Teledyne 9110TH - Nitrogen Oxides Analyzer - Manual (Page 43)

Getting Started Model 9110TH NOx Analyzer
Teledyne Analytical Instruments 23
3.4.8.3. Connecting to a Multidrop Network
The multidrop option is used with RS-232 and utilizes both com port DB-9 connectors
(RS-232 and COM2) on the rear panel to enable communications of up to eight
analyzers with the host computer over a chain of RS-232 cables. It is subject to the
distance limitations of the RS 232 standard.
The option consists of a small printed circuit assembly, which is seated on the analyzer’s
CPU card (see Figure 3-12). One Option 62 is required for each analyzer along with one
6’ straight-through, DB9 male  DB9 Female cable (P/N WR0000101).
If your unit has a TAI RS-232 multidrop card (Option 62), see Section 4.11.9 for
instructions on setting it up.
Figure 3-12: 9110TH/M Multidrop Card