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+======GCA85 LocoBuffer with 15V 3A Power supply======
+[[english|{{  rocrail-logo-35.png}}]]
+[[english|Content]] -> [[hardware-en|Hardware]] -> [[hardware-en#locoio|GCA]]
+  *  [[mgv-overview-en|The GCA modules]]
+ \\
+^^^^By Peter Giling ^^^^
+===== The assembled board =====
+{{:mgv:hardware:gca85_v2_pict01.jpg?600}}
+=====Description=====
+GCA85 is mostly an exact copy of the LocoBuffer (Without USB) of John Jabour.\\
+It is added to provide an easy way to connect GCA50 units together, and also provides a 15 Volt 3 Amp power supply for the LocoIO.\\
+ \\
+====IMPORTANT NOTES====
+Always use dedicated transformer for GCA85 (16V-18V mimimum 50 VA), which is not used for anything else. \\
+Also do NOT connect brown connection (like on Marklin transformers) to any connection of GCA85 or anywhere else in the Loconet(r)!\\
+Connecting so could cause serious damage to Loco-I/O modules and PC!\\
+This of course unless some connections are specifically indicated.\\
+Copying and building this unit is very much encouraged. \\
+The responsibility of doing so, is ALWAYS totally for the user himself.\\
+It is working satisfying on many railroad tracks.\\
+I have given all efforts to make this unit safe, but even so, no responsibility can be taken for failures of any kind.\\
+===== Port settings =====
+^  Baudrate  ^  57600/19200  ^
+| Handshake |  RTS/CTS  |
+| Data bits |  8  |
+| Stop bits |  1  |
+| Parity    |  none  |
+\\
+**Remark**\\
+Baudrate is selectable with on-board dip-switch 2.
+\\
+===== Supply Power =====
+GCA85 needs 14-18 V ac  or  16-20 V dc 50 VA.\\
+The best option is a dedicated transformer / DC supply of minimal 50 VA, for full function.\\
+Less power is possible, but be sure to adapt Fuse F1 to that situation.\\
+Any questions,  ask [[peter.giling@rocrail.net|Peter]]\\ \\
+Power input connections are made to terminal J1, polarity not important.\\
+===== Connections =====
+^  Connector  ^  Description  ^
+|  J1  |  Power 14-18V ac / 16-20V dc  50 VA  |
+|  J2  |  Loco-I/O  |
+|  J3  |  Loco-I/O  |
+|  J4  |  RJ12 Loco-I/O  |
+|  J5  |  RS232  |
+===== DIP Switch settings =====
+^  Dip switch #  ^  Function ON  ^  Function OFF  ^
+|  1  |  15mA current source to LocoNet signal line  \\  **N.B.  this is default setting**  |  No current source to LocoNet signal line  |
+|  2  |  57600 Bd  |  19200  Bd  |
+|  3  |  MS100 mode  |  Loco-I/O mode  |
+ \\
+===== Current source, what is that? =====
+Click __**[[LNet_current_source-en|here]]**__ for a brief explanation about it.
+ \\
+===== Led functions =====
+^  Led  ^  ON  ^  OFF  ^  Flashing  ^
+|  1  |  Power on  |  Power off  |   --  |
+|  2  |  LocoNet fault  |  LocoNet OK  |  LocoNet communicating  |
+===== Connection cable for Loco-I/O* =====
+** The best suitable cable is Cat 5 Ethernet cable.\\
+For all cables together  a maximum length up to 200 mtrs is allowed.**\\
+ {{:mgv:hardware:mgv85_conn.pdf|GCA85 connections}}\\
+Standard full wired male to female 'extension' Rs232 cables are allowed, but up to a certain limit.\\
+It is never experienced how many can be used, but a few do not disturb the communication. \\
+Please remind that this type of cable is not able to handle the full 3A of the power supply!\\
+===== Connection cable for RS232 to PC.=====
+Any full wired standard male/female 'extension' RS232 cable is suitable.\\
+J3 (computer COM connector) could be replaced by direct USB connector.\\
+Ask [[peter.giling@rocrail.net|Peter]] for info.\\
+=====Files=====
+|{{:mgv:hardware:gca85v2_sch.pdf|Schematic V2}}  |
+|{{:mgv:hardware:gca85v2_pcb.pdf|PCBoard V2 and parts positions}}  |
+|{{:gca:gca85_v2_parts.pdf|The bill of materials}}  |
+|{{:mgv:hardware:gca85_v2_gerber.zip|The pcb-Gerber files}}  |
+|{{:gca:gca85.zip|Firmware}}|
+^ N.B. ONly complete ordered kits will be supported! ^
+===== Previous version MGV85=====
+Schematic and partslist of previous version MGV85 V1.2:
+|{{:mgv:hardware:mgv85v1.2_sch.pdf|The MGV85 schematic}}  |
+|{{:gca:mgv85_parts.pdf|The MGV85 partslist}}  |
+^ N.B. ONly complete ordered kits will be supported! ^
+==== Jumper settings MGV85 ====
+**J1**  Do not install this jumper.\\
+**J6** Set always for use with GCAxx or MGVxxx LocIo booards. Should be removed when Intellibox is connected to J4\\