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gca125-proto-en
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| + | ====== GCA125 Interface for motordriven turnouts ====== | ||
| + | [[english|{{ rocrail-logo-35.png}}]] | ||
| + | [[english|Content]] -> [[hardware-en|Hardware]] -> [[hardware-en#interfaces|GCA]] | ||
| + | * [[mgv-overview-en|The GCA modules]] | ||
| + | |||
| + | \\ | ||
| + | |||
| + | ^^^^By Peter Giling ^^^^ | ||
| + | |||
| + | ==== Features and facts ==== | ||
| + | |||
| + | 8 individual inputs, commanding 8 individual outputs | ||
| + | |||
| + | 600 mA max load per output. | ||
| + | |||
| + | Max 42 Volt per output. | ||
| + | |||
| + | 8 individual inputs. | ||
| + | |||
| + | Time selection for output duration. | ||
| + | |||
| + | Outputs are activated one by one for power reduction. | ||
| + | |||
| + | ===== The prototype ===== | ||
| + | {{:mgv:hardware:gca125_pict01_mk.jpg?600}} | ||
| + | |||
| + | ===== Description ===== | ||
| + | |||
| + | Controlling a LGB 1201, Kato or Fulgurex turnout-drive, in fact also some type of Hoffmann turnout motors, only have one coil or motor, that needs to be controlled by polarity.\\ | ||
| + | Even the Bohler WA2 is very nicely useable with this interface.\\ | ||
| + | The normal driver like GCA77 is not suitable for that.\\ | ||
| + | The complexity of this unit is slightly higher.\\ | ||
| + | In the GCA units, it is standard, to separate the power, needed to activate the coils and the LocoNet system by means of optocouplers.\\ | ||
| + | This unit is able to control 8 turnouts, and need 8 inputs from the GCA50.\\ | ||
| + | So 2 units, capable of a total of 16 turnouts, are commanded by 1 GCA50.\\ | ||
| + | It is also possible to use a switch for direct activation without GCA50. \\ | ||
| + | You will need a 5-12Vdc to activate the opto-couplers.\\ | ||
| + | The software in the PIC16F62x is made in such a way that the processor provides a correct timing for the coil, and switch it off after the chosen time.\\ | ||
| + | This will take care that the turnout coil will not be overheated by too long powering.\\ | ||
| + | The time selection is done with the Dipswitch.\\ | ||
| + | The processor in the circuit needs 8 inputs and 16 outputs, and 3 extra for dip-switch reading. \\ | ||
| + | The smaller PIC processors have only maximum 16 I/O.\\ | ||
| + | Therefore I used I2C expanders , making a small processor suitable.\\\\ | ||
| + | |||
| + | |||
| + | |||
| + | |||
| + | |||
| + | ===== The hardware files ===== | ||
| + | |{{:mgv:hardware:mgv125-sch.pdf|The schematics}} | | ||
| + | |{{:mgv:hardware:mgv125-pcb.pdf|The pcb Layout}} | | ||
| + | ^N.B. Self made pc-boards are not supported! ^ | ||
| + | |||
| + | ===== Cable to MGV50 / CAN-GC2 ===== | ||
| + | |||
| + | refer to: | ||
| + | [[PSK-Interface connections-en|**Connection interfaces**]] | ||
| + | |||
| + | ===== Firmware ===== | ||
| + | {{mgv:hardware:mgv125.zip|program files}} | ||
| + | |||
| + | ===== Time delay settings ===== | ||
| + | SW1 is used to set the delay time after which the output will be swotched off. | ||
| + | |||
| + | ^ Delay table ^ ^ ^ ^ | ||
| + | | Delay in Sec | SW1 1 | SW 2 | SW 3 | | ||
| + | | 0.1 | Off | Off | Off | | ||
| + | | 0.2 | Off | Off | On | | ||
| + | | 0.4 | Off | On | Off | | ||
| + | | 0.8 | Off | On | On | | ||
| + | | 1.6 | On | Off | Off | | ||
| + | | 3.2 | On | Off | On | | ||
| + | | 6.4 | On | On | Off | | ||
| + | | 12.8 | On | On | On | | ||
| + | |||
| + | ===== Remarks ===== | ||
| + | Inputs, if activated, should remain activated, to keep motor/coil in the chosen position. | ||
| + | |||
| + | GCA50 should be programmed as switch, with C2 NOT checked. | ||
| + | |||
| + | Checking C2 will inverse action. | ||
| + | |||
| + | ===== Bill of materials ===== | ||
| + | ^ Qty ^ Reference ^ Description ^ | ||
| + | | 8 | R1..8 | 1 kOhm | | ||
| + | | 2 | R9,10 | 3.3 kOhm | | ||
| + | | 3 | R11...13 | 10 kOhm | | ||
| + | | 1 | RP1 | 8x 10 kOhm SIL-9 | | ||
| + | | 1 | C1 | 1000 uF 35V radial | | ||
| + | | 1 | C2 | 10 uF 35V radial | | ||
| + | | 3 | C3..5 | capacitor 100 nF | | ||
| + | | 1 | VR1 | Power IC 7805 (TO-220) | | ||
| + | | 1 | U1 | Processor PIC16F627 or equiv. | | ||
| + | | 1 | | socket 18Pins for U1 | | ||
| + | | 2 | U2,U3 | PCF8574 | | ||
| + | | 4 | U4..7 | L293D (DIL-16) | | ||
| + | | 2 | U8,9 | LTV847 or equiv. | | ||
| + | | 8 | | Socket Dil16 | | ||
| + | | 1 | GR1 | Bridge B80C1500 round | | ||
| + | | 1 | F1 | PFRA110 mulitfuse 1.1A | | ||
| + | | 4 | J1 | AKL012-04 | | ||
| + | | 1 | J2 | AKL012-02 | | ||
| + | | 1 | SW1 | dip-switch 3 | | ||
| + | |||
| + | |||
| + | |||
gca125-proto-en.txt ยท Last modified: 2018/11/12 08:56 (external edit)
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