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+====== CAN-GC2G Multi functional I/O node for CANBUS ======
+[[english|{{  rocrail-logo-35.png}}]]
+[[:english|Content]] -> [[:hardware-en|Hardware]] -> [[:hardware-en#gca-cbus|CANBUS]]
+  * [[:cbus:overview-en|CAN-GC Overview]]
+  * [[:can-gca1-en|CAN-GC1]] | [[:can-gca1e-en|CAN-GC1e]] | [[:can-gcln-en|CAN-GCLN]] | [[:can-gca2-en|CAN-GC2]] | **[[:can-gca2G-en|CAN-GC2G]]** |  [[:can-gc3-en|CAN-GC3]] | [[:can-gc4-en|CAN-GC4]] | [[:can-gca5-en|CAN-GC5]] | [[:can-gc6-en|CAN-GC6]] | [[:can-gc7-en|CAN-GC7]] | [[:can-gc8-en|CAN-GC8]]
+    * [[:cbus:can-gca2-firmware|Firmware]]
+    * [[:english#interfaces|Interfaces]]
+ \\
+^Copyright Peter Giling^
+=====Firmware Copyright=====
+Copyright(c) MERG and Rocrail.\\
+Commercial use is prohibited.\\
+|  {{:gca:can-gc2g_pict_02.jpg?300}}|
+ \\
+The CAN-GC2G is an alternative to the CAN-GC2 with integrated drivers, useable as a complet unit without \\
+extra drivers, running on the CANBUS open source CAN standard. \\
+This unit enables direct connection of the following peropheral:
+  * 2 x Turnout output for single coil units.
+  * 8 x Low impedance input for Hall sensors or reed contact
+  * 3 or more free configurable I/O ports
+  * High current switch for reverse loop control
+ \\
+===== The pcboard =====
+|   {{:can-gc2g_pict_03.jpg?400}}   |
+A jumper makes it possible to set terminator on the last board in the CANBUS chain.\\
+This jumper connects a 120 Ohm resistor to the Merg CBUS.\\
+The base for creation this board is to make use of CBUS easier for garden railroad.\\
+It does basically not need anything else to control 2 turnouts with single 24V coil\\
+Any other voltage up to 24V dc is possible.\\
+Further more 8 inputs are pre conditioned for use with Hall sensor or reed contact,\\
+and addionally there is place and control for two relays with 10Amp contacts to be able to reverse the rail power inside a reverse loop.\\
+These relays will be controlled by Rocrail, direct control via reed contact or Hall sensor is also optional.\\
+Power, as available in Merg CBUS-cable, is only used for supply of CANBUS board itself.\\
+The reverse loop relays and the outputs for turnout need 24 V by standard.\\
+Adaption to lower voltage needs different 10Amp relays.\\
+As a standard recommandation for all CAN systems, connection and disconnection of cables is not possible while system is running.\\
+Cable connection is done in the same way as standard with Merg CBUS, by screw terminals\\
+Extra supply connection for 24V is also available.\\
+Specially for outside use in humid weather conditions a heating resistor is also situated at the back side of the board.\\
+A few degrees warmer inside the box, compared to outside conditions, will do miracles for the board.\\
+However is advisable to be sure the box where this board is placed, is very seriously closed and IP66 waterproof.\\
+\\
+\\
+===== The schematic =====
+The principle of this board is equal to CAN-GC2. It uses the same firmware.\\
+IC1 is main processor, taking care for all ports.\\
+IC2 is the CAN driver, that takes care for correct handling of the CBUS.\\
+IC3 is the same processor as used on GCA173 and GCA179, with almost the same firmware.\\
+IN1.. In8 connections can be used for Hall sensors or reed contacts.\\
+The impedance is speciall kept as low as 470 Ohm , to suppress distorsion on longer (<3m) lines.\\
+The fimware in IC3 will make sure that also short pulses specially with reed contacts,\\
+create a solid contact info to IC1.\\
+Ports 9..12 have a double function.\\
+Initially they are connected to the outputs of IC3 for IN5..In8.\\
+But is also possible to use them as output ports.\\
+To avoid conflicts between IC1 and IC3, when both are cionfigured as output, resistors R12.. R15 will\\
+protect these ports.
+When port is configured as output, IC3 will not have any incfluence on that port.\\
+Turnout 1 and 2 are switched by relays K1..K4.\\
+The type of the motors of these turnouts are of single coil type.\\
+Combination of relay 1 & 2 , -or 3 & 4-, will switch +/- or -/+ depending on desired direction of turnout.\\
+Pulse length can be programmed as with CAN-GC2.\\
+VDR1 and VDR2 are very important, and will suppress inductive fly-back from the turnout coil, to avoid distorsion into th total system.\\
+\\
+Reverse loop switch can be used to reverse the rail power in a loop, when needed.\\
+Always 1 of two relays will be switched ON.\\
+Rocrail can be programmed in routes (commands) to set the correct polarisation.\\
+It is also possible to use two inputs IN7 & IN8 to set these polarisation with reed contacts or hall sensors.\\
+This is specially nice if you want to control you trains manually,\\
+and do not have to worry about correct polarisation by entering or leaving the reverse loop.\\
+These feature needs different firmware for IC3.\\
+If you are intersted in that option, ask [[peter@phgiling.net|Peter]].\\
+===== The hardware =====
+|  {{:gca:can-gc2g_sch.pdf|The schematics}}  |
+|  {{:can-gc2g_pcb.pdf|The pcboard and parts positions}}  |
+|  {{:gca:can-gc2g_parts.pdf|The partslist}}  |
+|  {{:can-gc2g_gerber.zip|Gerber files}}  |
+^ N.B. Only complete ordered kits will be supported! ^
+\\
+=====Connections=====
+CanBus is a 4 wire cable, where both CAN+ and CAN- lines shopuld be twisted all over the full length.\\
+The best cable for that purpose is a a widely available CAT5 cable.\\
+Shield is Ok but for up to 200 mtrs not needed.\\
+Connections on CAN-GC2G and CAN-GC1e are identical\\
+Two more terminals, indicated as POWER2, are for the 24V dc to be used for turnouts and reverse loop relays.\\
+This 24 V can be feeded over the same CAT5 cable with a twisted pair.
+Ground of Power 1 and power 2  should be linked.\\
+This means that , unkless special precaution is made on CAN-GC1e, it is NOT possible\\
+to supply CAN-GC1e and power 2 with the same power supply.\\
+ \\
+===== Configuration of ports =====
+Though the firmware of this CAN-GC2G is equal to CAN-GC2, it has a number of pre-defined ports.\\
+Adresses for turnouts should be in following order\\
+^  Port #  ^  Function  ^  Input/Output  ^  pulse/switch  ^  Connection  ^  Remarks  ^
+|  1  |  Turnout 1a  |  output  |  Pulse  | Turnout 1  |   |
+|  2  |  Turnout 1b  |  output  |  Pulse  | Turnout 1  |   |
+|  3  |  Turnout 2a  |  output  |  Pulse  | Turnout 2  |   |
+|  4  |  Turnout 2b  |  output  |  Pulse  | Turnout 2  |   |
+|  5  |  Sensor 1  |  input/block  |  x  |  IN1  |  |
+|  6  |  Sensor 2  |  input/block  |  x  |  IN2  |  |
+|  7  |  Sensor 3  |  input/block  |  x  |  IN3  |  |
+|  8  |  Sensor 4  |  input/block  |  x  |  IN4  |  |
+|  9  |  Sensor 5  |  input/block  |  x  |  IN5  |  also as free I/O at J3 pin3  |
+|  10  |  Sensor 6  |  input/block  |  x  |  IN6  |  also as free I/O at J3 pin4  |
+|  11  |  Sensor 7  |  input/block  |  x  |  IN7  |  also as free I/O at J3 pin5  |
+|  12  |  Sensor 8  |  input/block  |  x  |  IN8  |  also as free I/O at J3 pin6  |
+|  13  |  Free I/O  |  input/output  |  free  |  J3 pin 7  |  |
+|  14  |  Free I/O  |  input/output  |  free  |  J3 pin 8  |  |
+|  15  |  Free I/O  |  input/output  |  free  |  J3 pin 9  |  |
+|  16  |  reverse loop switch  |  output  |  switch*   |   Reverse loop  \\  or J3 pin 10  |  If relays K5 and K6 are not installed, \\  port 16 is open like Port 15.  |
+\\
+*  Port 16 should be programmed as single output for use with reverse loop.
+\\
+\\
+===== Led functions =====
+^  L1*  ^   L2  ^  L3*  ^
+|  Can bus activity  |  Programming activated  |  Unit running  |
+*  leds are blinking
+===== PB1 functions =====
+^ PB1 ^ Function ^
+| After power on |  Switch to learn mode for setting a node number.  \\  A second push will leave this mode.  |
+ \\
+===== Connector J3 10pin header =====
+^ LocoIO port ^ Pin #  ^
+|  +5V  |  1  |
+|  GND  |  2  |
+|  9  |  3  |
+|  10  |  4  |
+|  11  |  5  |
+|  12  |  6  |
+|  13  |  7  |
+|  14  |  8  |
+|  15  |  9  |
+|  16  |  10  |
+===== Direct connection of leds to outputs=====
+[[http://wiki.rocrail.net/doku.php?id=mgv-overview-en#direct_connection_of_led_s|Led connection]]
+\\
+===== Reed switches and hall sensors =====
+Read switches and hall sensors can be used as feed-back sensors.\\
+They will be connected to IN1 to IN8, which numbers correspondent to I/O Port 5.. I/O Port 12.\\
+Reed contacs are connected to point **-** & **s** on each connector.\\
+The CAN-GC2G provides an extra processor, to be able to time all -even very short- pulses from reed-contact\\
+to a reasonable longer pulse, to enable the CAN processor to read this info correctly.\\
+Input impedance is kept low, to limit distorsions on longer lines (Max 3 meters) form the sensors.\\
+===== Setup =====
+====Reset EEPROM====
+Hold down the button at power on to reset/initialize the EEPROM with following settings:
+  * port 1-8 switch with address 1-8
+  * port 9-16 block with address 9-16
+The same can be achieved by sending a **[[:cbus:flim-en#clear_all|Clear]]** command.\\
+====Set====
+Set the first found change. This button must be pushed multiple if more then one port or setting is changed.\\
+The sequence of change check is:
+  - Ports
+  - Node configuration
+  - SoD
+====Set all====
+Set all ports and options.\\
+====Save output state====
+Write the output state in EEPROM after detecting a **power off command** on the CANBUS.\\
+The outputs will be restored after the [[:can-gca2G-en|CAN-GC2G]] is powered on.\\
+====Short events====
+Ignore the event node number and compare the event number only.\\
+====Long events====
+For long events the BUS variable on the interface tab of sensors, switches and other objects is used to address the module its node number.\\
+The address variable is equal to the one used with short events.\\
+====SoD====
+**"Start of Day"**\\
+The [[:can-gca2-en|CAN-GC2]] will report the status of every input after receiving an accessory command with this address. (Short event)\\
+The SoD address should be the same as set for the __**[[:cbus-en#sod|Controller]]**__ and can be tested with the **SoD** button.\\
+====Node Nr.====
+For outputs with long events only.\\
+Inputs will use the **[[:cbus:flim-en#node_number|CAN-GC2]]** node number for events.
+====Port types====
+^ Type ^^ Description ^ Recommendation ^
+| **IN** | Input | Normal input port. | Push buttons, feedback of servos/points and hall sensors. |
+| **BK** | Block | Input with a 2 seconds delayed off. (±50ms) | Occupancy detectors. |
+| **SW** | Switch | Continuous output. | Single coil switch drivers like servos. |
+| **PU** | Pulse | Output with x ms activation time. (±50ms) | Note: A [[:switch-int-en#switch_time|software timed off]] is not possible with CANBUS; It is realized in the hardware. | \\
+====Pulse time====
+Activation time for pulse type outputs.\\
+====Inv====
+Inverts the port.\\
+ \\
+====Test====
+Every port has a test button in which also the current state is displayed as a "1" or "0".\\
+The state is only updated after pushing a test button.\\
+ \\
+====Usage====
+Shows the Rocrail object ID which is linked to this port.\\
+ \\
+=====Node Variables=====
+^ NV# ^ Purpose ^
+|  1  | General configuration |
+|  2...17  | Port configuration |
+|  18  | CAN ID |