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+====== GCA107 Multi purpose Relay board======
+[[english|{{  rocrail-logo-35.png}}]]
+[[english|Content]] -> [[hardware-en|Hardware]] -> [[hardware-en#interfaces|GCA]]
+  *  [[mgv-overview-en|The GCA Family]]
+ \\
+^^^^By Peter Giling ^^^^
+ \\
+===== Description =====
+There are quite a few situations, where we need to switch AC.\\
+Most will have to do with just using a transformer for powering a turnout, mechanical signal or decoupler.\\
+[[mgv76-en|GCA76]] and [[mgv77-en|GCA77]] are suitable to switch these units, but only with DC.\\
+Also to be able to switch a frog on a turnout, a relay is mostly the only way to do it in a reliable way.\\
+Relayboard [[mgv137-en|GCA137]] is made for that purpose only, but it will not suit the GCA-PIxx RocNet units.\\
+The relay board as presented here, is a more universal module.\\
+It contains 8 relays, which can be used for various situations.\\
+  * 4 pairs of relays to switch 4 turnout frogs. Relays are switching the railpower, which is also AC in digital systems.
+  * 4 pairs of relays to switch turtoise or hoffmann turnout drives, also switching ac.
+  * 8 individual relays to switch anything you can think of, as long as it is no more than 42 Volts and/or 1 ampere.\\
+ \\
+Selection of different tasks is made by a set of 5 jumpers with each pair of relays.\\
+The maximum current demand for this board with all relays activated = 240 mA.\\
+In most situations only half of the relays are switched on, with pulse output almost none.\\
+It should be considered with this the total current, that a voltage regulator on either CAN-GC2 board or GCA50 should be able to handle that..\\
+Be sure on these boards that 5V regulator IC is mounted with nut in between pc-board and IC, to improve cooling.\\
+This is also mentioned on the partslist.\\
+If it is used with GCA_PI02, the RocNet network needs an adequate supply like GCA_PI06.\\
+ \\
+Professional made boards are available.\\
+Single boards or complete kits.  See [[GCA:gca-index-en|GCA]] \\
+ \\
+===== The assembled board =====
+|  {{:gca:gca107_jumpers.jpg?600}}  |
+=====Hardware=====
+|{{:gca:gca107_sch.pdf|The schematics}}  |
+|{{:gca:gca107_pcb.pdf|The pcboard and parts positions}}  |
+|{{:gca:gca107_parts.pdf|Bill of materials}}  |
+^ N.B. Only complete ordered kits will be supported! ^
+\\
+===== Jumper settings =====
+Each pair of relays can have different tasks either together or standalone, selectable by jumpers.\\
+To select a task, use these diagrams.\\
+^  Task relays 1+2  ^  Jumper  ^^^^^  connections  ^  ^
+|  | JP1  |  JP2  |  JP3  |  JP4  |  JP5  |  |  |
+|  Turnout frog switches  |  yes  |  no  |  pos 2  |  no  |  yes  |  Connect frog to J1 pt 2  \\  Railpower to RP1  |  Left on picture above  |
+|  2 relays for turtoise turnout  |  yes  |  yes  |  pos 1  |  yes  |  no  |  connect Motor to J1 pt 2+3 \\  Power to RP1  |  |
+|  2 relays for Märklin turnout drive  |  yes  |  no  |  pos 1  |  no  |  no  |  trafo brown connect to R  |  Turnout drive connections :  \\  yellow to trafo yellow  \\  blue(1) to J1 Pt2  \\  blue(2) to J1 Pt3  |
+|  2 individual relays  |  no  |  no  |  no  |  no  |  no  |  Relay 1 connect J1 pt 1+2 \\  Relay 2 connect J1 pt 3+4  |  |
+\\
+^  Task relays 3+4  ^  Jumper  ^^^^^  connections  ^  ^
+|  |  JP11  |  JP12  |  JP13  |  JP14  |  JP15  |  |  |
+|  Turnout frog switches  |  yes  |  no  |  pos 2  |  no  |  yes  |  Connect frog to J2 pt 2  \\  Railpower to RP1  |  |
+|  2 relays for turtoise turnout  |  yes  |  yes  |  pos 1  |  yes  |  no  |  connect Motor to J2 pt 2+3 \\  Power to RP1  |  2nd from left on picture above  |
+|  2 relays for Märklin turnout drive  |  yes  |  no  |  pos 1  |  no  |  no  |  trafo brown connect to R  |  Turnout drive connections :  \\  yellow to trafo yellow  \\  blue(1) to J2 Pt2  \\  blue(2) to J2 Pt3  |
+|  2 individual relays  |  no  |  no  |  no  |  no  |  no  |  Relay 3 connect J2 pt 1+2 \\  Relay 4 connect J2 pt 3+4  |  |
+\\
+^  Task relays 5+6  ^  Jumper  ^^^^^  connections  ^  ^
+|  |  JP21  |  JP22  |  JP23  |  JP24  |  JP25  |  |  |
+|  Turnout frog switches  |  yes  |  no  |  pos 2  |  no  |  yes  |  Connect frog to J3 pt 2  \\  Railpower to RP1  |  |
+|  2 relays for turtoise turnout  |  yes  |  yes  |  pos 1  |  yes  |  no  |  connect Motor to J3 pt 2+3 \\  Power to RP1  |  |
+|  2 relays for Märklin turnout drive  |  yes  |  no  |  pos 1  |  no  |  no  |  trafo brown connect to R  |  Turnout drive connections :  \\  yellow to trafo yellow  \\  blue(1) to J3 Pt2  \\  blue(2) to J3 Pt3  |
+|  2 individual relays  |  no  |  no  |  no  |  no  |  no  |  Relay 5 connect J3 pt 1+2 \\  Relay 6 connect J3 pt 3+4  |  3rd from left on picture above  |
+\\
+^  Task relays 7+8  ^  Jumper  ^^^^^  connections  ^   ^
+|  |  JP31  |  JP32  |  JP33  |  JP34  |  JP35  |  |  |
+|  Turnout frog switches  |  yes  |  no  |  pos 2  |  no  |  yes  |  Connect frog to J4 pt 2  \\  Railpower to RP1  |  |
+|  2 relays for turtoise turnout  |  yes  |  yes  |  pos 1  |  yes  |  no  |  connect Motor to J4 pt 2+3 \\  Power to RP1  |  |
+|  2 relays for Märklin turnout drive  |  yes  |  no  |  pos 1  |  no  |  no  |  trafo brown connect to R  |  Turnout drive connections :  \\  yellow to trafo yellow  \\  blue(1) to J4 Pt2  \\  blue(2) to J4 Pt3  |
+|  2 individual relays  |  no  |  no  |  no  |  no  |  no  |  Relay 7 connect J4 pt 1+2 \\  Relay 8 connect J4 pt 3+4  |  right on picture above  |
+\\