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gca500-en
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| + | ====== GCA500 LNet 16 bits I/O interface with SUBD-9 and RJ12 sockets ====== | ||
| + | |||
| + | [[english|{{ rocrail-logo-35.png}}]] | ||
| + | [[english|Content]] -> [[hardware-en|Hardware]] -> [[hardware-en#locoio|GCA]] | ||
| + | * [[mgv-overview-en|The GCA Modules]] | ||
| + | * [[:lnsv-en|Setup dialog]] | [[:loconet:lio-sw:lio-sw|Setup protocol]] | ||
| + | |||
| + | {{ :gca:gca500_pict01.png?230}}{{ :gca:gca500_pict02.png?250}} | ||
| + | \\ | ||
| + | |||
| + | ^^^^By Peter Giling ^^^^ | ||
| + | ===== Unit is made on the same basics as GCA50 ===== | ||
| + | GCA50 was originally made for Modelspoor Groep Venlo (MGV) to be used for the modules of the large layout with K-rails from Märklin.\\ | ||
| + | Because these modules were frequently be separated, transported and joined together on various shows, the choice was made to use\\ | ||
| + | Sub-dconnectors instead of the mechanical rather weak RJ12 connectors.\\ | ||
| + | Also because of the large amount of GCA50 units ( up to 90 !) the current in a RJ12 connector and cable was rather limited.\\ | ||
| + | But more and more people prefer the use of RJ12 cable, so together with the creation of GCA51 for RFID, the GCA50 was created with RJ12 connectors, and called GCA500.\\ | ||
| + | The pictures on top show the two options: | ||
| + | * only two RJ12 connectors. | ||
| + | * SUB-d male and female and one RJ12, | ||
| + | \\ | ||
| + | |||
| + | ===== Hardware ===== | ||
| + | |||
| + | | {{:gca500_sch.pdf|The schematic design}} | | ||
| + | | {{:gca500_pcb.pdf|The printed circuit board with part positions}} | | ||
| + | | {{:gca500_parts.pdf|The bill of materials}} | | ||
| + | \\ | ||
| + | ===== Connections and port information ===== | ||
| + | Please refer to GCA50. | ||
| + | \\ | ||
| + | |||
| + | ===== Jumper setting ===== | ||
| + | JP1 is used for reporting startup situation.\\ | ||
| + | When GCA500 is powered up, it will report the logical situation of all ports which are configured as input.\\ | ||
| + | When JP1 is set, this report will be aborted, which can be useful for some slow starting systems.\\ | ||
| + | GCA85 or GCA101, together with Rocrail, will not have that restriction, so you can leave the jumper off.\\ | ||
| + | \\ | ||
| + | ===== Other differences between GCA50 and GCA500 ===== | ||
| + | ON GCA500 a serial resistor R14 in the lococNet communication line is added, to avoid damage in T1 , when wrong connections are made (cable faults).\\ | ||
| + | R14 lowers the total current through T1 in order to keep it in good health.\\ | ||
| + | The power regulator VR2(7805 TO-220) can also be replaced by VR1 (= R-78E5).\\ | ||
| + | This switching regulator can handle up to 1 Amp constant current, with very low loss of energy in heating.\\ | ||
| + | For larger setups with many units, this is preferable because it takes about 60% less load from the 12 Volt power supply.\\ | ||
| + | Also, when one or two GCA107 boards are connected, and many relays continiously activated, the VR1 is needed.\\ | ||
| + | |||
| + | \\ | ||
| + | |||
| + | ===== Fits in Littfinsky LDT-1 box ===== | ||
| + | Same as GCA51, the GCA500 is also useable to be fixed in a Littfinsky LDT-1 box.\\ | ||
| + | These boxes are available from | ||
| + | * Littfinsky http://www.modellbahndiskont.at/AUSLAUFMODELLE/Digital/Littfinski-000104-Gehaeuse-LDT-01.htm?shop=modellbahn&SessionId=&a=article&ProdNr=LDT000104&t=4718&c=9027&p=9027 | ||
| + | |||
gca500-en.txt · Last modified: 2018/11/12 08:56 (external edit)
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