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Øyvind Skaaden
2020-08-16 15:32:44 +02:00
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_files/sound/bss/london/manual/MAIN/2-wire mode.html Normal file
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<!doctype HTML public "-//W3C//DTD HTML 4.0 Frameset//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
<meta name="generator" content="Adobe RoboHelp 9">
<title>2-wire mode</title>
<link rel="StyleSheet" href="HtmlHelp.css" type="text/css">
</head>
<body class="ns-0 ltr">
<div id="globalWrapper">
<div id="column-content">
<div id="content">
<h1 class="firstHeading">2-wire mode</h1>
<div id="bodyContent">
<p id="siteSub">In this mode, the control inputs are internally
'pulled up' to +5V DC via a 4.7kOhm resistor. Therefore,
no external voltage source is needed to create contact
closure to ground (for switches such as mute buttons)
or resistance to ground (for other multi-state or continuous
controls such as <a href="MAINPresets.htm">Parameter Presets</a>
or faders). &#160;</p>
<h2>BLU-80/BLU-800/BLU-100 Series</h2>
<p>The diagram below shows connections for an external
switch, resistor ladder and potentiometer. &#160;Two 'common'
ground connections are provided using the 2 'C' pins to
the left of the control inputs.</p>
<p><img src="London_installation_Guide_13.png" alt="" style="border: none;" width="284" height="465" border="0"></p>
<p style="font-weight: bold;"><br>
Table of resistor values for use with Parameter Presets
or source selectors.</p>
<p><img src="ResistorValues.JPG" alt="Image:ResistorValues.JPG " title="Image:ResistorValues.JPG " style="border-width: 2px;
border-style: solid; margin-top: 0px; margin-bottom: 0px;
margin-left: 0px; margin-right: 0px;" width="528" height="268" border="2"></p>
<p>A 47kOhm-log potentiometer connected between a control
input and common will allow parameters to be controlled
linearly.</p>
</div>
</div>
</div>
</div>
<p style="margin-bottom: 0;">&#160;</p>
</body>
</html>