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Getting Started Teledyne API – Model T400 Photometric Ozone Analyzer
54
Figure 3-14: Jumper and Cables for Multidrop Configuration
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
cables to
interconnect 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: Analyzer Options, “Communication Cables”
06870C DCN6332