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Model 9110T NOx Analyzer Getting Started
Teledyne Analytical Instruments 54
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 3-16: 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 (Section 5.7.1).
3. a. In the SETUP Mode menu go to SETUP>MORE>COMM>ID. The
default ID is typically the model number or “0”.
4. b. to change the identification number, press the button below the digit to
be changed.
5. c. Press/select ENTER to accept the new ID for that instrument.
8. Next, in the SETUP>MORE>COMM>COM1 menu (do not use the COM2 menu for
multidrop), edit the COM1 MODE parameter as follows: press/select EDIT and set
only QUIET MODE, COMPUTER MODE, and MULTIDROP MODE to ON. Do not
change any other settings.
9. Press/select ENTER to accept the changed settings, and ensure that COM1 MODE
now shows 35.
10. Press/select SET> to go to the COM1 BAUD RATE menu and ensure it reads the
same for all instruments (edit as needed so that all instruments are set at the same
baud rate).
Note
The (communication) Host instrument can address only one instrument at a
time, each by its unique ID (see step 7 above).