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--- glossary:glossary_s [2018/09/26 09:23] – [Servo] Bob Vetterlein
+++ glossary:glossary_s [2019/02/01 10:45] – [Switch] WortingUK
@@ Line 50: / Line 50: @@
 SLiM (Simple/Small Layout implementation Model) A method of configuring a CBus layout without using a computer, this is achieved using switches which are usually built into the module concerned. Compare [[glossary_f#flim|FLiM]]\\
-[[http://www.merg.org.uk/merg_resources/cbus.php|CBus resources page]]\\
+[[https://www.merg.org.uk/merg_resources/cbus.php|CBus resources page]]\\
 ===== SMD =====
@@ Line 116: / Line 116: @@
-SSI is a Model Railway Control System family of software products offered by MERG member Graham Plowman's company 'GPP Software' in Australia…see the website 'Highly reallistic Looks and operates like real IECC (Integrated Electronic Control Centre) systems commonly used across the UK and the World. Full control of turnouts and signalling. Full interlocking support which is highly configurable. Fully implements Entry/Exit (NX) functionality and automated train driving. Simplifies and reduces the cost of your layout wiring. Simple and Easy control of your layout! '
+SSI is a Model Railway Control System family of software products offered by MERG member Graham Plowman's company 'GPP Software' in Australia…see the website 'Highly realistic Looks and operates like real IECC (Integrated Electronic Control Centre) systems commonly used across the UK and the World. Full control of turnouts and signalling. Full interlocking support which is highly configurable. Fully implements Entry/Exit (NX) functionality and automated train driving. Simplifies and reduces the cost of your layout wiring. Simple and Easy control of your layout! '
@@ Line 128: / Line 128: @@
-Star Network is a generic term that describes any network that is configured like the rays of light that radiate from a star, that is, there is a centre point and all other points radiate out from the centre.     \\ A Star Network is often recomended for use in the ground system of sensitive equipment, where each separate element is separately connected to the central ground point or 'Star Point', this is done so that individual ground currents do not flow in common wires and thus interfere with each other, probably causing crosstalk which can spoil an HiFi installation with 'Hum' or can cause unreliable operation in a digital system.
+Star Network is a generic term that describes any network that is configured like the rays of light that radiate from a star, that is, there is a centre point and all other points radiate out from the centre.     \\ A Star Network is often recommended for use in the ground system of sensitive equipment, where each separate element is separately connected to the central ground point or 'Star Point', this is done so that individual ground currents do not flow in common wires and thus interfere with each other, probably causing crosstalk which can spoil an HiFi installation with 'Hum' or can cause unreliable operation in a digital system.
 ===== Start of Day =====
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 ===== SToC =====
-Searchable Table of Contents - MERG Journal related document that allows the Journal content to be searched.  [[http://merg.org.uk/merg_journal/indices.php|Available here]]
+Searchable Table of Contents - MERG Journal related document that allows the Journal content to be searched.  [[https://merg.org.uk/merg_journal/indices.php|Available here]]
 ===== Stranded conductor =====
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-This is the Name for a set of ideas and kits started by MERG member JJ Matthews and his team which provides for automation of the principle of block control, observing signal logic and providing smooth accelerations, if required without human intervention.     \\ The TB-33 series describes and [[:kits:38|Kit #38]] to 40 provides the hardware.     \\ [[:glossary:blong|Main article]]\\ [[http://merg.org.uk/merg_resources/superbloc.php]]
+This is the Name for a set of ideas and kits started by MERG member JJ Matthews and his team which provides for automation of the principle of block control, observing signal logic and providing smooth accelerations, if required without human intervention.     \\ The TB-33 series describes and [[:kits:38|Kit #38]] to 40 provides the hardware.     \\ [[:glossary:blong|Main article]]\\ [[https://merg.org.uk/merg_resources/superbloc.php]]
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 ===== Switch =====
+A 'Switch' can have several meanings:
-A 'Switch' can have two prime engineering meanings:\\
+. The simplest is an electrical switch, as in 'Light Switch' which is a mechanically operated device used for connecting or disconnecting electrical circuits. Such switches can have many contacts and become quite complex.\\
-The simplest is an electrical switch, as in 'Light Switch' which is a mechanically operated device used for connecting or disconnecting electrical circuits. Such switches can have many contacts and become quite complex.\\
-The second meaning is the American term for a turnout or the English 'Points'…this being the scheme to allow a railway track to diverge or converge with another route. It allows the path of the train to be 'switched' from one route to another.
+. Electronic switch such as a transistor, FET or TRIAC. A semi conductor which goes from a very high resistance to a very low resistance when a control input changes.
+. Electro mechanical switch such as a relay or a contactor. A switch operated by a lower powered circuit.
+. American term for a turnout or the English 'Points'…this being the scheme to allow a railway track to diverge or converge with another route. It allows the path of the train to be 'switched' from one route to another.
 ===== Switch machine =====