TXD and RXD are the same and there's some other partial similarities. Here's a plug pinout from one of their several arrangements - it's notable for being different from but similar to the Dell arrangement above. Here's an interesting page from Unitronics they have a number of somewhat different "arrangements" Our high quality DB-9 and DB-25 cables offer the highest quality and reliability for a variety of serial (RS-232) or parallel (IEEE 1284) applications. H2Ns page describing their RJ11 serial pinout and connections for interfacing to other equipment RTS may toggle or play around during startup.Įxamples - these are useful mainly to show how thoroughly non standard the various arrangements are. Depending on equipment TXD may have data burst. It is commonly used for serial communications, such as RS-232 or RS-422, and is also known as a DE-9 connector or a serial port connector. If more than one low line one may be CTS or RTS or similar. DB9 is a D-type data interface connector, with 9 pins (for the male connector) or 9 holes (for the female connector). Is any line at -5 to -12V wrt chassis ground. Each wire lead is a separate color for easy identification and they are labeled with the pin that they are connected to. Connectors with wire leads come with cable already attached. Shielded connectors prevent electromagnetic interference. Do any wires make low resistance connections with device chassis? Label as possible grounds. Assemble DB and HD connectors to replace worn out connectors. This is just an overview -m knowing the equipment brand and model or, failing that, type of equipment and intended use will help geatly. If this is not available then there are ways to proceed.įinding the pinout of a 6 pin serial connector. In this case, the very best method is to get the manufacturer's information. Worst case you may have some equipment that has a serial circuit on an RJ11 connector that you want to connect to. What are you connecting the RJ11 circuit to? What equipment? / model? / brand? Do they provide a datas sheet or connection diagram? If you do not know what the pinout you need is, who does? (Really). The reason that they left the wires uncommitted was so that you could connect them in the way that suits you. The reason that they did not connect the RJ11 connector to the DB9 is that there IS no standard way available. Pin your own modular adapter to connect your serial equipment.The answer to your question is given on the blackbox page that you referenced See examples below.Īdvising whatyou want to connect to and why may make this task FAR easier.Įxample at end of RJ11 serial data pinouts.īrief comment below on finding unknown pinouts. Note what Olin says - why do this? You may have a good reason but (as noted below) RJ11 is non standard for this purpose and you are inviting compatability problems.
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