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Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer
Teledyne Analytical Instruments 104
Figure 6-8: CPU Connector Pin-Outs for COM1 & COM2 in RS-232 Mode
Teledyne Instruments 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
5.5.1).
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.
To assist in properly connecting the serial ports to either a computer or a modem, there are activity
indicators just above the 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 lights for COM 1 are not lit, use small switch
on the rear panel to switch it between DTE and DCE modes (See
Section 6.11.4). If both LEDs are still not illuminated, check the cable for proper wiring.