Product Support for: Throttles -> Utility Throttle with 4 Digit Addressing and Infrared Capability (UT4)

If you are NOT plugged into a LocoNet port1. Use the 4 rotary address selector knobs on your UT4 to dial up the 2 or 4 digit address of the locomotive you want to run.  To enter a 2-digit addresses, set the first two selector knobs to 0 and enter the two digit address on the 2 address selector knobs on the right hand side of the throttle (for example 0025).2. Plug the UT4 into any LocoNet port and automatic selection occurs.3. A Green Status light confirms that selection has been done successfully - You’re off and running!4. A Red Status light means the loco is ...

Can the UT4 or UT4R be set to have its own unique throttle ID like the DT300/DT300R and DT400/DT400R? There are several uses for this functionality, including it being useful when looking at logs of LocoNet traffic from PanelPro/DecoderPro when trying to diagnose problems and identify potentially faulty throttles. This from A. J.: Each UT4 has a unique ID programmed as serialization at manufacture, and is distinguishable from DT400's etc. The UT4 has values of EX1 as {x74/x75} in the LocoNet messages with EX2 equal to the unit factory serial number.

UT4 Sleep Mode is used to extend throttle battery life; it does not charge the throttle batteries but it does reduce the draw on the throttles' batteries.To put the UT4 to sleep, press and hold any function key down and turn any address selector to the next digit. The throttle will go into sleep mode. The UT4 will release the address that was selected and the status light will briefly turn red. If the unit is plugged into LocoNet port you can unplug the throttle and the throttle will then be in sleep mode until plugged back in to LocoNet ...

The UT4 series, UT4, UT4D & UT4R are "traditional" style throttles.  The UT4s were developed from a specification submitted by Digitras users through the Digitrax Yahoo group. These throttles were designed by operators for operators.  They are also great for beginners because of their intuitive controls and reduced feature set. By not offering all the bells and whistles, beginners can run your railroad without accidentally changing settings that might cause problems.   Works with any LocoNet compatible system   4-Digit addressing   Functions F0 - F12 for lighting and sound decoder operation   Direction switch with center brake position   ...

The UT4 comes InfraReady for layouts that are equipped with one or more UR90 infrared receivers. For Infrared operation:1. Install one or more UR90 infrared receivers on your layout.  These should be connected to LocoNet and powered.  If you have UR92s and/or UR91s present on the layout, these also support infrared operation.  You will need enough infrared receivers installed on the layout so that the throttles you use can "see" the receivers since the transmission is line of sight.  You may also encounter problems in rooms where there are large windows that would interfere with the transmission.2. Install a 9 ...

UT4 Function Control Keys and How they WorkThere are 8 physical keys used to control functions F0-F12 on the UT4 throttle. F1 through F6 and F7-F12 share the same keys.  You will see F1-F6 in black print and F7-F12 in blue print to remind you that you will need to use the SHIFT key to access F7-F12. To use functions F7-F12 you must press and hold down the SHIFT key on the lower left row of the throttle as you press the F7 through F12 keys to activate any functions available on those functions. All the UT4 functions work like other Digitrax throttles. ...

Dispatching is the process of releasing a loco so that another user can take control of it. To release, or dispatch, a loco under current UT4 control:1. Unplug the UT4 from the LocoNet port.2. Press and hold the DISP (Dispatch) key.3. Plug the throttle back into a LocoNet port.

Stealing, or "sharing" is defined as acquiring control of a loco address that is being used by someone else on another throttle. To ‘Steal’ a loco:1. Unplug the UT4 from the LocoNet port.2. Dial up the address of the loco you want to steal.3. Press and hold the ‘STEAL’ key while plugging the throttle into the LocoNet jack. Note: To steal or dispatch another loco, you must unplug the UT4 and repeat the above sequence.

Consisting is the action of linking more than one locomotive or power unit together to be controlled by a single locomotive address.  The UT4 is not capable of building or breaking up a consist.  This is handled by a throttle or computer program that is able to build and break up consists and then hand the consist off to the utility throttle operator.  Utility throttles are designed to be simple to use for operators on the railroad.  The UT4 CAN control a consist by selecting the address of the TOP loco in the consist.  It can also control the functions of locomotives within a consist.If ...

  As of 2017, UT4 throttles can only be converted to duplex.  Digitrax discontinued simplex radio upgrades due to lack of parts. This radio retrofit must be done at the Digitrax factory because of FCC rules. Please complete the form in the warranty section of the website and send it in with your throttle.  Be aware the long cord will be cut off to 12", no exceptions.

Changing the Direction switch on the top left hand side of the UT4 from Forward (F) to the center Brake (B) position causes the loco to stop at the locomotive’s programmed deceleration rate. Changing quickly from ‘F’ to ‘R’ (Reverse) causes the loco to stop at the programmed deceleration rate, then reverse direction and accelerate at the locomotive’s programmed acceleration rate.

My club uses UT4R radio throttles. At the end of the session they ask that the battery be reversed in the throttle housing to "extend battery life". This effectively reverses the polarity of the battery in the throttle. Is this step necessary? Is there any drain on the battery when the throttle is not in use? If there is a drain, should the battery then be removed for storage? So my question is: How should you store a UT4R so as not to drain the battery when the throttle is not being used? The throttle batteries will indeed drain if ...

  Digitrax UT4 Throttle Operating Instructions by Dan Bourque     Selecting a locomotive or consist 1.         Dial the 4-digit locomotive address into the “LOCO ADDRESS” dials             - For a consist, the address will normally be the lead locomotive             - For a 3-digit locomotive number, use “0” for the first digit 2.         Plug the throttle into any receptacle on the layout fascia (e.g. Digitrax UP5) 3.         Press the “SEL” key, the ST light on the throttle should turn green 4.         Move the direction selector on the throttle to either “R” or “F” 5.         Move the ...

Digitrax's “safety selection” is an important operational safety feature. Digitrax chose not to allow one way address selection to prevent multiple operators from being able to select and send commands to the same addresses at the same time. Having multiple operators sending commands to the same address can result in serious problems in an operating session because locos can appear to be out of control. Simplex radio throttles like the DT402/R, DT400/R, DT300/R, UT4/R and similar throttles operate as one-way (simplex) infrared or radio transmitters. The DT402, DT400/R, DT300/R, UT4/R must be plugged into LocoNet to select an available locomotive address to run on ...

Adding duplex radio, infrared or simplex radio to your existing Digitrax system is simple because of LocoNet.InfraRedYou probably already own a DT300, DT400, UT4 or DT402 series throttle. All of these are "InfraReady." These all come with two IR emitters pre-installed. All you have to add for IR operation is one or more UR90 Infrared Receivers to your layout. Most layouts require multiple UR90s because the infrared signal is line of sight. This means that your receiver will need a sight path to the throttles.Simplex RadioDigitrax throttles with an "R" at the end of the part number are simplex radio ...

Can I add Radio and IR to my Big Boy?Yes.Adding radio and/or IR to Big Boy is the same as adding it to any other existing Digitrax layout or Digitrax Starter Set. Digitrax offers InfraRed, Duplex Radio and Simplex Radio systems for wireless operation. Any combination of these wireless methods can be used on the same layout at the same time.Infra Red Wireless OperationAll current Digitrax throttles are Infrared capable (InfraReady) in that they come from the factory equipped with the IR emitters required to send IR information to LocoNet. To use this functionality, you only need to add one ...

Q:  I have an MRC RailPower 1370 DC power pack.  I was wondering if that would work as a jump throttle on my Zephyr till I get my UT4 LocoNet Throttle? A:  We think that the answer is "No", but you will need to verify whether this power pack produces pure or pulsed DC power directly with MRC. Throttles used with Zephyr Xtra via the Jump Port must produce pure DC power, often referred to as "smooth" power packs. Many "advanced" analog power packs use automatic pulse injection to make model locomotives run better at slow speeds. This uses 1/2 wave AC ...

How to read back and change BDL168 Option Switches (OpSw): 1. Power up your BDL168 and connect it to LocoNet. 2. Connect a DT series or UT1, UT2 Digitrax throttle to one of the the BDL168's LocoNet connectors. NOTE: The UT4 will not work as its design is different for the original UT series throttles.3. Press the switch behind the red option LED for about 1 second, then release it. The red option and green ID LEDs will flash alternately to let you know that you are in option switch setup mode. 4. Go into SWITCH mode on your throttle. ...

Q:  I just purchased a used Digitrax set consisting of a DB150, UT2 and a PS515 for a very low price. What do I need to add to bring this up to current standards? A:  Because of Digitrax LocoNet, it is easy to add the latest components to upgrade on older starter set.  What you purchased was originally called a Genesis Starter Set.  The PS515 did not come with it but it is the perfect power supply for the DB150.   Your next step depends on what you want to do with your railroad.  In this case, the components you have will be ...

I am putting the finishing touches on my 10 x 20 foot H0 railroad. It is a copy of the Cajon Pass, Salt Lake & Santa Fe RR by John Armstrong (#86 in the 101 Track Plans by Linn Westcott) [Kalmbach Publishing, ISBN 0-89024-512-6; still in print]. I have decided to go with DCC and my local hobby store recommended Digitrax. The layout is in my basement, I will be the only operator, the plan has 54 track switches (34 NJ International twin coils and 20 Tortoise turnout motors). Can you give me an idea as to what equipment I ...

The following chart indicates: Which Digitrax throttle (DT400, DT400R, DT402, DT402R, DT402D, DT500, DT500D, DT602, DT602D, UT4, UT4R, UT4D, UT6 & UT6D) Works with which LocoNet interface throttle panel (Universal Panel-UP3/UP5/UP7, UR90, UR91, UR92, and UR93) Under which types of communication (Tethered, IR Mode, Simplex Radio, or Duplex Radio). Throttle Interface Chart Throttle UP Panel Tethered UR90 Tethered UR90 IR Mode UR91 Tethered UR91 IR Mode UR91 Simplex Radio UR92 Tethered UR92 IR Mode UR92 Duplex Radio UR93 Duplex Radio DT400 Yes Yes Yes Yes Yes No Yes Yes No No DT400R Yes Yes Yes Yes Yes Yes Yes Yes ...

The ability of a variety Digitrax throttles to work together on layout equipped with a variety of wireless technologies is part of the beauty of LocoNet.  With LocoNet, it is simple to add components to the system and have all of them work together. Digitrax infrared throttles will operate on any layout equipped with UR90 infrared receivers, UR91 simplex receivers and/or UR92 duplex transceivers.  All of these panels are equipped with infrared receivers.  All current model Digitrax throttles have infrared emitters that will work wirelessly with any panel that has an infrared receiver.  All current Digitrax throttles can also be used ...

  Can I add Radio and IR to my Zephyr Xtra?Yes.Adding radio and/or IR to Zephyr and Zephyr Xtra is the same as adding it to any other existing Digitrax layout or Digitrax Starter Set. Digitrax offers InfraRed, Duplex Radio and Simplex Radio systems for wireless operation.  Any combination of these wireless methods can be used on the same layout at the same time.Infra Red Wireless OperationAll current Digitrax throttles are Infrared capable (InfraReady) in that they come from the factory equipped with the IR emitters required to send IR information to LocoNet.  To use this functionality, you only need to ...

  My layout is in N scale, with an 85 foot double track main, a 12 track storage area, small yard, and engine facility. The layout measures 10 X 14 with two helices. There are a total of 34 engines, many of which are with their trains in the storage area. All of the already made-up trains (11) have two or three engines on them, ready to be brought up via a helix to run on the railroad. Currently, the road is divided into six parallel blocks (DC); 12 blocks in all. In the future, I plan on adding a ...

The Kelana Jaya Rail Line model is a DCC intense layout, using many Digitrax command control components to achieve the goal of training operators of the actual rail line. The railroad was built in the 1990's and many of the Digitrax devices used for the Kelana Jaya Rail Line model have been superseded with improved units. Components used for the Kelana Jaya layout: 28 Mainline turnouts 11 Yard turnouts 39 Tortoise switch machines 84 Dwarf signals (yellow/green, red/green, red/yellow) 38 Mainline block signals 38 Heavy duty SPDT switch relays Digitrax Components Used for the Kelana Jaya layout: 1 DCS 100 ...

At first glance, the typical switching railroad would not seem to be a good candidate for DCC operations. Yes, there may be only one locomotive on many of these railroads, but that locomotive can still benefit from DCC. By adjusting the starting, mid-range and maximum speed values of this locomotive, you get very good slow speed control, perfect for the switching railroad. And, of course, if you add a second locomotive, then DCC becomes the clear choice because you are not longer having to throw toggle switches just to move around the yard. The DCC environment also gives you turnout ...

I have a 4x8 H0 scale layout.  I'm 13 years old and REALLY thinking about switching to DCC, I need to know really fast because I want to ask my parents to get it for Christmas.You wouldn't know by looking at those who edit the Tech Support Depot, but there actually was a time when we too were thirteen, and just starting out in model railroading.  In many ways, we still are thirteen years old; we just can't move as fast.  Consider this photograph from our youth: This little bit of ancient model railroad history dates back to the 1950's, ...

  I have an "M" shaped 250 square foot layout with 500 feet of track and twelve locomotives. What Digitrax equipment would I need? You don't say what scale this railroad will be modeled in, which is important since the locomotives in smaller scales draw less current than larger decoders. However, for purposes of estimation: Twelve Locomotives. Each locomotive is going to draw, at the very least, 5 MA for the decoder. If it has LED lights, then it will typically draw 15 MA more; conventional light bulbs will draw 50 MA. A typical H0 locomotive will draw 600 MA ...

Digitrax Complete Train Control By Zana & A.J. Ireland Digitrax Complete Train Control makes reliable, realistic train operation and simplified layout wiring a reality. Digital Command Control is incorporated within the Digitrax system to let you control multiple trains independently on the same section of track without blocking. In the real world, engineers control the speed and direction of real trains. Engines operate under their own power independent of the track. Each engine has its own motion characteristics like how fast it speeds up (acceleration) and how long it takes to slow down (deceleration). A locomotive's performance is influenced by ...

This article stops in a strange place??  We need to find the rest of it and split it up into meaningful chunks.  Also needs meta stuff Troubleshooting in General:Regardless of the guides, manuals, tips, suggestions, experts or whatever, troubleshooting can occasionally degenerate into a vast chasm of darkness and confusion.  It would be impossible to cover all the areas that have, can or may cause problems. This is a general guide to identifying and resolving problems with Digitrax Complete Train Control.  Keep Good Records:Although it may seem to be a pain while setting up your Digitrax system, keeping layout records ...