Teledyne 300 instruction manual Connectors, Cables & Adapters come, in 4 general types, Signal

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	Cables & Adapters come
1	Not Used
		in 4 general types
2	Transmit Data
3	Receive Data	1. Cables - cables are provided in
4	Not Used	various lengths from 6 to 50 feet. In
5	Signal Ground	most cases they have a male
6	Not Used	connector at one end and a female at
7	Data Set Ready (DSR)	the other.	Variations on this are
8	Request to Send (RTS)	ones that provide both a cable and
9	Not Used	adapter.	For example the cable

RS-232 PIN ASSIGNMENTS	provided with our analyzer adapts a
	female DB-9 to a male DB-25
FIGURE B.1
	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.

P/N 02163G1 Teledyne API Model 300 CO Analyzer Instruction Manual - Page 111