Dcc interface

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Dcc interface

These plugs and sockets make it much simpler to install a decoder into a suitably equipped locomotive. In most cases, a blanking plug must be removed before installing the decoder. If a locomotive is not DCC-ready then it will lack an interface and must use a Hardwired Decoder or a drop in replacement DCC control board if available for that specific model.

These interfaces are designed for basic installations without sound or many additional functions. The various sizes are intended to cope with the various physical size and power requirements for different scales. The 6 pin small interface is intended for N gauge locomotives due to their restrictive size and lower power requirements.

The locomotive side is a 1x6 female socket with 0. It is also called a NEM plug. The locomotive side is a 2x4 female socket with 0. Also known as the NEM plug. The 4 pin large interface NEM is intended for O gauge and above and allows for higher power. The locomotive side is 4 male pins, the decoder side is 4 female sockets.

dcc interface

The standards do not define the physical connector layout. This interface is always a direct-connect type where there is no wiring harness.

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The decoder plugs directly on to the pin header mounted on the locomotive chassis. The NMRA standard has discouraged the use of this connector in new locomotive designs from January It is intended to be replaced by the PluX interface. The 21MTC features a socket female which mates with pins on the locomotive interface. The PluX is the opposite: the pins are on the decoder, which mate with a female connector on the locomotive.

The PluX standard defines the length of the pins, as they pass through the locomotive interface board for a lower profile installation. If a manufacturer states the locomotive comes with a 21 pin decoder, it would indicate a 21MTC interface. In addition to specifying the electrical interface and connectors, the NEM standard also mandates the maximum physical size of decoders. A fully compliant Next18 decoder is no larger than 15mm x 9. There are two variants: Next18 and Next18S.

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Next18 supports motor control, front and rear headlights, and 6 auxiliary output functions; two of those function pins may instead be used to provide an on-board TrainBus serial interface. A Next18S decoder adds sound by sacrificing two auxiliary function outputs for the speaker connections. The interface specifies an extremely small pin "encapsulated" connector.

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The entire connector is only 8mm long and 5mm wide. Because of their small size, connector pins are only rated for milliamps, so some connections are allocated two pins. The result being that although there are 18 pins, some are redundant, and the 18 pins provide only 12 discrete connections. A feature of the interface is "smokeless symmetry". Pins are assigned in a somewhat symmetric fashion, such that if installed backward, no harm is done to either the locomotive or the decoder; it will not function properly, but nothing will be "smoked".

The pinouts are symmetrical, so the decoder can be plugged in either way.The interface acts as a bridge between a computer and the Digital Command Control system. The computer cannot connect directly to the DCC system as the signals needed and their format may not match. Older systems may use an RS serial connection between the command station and a computer running appropriate software, but this method is not common today.

DCC Interfaces for operating signals.

Some current command stations may include a USB or Ethernet port for direct connection to a computer. There are three strategies used to allow a computer interface to interact with its DCC system:. A programmer-type interface allows a computer to directly generate and receive DCC packets for the purpose of programming the CVs of a mobile decoder or stationary decoder. The programmer is attached to a programming track with limited current capabilities so that a newly-installed decoder can be tested without risk of damage.

Some programmers have a built-in mini booster to allow you to test a DCC locomotive on a small test track or rolling road. Some even have boosters large enough to power a small layout. In this scenario you don't need any other DCC equipment other than the programmer acting as your booster and the computer acting as the command station and throttles.

Some programmers are available specifically designed to download sound files from a computer to a sound decoder. They are usually specific to one brand of sound decoder, with specific software.

A booster-type interface is a computer interface with a built-in booster or one that connects directly to a DCC booster.

dcc interface

The computer acts as the command station generating the DCC Packets to be sent by the booster and either uses on-screen throttles or allows mobile devices with WiFi Throttle apps to act as the throttles. A throttle network interface acts as a bridge between a computer or networked computers and a DCC system's throttle network.

Throttle network computer interfaces are specific to different DCC systems. See the first table below. A few serial port interfaces are still available but are rapidly being displaced by USB-based versions. If you have a serial interface on the device that connects to the throttle network, but no serial port on your computer, a USB to Serial converter can be used.

There are a number on the market, remember that the cheaper ones may not work well or at all. Ethernet interfaces allow significantly more functionality than USB because any device on the same network can now access the DCC system and no dedicated computer is required. This opens up the possibility of WiFi Throttles on mobile devices which are starting to appear now.

Not all DCC systems require a separate computer interface, some brands may have one built into the command station. Examples are listed in the second table below. Wireless interfaces have appeared which allow the use of smartphones or other devices to connect to the throttle network. These are specific to your DCC system. A bridge between the computer and the throttle network is still required. Which DCC system is right for you? Jump to: navigationsearch.Requires USB cable, computer and railroad computer program.

We've been helping hobbyists realize their dreams for over years! From our early days as a general hardware store in Baltimore, Maryland, to now, as a leading name in the model train business. With thousands of products available in all scales from O to Z, we have everything you need to build, maintain, and expand your railroad empire. Share your layout and purchases with our community! Simply tag us in your photos on Instagram to see them appear here! Share with a friend:.

Quantity: 1 2 3. Why ModelTrainStuff. Top Rated We're known internationally for our knowledge, service and reliability. Curated by Experts We don't just sell trains; many of our staff members are railfans themselves!

Great Customer Service Our experts are always ready to assist with any questions you might have. Frequently Bought With. Instagram Feed Share your layout and purchases with our community! Need help with a product? Our friendly customer support people are eager to take your call!The PR4 makes decoder programming and interfacing your layout and computer easier than ever.

DCC Programming & Computer Control Interfaces

The PR4 seamlessly switches between computer interface and decoder programming modes automatically without having to press any buttons. Packaged in a smaller footprint the PR4 offers all the same great features as the PR3 it replaces. Many of the units we receive for repair do not need any repairs at all.

Before you send any units for repair, please take a few minutes to review our Support Options. Search for troubleshooting guides. Click here to send Digitrax Tech Support a message. Please give your name, e-mail address, phone number and when is the best time to contact you. Please give a complete description of the issue you are having.

Many problems are easily resolved by contacting Digitrax Tech Support without having to send in your unit. Un-repairable items will be returned to you at no charge with no repairs made.

If a defect or accidental damage occurs, return the unit directly to Digitrax for service. Please do not remove the shrink wrap protective sleeves from the Digitrax decoders. Shrink may be peeled back to expose pads for adding function wires. Accessory items that are not covered under the No Worries Warranty carry a 90 day warranty against defects in materials and workmanship. This includes speakers, wire, cables, battery covers, etc.

Intentional damage and customer modifications outside the scope of instructions provided with the product are not covered by this warranty. Do NOT send a locomotive with your decoder. If a locomotive is sent to Digitrax, Digitrax will ship the entire package back, unrepaired.

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dcc interface

Digitrax, Inc. That's it! A simple, straightforward warranty with no tricky language! Repairs are simple, too! Just fill out the form and return your items directly to Digitrax for repair.

We'll get them fixed up and return them to you as quickly as possible.Well, a…. Read More.

Interface Specifications

Hi Guys, this project has been coming in my mind for a very long time, but today it finally arrived — thanks to some help from John Plocher. The relays connect the Peco motors to a Capacitor Discharge Unit CDU and the sketch logic generates a short pulse to the relays so the Peco motor coils are only connected to….

The booms are controlled by small servo-motors. Occupation detection is done via a simple circuit using a small toroidal transformer to detect the DCC feed to the track, in a block extending either side of the crossing. The occupation detection circuit and the Arduino are powered directly from the track as well. The NmraDcc library has been updated to version 1. This will make the library much more portable to…. June 17, Alex Shepherd Projects. LocoLinx32U4 on Core-LocoBuffer Hi Guys, this project has been coming in my mind for a very long time, but today it finally arrived — thanks to some help from John Plocher.

Details of the project are shown below — enjoy! July 9, Alex Shepherd Projects. NmraDcc Library updated to version 1.The Display Data Channelor DDCis a collection of protocols for digital communication between a computer display and a graphics adapter that enable the display to communicate its supported display modes to the adapter and that enable the computer host to adjust monitor parameters, such as brightness and contrast.

The DDC suite of standards aims to provide a " plug and play " experience for computer displays. Extended display identification data EDID is a companion standard; it defines a compact binary file format describing the monitor's capabilities and supported graphics modes, stored in a read-only memory EEPROM chip programmed by the manufacturer of the monitor.

The format uses a description block containing bytes of data, with optional extension blocks to provide additional information. The first version of the DDC standard was adopted in August It included the EDID 1. In the most commonly documented scheme, the ID3 pin was unused and only the 3 remaining pins were defined. In this scheme, the input states of the ID pins would encode the monitor type as follows: [1] [2] [3].

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More elaborate schemes also existed that used all of the 4 ID pins while manipulating the HSync and VSync signals in order to extract 16 bits 4 ID pin values for each of the 4 combinations of HSync and VSync states of monitor identification. DDC changed the purpose of the ID pins to incorporate a serial link interface. However, during the transition, the change was not backwards-compatible and video cards using the old scheme could have problems if a DDC-capable monitor was connected.

DDC1 is a simple, low-speed, unidirectional serial link protocol. It specifies a means for a computer to send commands to the monitor, as well as receive sensor data from the monitor, over a bidirectional link.

Monitor Control Command Set version 2. The latest release of V2 standard is version 2.

dcc interface

Therefore, it must be set every time access to data above the first byte segment is performed. The auto-reset mechanism is to provide for backward compatibility to, for example, DDC2B hosts, otherwise they may be stuck at a segment other than 00h in some rare cases. E-DDC Version 1. Some KVM switches keyboard-video-mouse and video extenders handle DDC traffic incorrectly, making it necessary to disable monitor plug and play features in the operating system, and maybe even physically remove pin 12 serial data pin from the analog VGA cables [7] that connect such device to multiple PCs.

Microsoft Windows features a standard "Plug and Play Monitor" driver which uses the display's EDID information to construct a list of supported monitor modes. The Display Resolution control panel applet allows the user to disable this driver's Plug and Play features and manually select any resolution or refresh rate supported by the video card. INF file.This feature-rich, user-friendly system will…. Take a test drive… Here is the version 1.

DCC User Interface Specification

Give it a test drive on your computer. This feature-rich, user-friendly system will… Run dual throttles off your PC display. Each functions like a cab or walk-around allowing you to program, acquire, and run all locos and accessories E-mail decoder settings to friends around the world so they can download and match your settings just by adjusting the software Build a roster, display CVs, stacks, route manager, consist info, control accessories, all function buttons and more.

Decoder Profiles Here are decoder CV settings for a variety of decoders. Click here to download the folder to your computer. Then when you need to program a decoder you can use the CV Blaster to download the specific decoder CV settings you need.

We will try to update monthly to provide more decoder settings. If you have settings for a specific locomotive and want to share it, send an email to dougv modelrectifier. Then use the "save as" button. Name the file as manufacturer name, decoder model number and your initials only if you wish.

In the email message tell us the brand and model type that the loco that the decoder is installed in, and any other info you think a railroader would want to know.


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