87 lines
3.3 KiB
HTML
87 lines
3.3 KiB
HTML
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<!doctype HTML public "-//W3C//DTD HTML 4.0 Frameset//EN">
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
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<meta name="generator" content="Adobe RoboHelp 9">
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<title>Logic Outputs</title>
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<link rel="StyleSheet" href="HtmlHelp.css" type="text/css">
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<style title="hcp" type="text/css">
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<!--
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img.hcp1 { border-width:2px;
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border-style:solid;
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margin-top:0px;
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margin-right:0px; }
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span.hcp2 { font-weight:bold; }
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-->
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</style>
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</head>
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<body class="ns-0 ltr">
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<div id="globalWrapper">
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<div id="column-content">
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<div id="content">
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<h1 class="firstHeading">Logic Outputs</h1>
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<div id="bodyContent">
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<p id="siteSub"> <br>
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<img src="LogicOutputLED.JPG" alt="image:LogicOutputLED.JPG" title="image:LogicOutputLED.JPG" width="34" height="40" border="2" class="hcp1"></p>
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<p>An LED control is the typical object that is assigned
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to a logic output.</p>
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<p>The logic outputs can be used to drive indicators or
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third party devices. For example Logic Outputs can trigger
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infra-red commands (to control DVD players etc) or power
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relays to turn other equipment on or off. The logic output
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can source 10mA, and sink 60mA.</p>
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<p> </p>
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<ul>
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<li class="p"><p>Current source:</p></li>
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</ul>
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<p>This is intended for LEDs. The unit can supply up to
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10.5mA at around 5V. An LED can be connected directly
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without the need for a current limit resistor. When assigning
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the Control or LED to the port in London Architect, set
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the control port for normal mode.</p>
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<p><img src="Current_source.jpg" alt="Image:Current source.jpg" title="Image:Current source.jpg" width="261" height="165" border="2" class="hcp1"></p>
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<p> </p>
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<ul>
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<li class="p"><p>Current sink:</p></li>
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</ul>
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<p>This is intended for relays and higher power devices.
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The unit can sink up to 60mA from an external supply.
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If more current is driven into the port, the control port
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automatically decreases its ability to sink current, protecting
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the circuitry. As there is hysteresis within this circuit,
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the full sink capability will not return until current
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is decreased to below 60mA. When assigning the Control
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or LED to the port in London Architect, set the control
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port for inverted mode.</p>
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<p><img src="Current_sink.jpg" alt="Image:Current sink.jpg" title="Image:Current sink.jpg" width="262" height="165" border="2" class="hcp1"></p>
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<p> </p>
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<h2>See Also</h2>
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<p><a href="BLU-GPX_BLU-GPZ/Assigning_Control_Ports.htm">Assigning
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Control Ports</a></p>
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<p>Assignment of Logic Outputs is similar to assigning
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control inputs.</p>
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<p>When assigning this object to the control port, a dialog
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will ask if you want the action to be:</p>
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<ul>
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<li class="p"><p><span class="hcp2">Normal</span>
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(Control or LED in the ON state, causing the logic
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port to go High, +5v)</p></li>
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</ul>
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<p>or</p>
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<ul>
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<li class="p"><p><span class="hcp2">Inverted</span>
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(Control or LED in the ON state, causing the logic
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port to go Low, 0v).</p></li>
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</ul>
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</div>
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</div>
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</div>
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</div>
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<p style="margin-bottom: 0;"> </p>
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</body>
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</html>
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