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Introduction
How DCC works The way many hobbyists control their trains today is by conventional DC operation. This is where a voltage is applied to the track from a transformer. The higher the knob on the transformer is set, the more voltage is applied to the track and the faster the trains run. While this simple and reliable method has been around as long as the hobby itself, things can get very complicated when more than one train is running on the same track. In order to allow for this, we must set up independent circuits called “blocks” so that each train can be under separate control. In Digital Command Control (DCC) the voltage that is applied to the track is constant although no train will run until it is told to do so. This is because every locomotive is equipped with a “brain” or more properly a decoder that interprets the commands given to it by the DCC system. The result is that many trains can run on the same track at the same time completely independent of one another. They can even run at different speeds and directions. Lights as well as other functions can be turned on and off independently on each locomotive regardless of whether the train is parked or in motion. Simply stated, DCC allows you to run your trains instead of your track. Depending on the system you choose, DCC can do more than just run your trains. Some manufacturers offer decoders that will run turnouts (switches), layout accessories and even interior train lighting. Imagine running a passenger train and being able to turn the lighting on and off in individual coaches! Some manufacturers even offer train detection and integrated signaling as additional options. All DCC systems are comprised of 3 main components: a command station, a power station (also called a booster) and a throttle. Let’s start with the throttle. This is the input device that allows you to communicate with the command station. The command station’s job is to create the digital signals that eventually will be sent to the decoders in the locomotives, however, before these signals can be delivered to the locomotives, they must be amplified through the power station or booster. In addition to amplifying these signals, it is also the job of the booster to provide the voltage and amperage that runs the layout. Before we go on any further, it is also necessary to discuss the decoders which ride along inside each locomotive. It is important to understand that these decoders play a large part in the operation of the system. Each decoder contains several memory banks called configuration variables (CV’s). The process of changing the information inside the CV’s is known as programming. The programming of CV’s is what gives each decoder (and locomotive) it’s identity and “personality”. For instance, CV # 1 is the address. The address is a number that is given to that decoder which allows the system to recognize it. Each locomotive running on the layout should have a different address. The address is what allows each locomotive to be run independently as all other locomotives will ignore commands that are not specifically sent to it’s address. This basic concept is what makes DCC the powerful tool it is. Other programming options in DCC include acceleration/braking that can simulate the drag of a loaded train, and maximum speed limiting. The latter is especially handy for us N-Scalers since most of our locomotives tend to run too fast anyway. The
concept of DCC was invented by Mr. Bernt Lenz in Germany in the early
1980’s. Mr. Lenz, a
physicist by trade, designed and built systems for the two “giants”
of the European model train industry: ARNOLD (who invented N-Scale) and
MÄRKLIN. The DIGITAL PLUS
by LENZ system that is sold today is an extremely enhanced and updated
version of those original systems.
THE N-SCALE DIVISION is a fully authorized DIGITAL PLUS by
LENZ dealer. In addition to
DIGITAL PLUS by LENZ, we are also maintain fully authorized dealerships
for the firms of DIGITRAX and MRC who also offer high quality products
for DCC. This brings us to
the next segment of our primer, the systems themselves. Digital Command Control System Descriptions In this next section we will highlight the major features of each manufacturer's DCC system and components. The manufacturers are arranged by alphabetical order. DIGITAL PLUS by LENZ As stated in the opening, LENZ is the inventor of DCC. Therefore, it should be no surprise that we personally regard DIGITAL PLUS by LENZ as the absolute top-of-the-line in DCC. The LENZ factory is located in Geissen, Germany and is imported into the United States exclusively by LENZ Agency of North America. DIGITAL PLUS by LENZ offers three systems: the SET 90, the SET 100 and the LENZ COMPACT. All of the LENZ systems as well as their decoders have earned the prestigious NMRA DCC Conformance Award meaning they have undergone strict compliance testing for compatibility to the DCC standards as set up by the NMRA in the USA.
LENZ offers two systems,
the first is the SET 90. This is a two
piece system which consists of the LH 90 Throttle and LVZ 100
combination Command and Power
Station (booster). The LH 90 Throttle features a large knob which
is specially designed to have the look and feel of those on a
traditional DC transformer. The SET 90 will address 9,999
locomotives including those with extended addresses. The SET 90 offers
full walk-around capability since the throttle can be unplugged at any
time without interrupting the current state of the layout. The
price of the SET 90 is $239.00. The SET 90 is quite expandable as
it supports up to 31 throttles.
Finally,
the top of the line DIGITAL PLUS by LENZ system is the SET 100.
Like the SET 90, the
SET 100 is a two piece system which utilizes the new, more powerful LZV
100
For WIRELESS DCC, DIGITAL PLUS by LENZ has introduced the XPA. This slick device turns any common cordless telephone into a full function wireless remote throttle! It works with all of the LENZ DCC systems and is priced at only $49.45!
In addition to their systems DIGITAL PLUS by LENZ also offers some of the most innovative decoders on the market. They were the first to offer Back EMF (BEMF) which is where the decoder monitors the motor output and continually adjusts the input to keep the motor at constant speed. The result is "cruise control" for your locomotives which keep a constant speed even on grades without having to adjust the speed manually! DIGITAL PLUS by LENZ also offers decoders with Silent Drive technology which results in the motor running virtually dead silent and the only noise you will hear from your locomotive is wheels on rail just like the real thing! DIGITAL PLUS by LENZ currently offers the world's smallest decoder, the LE0511W which is about the size of a dime! DIGITRAX The Georgia based company of DIGITRAX offers 3 basic levels of DCC systems and many types of decoders and accessories. Note that DIGITRAX systems do not come with decoders allowing you to select the appropriate decoders for your particular locomotives.
The DIGITRAX entry-level system is the ZEPHYR. At a price of $159.99, the ZEPHYR is an all in one system that combines a Command Station, Booster, and Throttle all in one unit. It even come with it's own Power Supply which is something most DCC do not include. The ZEPHYR may be an entry level system but it does have some very innovative design features such as the inclusion of two "jump ports" which allow you to hook up standard DC transformers and use them as digital throttles! This is an excellent idea since most model railroaders moving up to DCC have a least one standard DC transformer on hand anyway. Now it can be put to good use instead of tossed aside. This is a very nice value priced entry level system which is capable of running 10 trains.
The mid-level system by DIGITRAX is the SUPER EMPIRE BUILDER. It offers many advanced features at very reasonable cost. With a street price of $279.99, the SUPER EMPIRE BUILDER includes the DB 150 Command Station/Booster, the DT 400 Super Throttle, UP 5 Universal Connection Panel and LT 1 LocoNet tester. The DT 400 Super Throttle is the top of the throttle DIGITRAX offers. It features a multi line LCD display with user friendly text messages to guide you. The SUPER EMPIRE BUILDER is also available in a RADIO EQUIPPED wireless version for $439.99. The SUPER EMPIRE BUILDER is capable of handling 127 locomotives (126 DCC & 1 analog). The SUPER EMPIRE BUILDER system also offers 128 speed step capabilities.
The top-of-the-line system by DIGITRAX is the SUPER CHIEF. With a street price of $359.99, the SUPER CHIEF includes the DCS 100 Command Station/Smart Booster, the DT 400 Super Throttle, UP 5 Universal Connection Panel and LT 1 LocoNet tester. The SUPER CHIEF is full of features like the ability to address up to 999 locomotives, support for advanced consisting, “on the fly” programming so that most decoder functions can be adjusted right on the mainline with out the need to go to a separate programming track and 128 speed step operation. This system is an good choice for a large layouts or model railroad club as many throttles can be added to allow for multiple operators. For wireless operation there is a RADIO EQUIPPED version of the SUPER CHIEF which sells for $511.99.
In addition to systems, DIGITRAX also offers a superb line of decoders. Most of their decoders are more than just basic and allow for several additional functions such as horns or smoke generators. Many of their decoders also have special lighting effects built-in. The special lighting effects include such things as alternating ditch lights and strobes! The modeler has to supply and wire the bulbs but this task is made simple thanks to the extremely well written decoder users manual provided by DIGITRAX. Another area in decoder technology where DIGITRAX has excelled is in the manufacture of “Plug-N-Play” decoders. These are decoders that are designed to replace the existing circuit boards in specific locomotives. This makes decoder installation much easier as soldering is no longer required in most cases! Finally, DIGITRAX also produces an excellent line of accessory decoders (for lighting and turnouts, etc.) and a unique accessory programmer. The PR-1 programmer makes programming easier for those who wish to use their personal computers. With the PR-1, the most complex of decoder programming is reduced to a few simple mouse clicks. We again would like to emphasize that you do not need to have a computer or knowledge of computers to get involved with DCC, this accessory just makes things go a little faster for those who do. Model Rectifier Corporation (MRC) New Jersey based Model Rectifier Corporation (MRC) offers a couple of excellent DCC systems that are considered by many to be the value leaders. These systems do not come with decoders allowing you to select the best ones for your needs.
MRC's entry level system is the Prodigy Express and it offers the features of high end DCC at an entry level street price of only $134.98. The hand held throttle features a full numeric keypad plus a smooth encoder for speed control. These are both features that up until now were unheard of at this price point! Other comprehensive features include two or four digit addressing (0-9999 addresses available) 14-28/128 speed step capability, advanced consisting, the ability to control 16 accessory functions and full programming capability including programming on the main. The system comes complete with it's own power supply capable of putting out 1.6 amps of power and can run up to 20 throttles. MRC's Prodigy Express system is an excellent choice for a small layout.
The Prodigy Advance Squared is MRC's high end DCC system. Naturally it incorporates all the features of the Prodigy Express above plus more. Perhaps the most important difference is that the power output is increased to 3.5 amps allowing you to run more trains at the same time. Up to 28 accessory functions can be controlled. The system can handle up to 99 throttles at the same time and has a built in fast clock for operating sessions. There's also built in routing control which allows you to throw multiple turnouts with just one button. MRC's Prodigy Advance system is an excellent choice for any size layout!
The ultimate DCC system from MRC is the Prodigy Advance Wireless. It will do everything the Prodigy Advance Squared will do and as its name suggests, it employs a wireless throttle. The system features full duplex communication which means every function that a traditional wired throttle will do can be done with the Prodigy Advance Wireless. There is no need to plug the throttle in to select a new locomotive and even the most complex programming can be done wirelessly. The system comes with rechargeable batteries that can be charged directly in the throttle. It can also use conventional batteries and can also operate as a traditional wired throttle as well! Decoder Installation and Other Useful Information Many folks fear that
decoder installation can be a nightmare.
This does not have to be true.
In N-scale, many locomotives are coming from the factory with
either a decoder already installed or the ability to install one without
soldering thanks to the new “Plug-N-Play” decoders from
both DIGITAL PLUS by LENZ and DIGITRAX. For older locomotives
without the
Besides basic train control there have been promises of other unique items for the DCC market. One of these items has already appeared and it deserves special mention. In 1996 DIGITAL PLUS by LENZ and ROCO teamed up to produce a DIGITAL RAILWAY CRANE. This crane is actually a U.S. prototype that was also used on European railways. A perfect subject to model! The crane hook and boom can be raised and lowered as well as full 360 degree rotation of the crane itself all under digital control. There are even accessories (available at extra cost) such as an electro-magnet, a clamshell bucket and a spotlight which can be activated via DCC. This model won the coveted MODEL OF THE YEAR AWARD at the Nürnberg Toy Fair in 1996! The ROCO/LENZ DIGITAL CRANE is HO but an N-scale model is expected in the future. Choosing a System that Fits Your Needs The most important considerations when choosing a DCC system are the size of your layout and budget. While the DIGITRAX SUPER CHIEF and the DIGITAL PLUS BY LENZ SET 01 offer many advanced features, not everyone will be able to budget advanced systems like these. Also on the topic of expense, we would like to present an interesting option that can be easily overlooked. It is not necessary to convert your entire layout or locomotive fleet all at once. Exercising this option can save a lot of money in initial startup costs. For example, if you have a modest size layout that has a yard, you should consider running the yard under DCC control and let the main line stay under conventional DC power until your budget allows for the conversion more locomotives. The excellent speed control that DCC offers will make yard operations more enjoyable and you can still run trains on the main line as you have always done. It is important to understand that locomotives with decoders installed will still run under conventional DC control! Once you have decided on a system, we recommend that you purchase that system from a reputable dealer who will support your needs for years to come. We at THE N-SCALE DIVISION have already made that commitment to our customers. Help is just a phone call away. After all, you are jumping in to a whole new world. You should want someone there that you can turn to for reliable advice and answers. If on rare occasions we can not give you answers immediately, we can turn to the manufacturers for further support. This is our advantage by being authorized by these firms to handle their products. Conclusion We hope that this primer has been helpful to you but there still may be questions that you need answered. We invite you to contact us for a personal consultation on your switch to Digital Command Control. THE N-SCALE DIVISION wants to be your source for DCC. Oh, and don’t forget we can still provide you with the best in trains and accessories from American as well as European and Japanese manufacturers at discount pricing just as we have been doing for many years. We know that making the switch to DCC will allow you to have more enjoyment from your hobby. Contact us today, we look forward to hearing from you! CLICK HERE TO GO SHOPPING FOR DCC PRODUCTS
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Digital Command Control
(DCC) is one of the latest innovations in the hobby, however, there is
still much confusion about what it is and how it works.
