The diagram at right shows how to connect a DIN-8 (top) to a DB-25 (below). Fortunately for this purpose, we need only be concerned with three of them: Ground, RxD (receive data), and TxD (transmit data). The various RS232 pins go by a confusing variety of names. Connect as for the Mac substituting per the pin-out table above. Most common are DB-25 (right, top) and DB-9 (bottom) they are shown here looking at the pins from the end of the male connector. Other computers use a variety of different connectors. (Crossing lines connect only where a dot is shown) Other Computers
For the other one, connect pin 6 to pin 3, pin 2 to pin 5, and the common ground pin 4 to pin 4. This is useful if, for example, you want to connect to a computer and your CCD camera at the same time.Ĭonnect one connector as above. Thus you can make two simultaneous RS232 connections to your scope.
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Though they are labeled as “Unused” in the LX200 manual pins 2 and 6 are actually an extra RS232 port (pin 4 is a common ground). (Crossing lines do not connect) Making a Dual Cable (The exact correspondence of numbers is purely accidental.) Connect pin 3 to pin 3, pin 4 to pin 4, and pin 5 to pin 5. Making a cable is just a matter of wiring up the connectors with matching colors as shown below. The pins are usually labeled in tiny raised letters. Of course, it’s a mirror image of the diagram of the port.
The diagram at left shows the pins from the end of the male plug. The Macintosh’s modem and printer ports use a DIN-8 jack as shown at right looking into the Mac. Note the odd pin numbering: 1-4-2-5-3-6, read left to right looking into the port (This numbering is taken from the LX200 User’s Manual, don’t expect to see it elsewhere.)Īt left is the corresponding 6-pin modular plug (RJ11) viewed from the flat side (top as it is inserted into the LX200 not the end) the connecting pins are on top, the tab on the bottom of the diagram represents the wire. In the diagrams below the colors indicate which pins connect to each other.Īt right is a diagram of the LX200’s RS-232 port as you see it looking into the panel. Pin-outsįor those of you who know what you’re doing all you need to know is the pinouts: Description All you need is a soldering iron, the appropriate connectors and the information below. The parts only cost a few dollars and it will take only a few minutes. You can sometims buy one from the company that makes the software you’re using but it’s much cheaper to make one for yourself. To connect an LX200 to a computer you need a special cable.