
RS-232
COM2
RS-232
COM2
RS-232
COM2
RS-232
COM2
Host
RS-232 port
Ensure jumper is
installed between
JP2 pins 21
↔
22 in
last instrument of
multidrop chain.
Figure 2-12. RS-232-Multidrop PCA Host
/
Analyzer Interconnect Diagram
7. BEFORE communicating from the host, power on the instruments and check that
the Machine ID code is unique for each. In the Setup>Vars menu, check Instrument
ID in the list of variables. To change, select the variable and press the Edit button;
once changed, press the Enter button.
8. Next, in the Setup>Comm>COM1 menu (do not use the COM2 menu for multidrop),
use the Edit button to set COM1 Quiet Mode and COM1 Multidrop to ENABLED;
then press the Accept button.
9. Also check the COM1 Baud Rate to ensure it reads the same for all instruments
(edit if needed and press the Accept button).