Teledyne Carbon Monoxide Analyzer 300 User Manual download pdf (Page 117)

APPENDIX B: TIPS ON CONNECTING THE

TELEDYNE API ANALYZER RS-232 INTERFACE

Teledyne API analyzers use the RS-232 communications protocol to allow the instrument

to be connected to a variety of computer based equipment. RS-232 has been used for

many years and as equipment has become more advanced, connections between various

types of hardware have become increasingly difficult. Generally, every manufacturer

observes the signal and timing requirements of the protocol very carefully. Problems

arise when trying to specify connectors, and wiring diagrams that attach the analyzer to

various devices.

The problem centers around two areas. First is the physical incompatibility of

connectors. Second is the wiring of the connectors. This Note will attempt to provide

some guidelines for connecting the Teledyne API analyzers to a variety of other

equipment

Connectors:

There is a wide variety of connectors

and cables that are specified to

operate with the RS-232 protocol.

This is because electronics have

decreased in size over the years and

connectors have been downsized to

match the electronics.

Pin Signal

1 Not Used

2 Transmit Data

3 Receive Data

4 Not Used

5 Signal Ground

6 Not Used

7 Data Set Ready (DSR)

8 Request to Send (RTS)

9 Not Used

RS-232 PIN ASSIGNMENTS

FIGURE B.1

Cables & Adapters come

in 4 general types

1. Cables - cables are provided in

various lengths from 6 to 50 feet. In

most cases they have a male

connector at one end and a female at

the other. Variations on this are

ones that provide both a cable and

adapter. For example the cable

provided with our analyzer adapts a

female DB-9 to a male DB-25

connector. Most cables do not

contain a Null modem.

2. Gender changers - convert a male connector to a female connector or vice versa. They

do so WITHOUT changing the pin-to-pin wiring.

3. Adapters - these change from one type plug (DB-9) to another type plug (DB-25).

They do so WITHOUT changing the wiring.

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Teledyne Carbon Monoxide Analyzer 300 User Manual Page 117

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