Gemini-2-com/Losmandy_Serial_Cable.html at master · PKAstro/Gemini-2-com · GitHub

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<title>GCC GEM 2 with the RS232 serial cable</title>

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		<a href="gemini-images/RS232/G-2_Serial.jpg" target="_blank">
		<img alt="" height="568" src="gemini-images/RS232/G-2_Serial_small.jpg" width="900" /></a><br />
		Click on image for larger view<br />
		The Losmandy GCC GEM 2 serial cable.<br /><br /></td>
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</table>
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		<td class="style7"><a href="gemini-images/RS232/DB9F-RJ12_Adapter.jpg" target="_blank">
		<img alt="" class="auto-style3" height="675" src="gemini-images/RS232/DB9F-RJ12_Adapter_small.jpg" width="900" /></a><br />
		Click on image for larger view</td>
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		The pictures above are from the Losmandy supplied Serial Port
		cable GCC GEM 2 with the RS232 end taken apart to show how it was made.&nbsp;&nbsp;You
		can purchase it from Losmandy Part number GCC Gem 2 on the
		<a href="http://www.losmandy.com/access.html" target="_blank">accessory
		page</a> or make your own.&nbsp; Losmandy may change the manufacture and
		color of the DB9F to RJ12 adapter they use.&nbsp; That is up to them.<br />
		<br />
		Notice that the Green wire in the above drawing has the red wire tapped
		into it.&nbsp; These are the two center pins on the RJ12 connector and
		they are wired to pin 5 of the RS-232 plug.&nbsp;&nbsp; This is the
		ground signal from the Gemini-2.&nbsp; Note: the above color codes do
		not match the ones I used on the <a href="cable_wiring.html">Serial Cable
		Wiring Page</a> to show how to wire from the RS232 jack to the RJ12
		Telephone connector.&nbsp; Every manufacture of DB9M to RS232 adapters use
		different color codes, so there is really no way for me to match colors.<br />
		Here is a few of other manufactures of DB9F to RJ12 adapters
		(unwired):</td>
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		<ol><li>
			<a href="http://www.frys.com/product/2402370?site=sr:SEARCH:MAIN_RSLT_PG" target="_blank">Fry's Electronics 2402370</a></li>
			<li>
			<a href="https://www.cablewholesale.com/specs/db9-to-rj12/31d1-16400.htm" target="_blank">
			Cable Wholesale 31D1-16400</a></li>
			<li><a href="http://www.sfcable.com/31D1-A2.html" target="_blank">
			SFcable.com 31D1-A2</a></li></ol>
		</td>
				<td class="style6" width="550px">
			<img alt="DB9 for G1" src="gemini-images/Images/G1RS232.gif" />
			&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
			<img alt="" height="106" src="gemini-images/Images/RJ12Mode1-2.jpg" width="174" />
			<br/><br/>
			Follow the color coded for Gemini 2 RS232cable wiring
			<br/>
				The RS-232 connector is a Female DB-9 connector. <br />The telephone connector is a RJ-12 connector.
			<!--This is a <a href="downloads/Wiring/RS-232_Cable_Wiring_Diagram.pdf">schematic</a> of the Mode 1 and 2 cable wiring.
			<br /><br /> -->
			&nbsp;The color code is from the DB9F connector to the RJ12 end that
				goes into the Gemini-2.<br />
			</td>


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			Of course you have to wire them
		correctly, and then add the telephone cable (6 wire) with each end put on correctly
			to match how the DB9F to RJ12 was wired.&nbsp; Please note that all
		of these do not follow the same color code.&nbsp; I know for a fact that
		#1 and #2 are backwards to each other, or at least was when I was making
		and selling Gemini-1 cables.&nbsp; I suggest that if you are not good at
		following the logic behind wiring up the DB9F to RJ12 adapter and making
		a RJ12 to RJ12 cable, then please order one from Losmandy.</td>
	</tr>
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