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Rt x Pulse 8 HP Operating Instructions Manual

Model railroad dcc accessory decoder
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OPERATING MANUAL
Model Railroad DCC accessory decoder.
This board is a DCC accessory decoder. What can be controlled with it is dependent on the firmware used.
This document describes the operation of the board. Either the DIY version as pictured or the complete SMT
version as purchased.
1 of 13
0.1

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Summary of Contents for Rt x Pulse 8 HP

  • Page 1 OPERATING MANUAL Model Railroad DCC accessory decoder. This board is a DCC accessory decoder. What can be controlled with it is dependent on the firmware used. This document describes the operation of the board. Either the DIY version as pictured or the complete SMT version as purchased.
  • Page 2 OPERATING MANUAL In use. If you have purchased a complete/tested RT_Pulse_8_HP_SMT continue on the next page. Using this firmware on github: https://github.com/Rosscoetrain/DCC-Turnout-Decoder-Direct The board will control dual solenoid turnouts such as the Marklin M track 5117, 5202, 5120, 5214, 5207 or 5128.
  • Page 3 OPERATING MANUAL 3 of 13...
  • Page 4 OPERATING MANUAL Connection to the layout. How you connect to your layout is really dependent on your setup. This is a how to connect to a DCC-EX command station with separate power supply for the CDU. The DCC track is connected to the DCC Input connector on the decoder. The power supply can be 12 - 24V DC or 12 - 20V AC and is connected to the PWR IN connector on the decoder.
  • Page 5 OPERATING MANUAL Connecting Turnouts The turnouts are connected as in the diagram below. The wiring to the PCB is connected thus: + = Common C = Close T = Throw The connectors are screw terminals which will accept wire between 20awg and 26awg. If your turnouts don’t change in the right direction for close and throw simply reverse the Close and Throw wire connections.

  • Page 6: Serial Commands

    OPERATING MANUAL Serial Commands Several commands are available via the Arduino serial monitor for configuring or displaying information on the decoder. <?> Show available commands <> Show current Control Variables <A address> Change decoder base linear address <P number> Set solenoid pulse duration in micro seconds = number * 10 Normal setting for this is 20 - 30 (default 25 = 250uS) <R number>...

  • Page 7: Learning Mode

    OPERATING MANUAL Learning Mode. To set the address on the decoder in learning mode. Connect the decoder to your DCC track via the DCC input connector. It’s best not to have any solenoid devices connected at this point. Put a jumper on the Learn header next to the Arduino nano. The LED on the nano will flash three times to show it is in learning mode.
  • Page 8 OPERATING MANUAL Programming Track Setup. The CV’s can be set with the decoder connected to a programming track. Connect the decoder DCC IN to the programming track of your command station. How you send a write command to the decoder CV will depend on your command station. Eg Using a DCC-EX command station connected to an Arduino IDE serial monitor send the following command to change the address: <W 1 address>...
  • Page 9 OPERATING MANUAL Address Table (CV9 = 0) Base Base Base Base Address Address Address Address 9 of 13...
  • Page 10 OPERATING MANUAL Base Base Base Base Address Address Address Address 10 of 13...
  • Page 11 OPERATING MANUAL Base Base Base Base Address Address Address Address 1001 1005 1009 1013 1017 For addresses above 1017 set CV9 = 1 and CV1 = 0 to 255 and add 1024 to the base address above. Eg. for base address 1021 - CV9 = 1 and CV1 = 0, for base address 1024 CV9 = 1 and CV1 = 1 For CV9 = 0, the base address can be calculated by the following: base address = (CV1 - 1) * 4 + 1 The CV1 value can be calculated by the following:...
  • Page 12 OPERATING MANUAL Addendum 12 of 13...
  • Page 13 OPERATING MANUAL References. DIY version PCB on pcbway.com: https://www.pcbway.com/project/shareproject/ RT_DCC_Pulse_8_High_Power_Turnout_Decoder_with_capacitor_discharge_unit_ae884dd9.html Dual solenoid accessory decoder firmware: https://github.com/Rosscoetrain/DCC-Turnout-Decoder-Direct 13 of 13...