Teledyne 9110TH - Nitrogen Oxides Analyzer - Manual (Page 113)

Operating Instructions Model 9110TH NOx Analyzer
Teledyne Analytical Instruments 93
Figure 4-6: CPU COM1 & COM2 Connector Pin-Outs for RS-232 Mode
TAI offers two mating cables, one of which should be applicable for your use.
 Part number WR000077, a DB-9 female to DB-9 female cable, 6 feet long.
Allows connection of COM1 with the serial port of most personal
computers. Also available as Option 60 (see Section 5.9.1).
 Part number WR000024, a DB-9 female to DB-25 male cable. Allows
connection to the most common styles of modems (e.g. Hayes-compatible)
and code activated switches.
Both cables are configured with straight-through wiring and should require no additional
adapters.
Note Cables that appear to be compatible because of matching connectors may
incorporate internal wiring that make the link inoperable. Check cables
acquired from sources other than TAI for pin assignments before using.
To assist in properly connecting the serial ports to either a computer or a modem, there
are activity indicators LEDs labeled RX and TX) just above the rear panel RS-232 port.
Once a cable is connected between the analyzer and a computer or modem, both the red
and green LEDs should be on. If the RX TX LEDs for RS232 are not lit, change
position of rear panel DCE DTE mode switch (see 4.11.1). If both LEDs are still not
illuminated, check the cable for proper wiring.