Teledyne 300M Connectors, Cables & Adapters come in 4 general types, Signal, 12-4

Teledyne API Model 300M CO Analyzer Instruction Manual, 04033, Rev. A

APPENDIX A 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

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 A.1

modem.

Connectors:

There are 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.

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

2.Gender changers - convert a male connector to a female connector or vice versa. They do so WITHOUT changing the pin-to-pin wiring.

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