Product Support for: Throttles -> Super Throttle With Infrared Capability (DT402 )

View the Product Page for the DT402

The DT402 super throttle can control of two locos at a time with all the powerful features and flexibility serious model railroaders demand. The DT402 is designed to handle nearly every aspect of layout control. You can run trains and consist, control up to 30 functions such as sound, program decoders, set up and operate routes, and much more. It is equipped with infrared wireless capability.

99 Articles Found for DT402

KB1043 Notes on IPL updating DT402 Throttles to R2

Notes on IPL updating DT402 Throttles to R2 DT402 throttles can be updated to R2 using any compatible PC connection, including the DCS240 and PR3.  Always make sure you are using the latest version of DigiIPL to update your hardware. When updating DT402D throttles the RF24 module must also be updated to the latest RF24 firmware. After updating the DT402s to R2 it is recommended that you reset the throttle to factory default. If you encounter any issue updating your DT402 throttle, the IPL update process can be repeated to resolve any issues.  Occasionally running the update twice or 3 ...

KB1044 DT402 R2 Release Notes

DT402 R2 Release Notes Access to Expanded Slots Updating the DT402 to R2 gives the throttle access to expanded slots in the DCS240 Advanced Command Station.  Access to these expanded slots are only available when IR and Radio(RF1) options are set to OFF in your throttle.  This means that throttles working in IR mode or Simplex Radio will not have access to the expanded slots.  Simplex Radio throttles(DT402R) will have access expanded slots if radio(RF1) is set to off and the throttle is plugged in.  It is recommended that throttles be factory reset after upgrading the firmware to R2.  By ...

KB1037 I’m getting a “StealZap” or message on my DT402 rev 2 throttle. What is this?

This is a feature that helps prevent having the same address selected on multiple throttles and creating unexpected operations.  When you steal you are truly stealing control of the locomotive instead of sharing it. When using a DT402 R2 throttle with an Advanced Command Station featuring expanded slots, each throttle ID is associated with the Loco Addresses it has selected.  With a when you select a Loco that is selected on another throttle the second throttle will take ownership of the Loco and it will be deselected from the first throttle. By first throttle will display “StealZap” meaning it has ...

KB1039 How do I practically use the 400 slots available in the DCS240? How do my throttles access the slots?

The DCS240 offers 400 locomotive slots and can support up to 400 throttles.  These slots can be broken down in to standard slots and expanded slots.  There are 120 standard slots in the DCS240, these slots are accessible using any Digitrax throttle.  There are an additional 280 expanded slots available to DT402 R2 (tethered and Duplex) and later throttles.  The DCS240 identifies the throttle type being used and assigns and adjusts the slots accordingly.  Expanded capability throttles are given the Expanded slots first, leaving the standard slots available for legacy throttles.  All this is done in the background and will ...

KB29 DT402 - Turn track power on and off

The Track Power indicator on your DT402 display shows the track power status. There is also a Track Status light on your Command Station. If the track power indicator is lit then track power is on. To turn the track power on or off: 1. Press the PWR key on the DT402. You will see a screen similar to the one below. You will now be able to toggle the track power on/off: 2. Press the N/- key to toggle the track power off. The Track Power Indicator on your DT402 and on your Command Station will go off. 3. ...

KB31 DT402 - Throttle Start up

1. Plug the DT402 series throttle into any functioning Digitrax LocoNet System or other LocoNet compatible system and you are ready to get started! You can use any LocoNet jack on your system. 2. After you plug the DT402 into your LocoNet, you will briefly see the DT402 splash screen: This screen shows the throttle type: DT402I, DT402R or DT402D and software version number. It is displayed for a few seconds each time you power on the DT402. 3. The DT402D will then momentarily display the Duplex Group name and radio Channel. 4. Next you will see the power indicator ...

KB32 DT402 - Battery Installation

For normal tethered operation, the DT402 series throttles do not need a battery. To use your DT402/R/D as an infrared or radio throttle, you must install a 9 volt battery. When you install the battery, the throttle will report the battery voltage then show the last display screen. We recommend that you remove the battery from throttle if it is unplugged from the system to conserve battery life. The battery can be stored inside the DT402/R/D by removing the battery and putting it back in the battery compartment with the polarity reversed. Be careful here, see the diagram below for ...

KB454 DT402 & DT400 Battery Installation

For normal tethered operation, DT402/DT400 throttles do not need a battery. If you want to use your DT402/DT400 as an infrared or radio throttle (R & D version), you must install a 9 volt battery.  You can use rechargeable batteries.DO NOT USE ANY OTHER TYPE OF BATTERY-AA BATTERIES DO NOT WORK. When you install the battery, the throttle will report the battery voltage and then display Idle. Once you plug in to LocoNet, the throttles will begin operating infrared and Ds and Rs will begin operating as duplex and simplex radio throttles. We recommend that you remove the battery from throttle if it is unplugged ...

KB1045 Updating and Using DT402R R2 and DT402 IR R2 throttles with your DCS240.

Updating and Using DT402R R2 and DT402 IR R2 throttles with your DCS240. Access to expanded slots in the DCS240 are only available to Tethered DT402 throttles with IR and Radio(RF1) throttle options set to off and DT402D throttles.  By default these options are set to OFF in the DT402 R2. DT402R throttles can access expanded slots in the DCS240 if IR and Radio(RF1) throttle options are set to off.  The DT402R will still operate in simplex radio mode with the DCS240 however it will only have access to standard slots. Practically, this means that you have two options for ...

KB754 DT402 & DT400 Series Throttles Y (+) & N (-) Keys

The DT402/DT400 Throttles include two multipurpose keys.The Y + and N - Keys are used: To turn track power on and off   To increase or decrease loco speed   To link and unlink locos during MU’ing   To accomplish tasks using system editors These two keys can be set up to act in two different ways:Repeating: so that if you hold a key down it will continue to increase or decrease step by step until you release the key. This option is active when your throttle is set up for ballistic tracking. Your DT402/DT402 throttles are shipped from the factory ...

KB448 Key & Knob Clicks - DT402 & DT400

  DT402 & DT400 can be set to click each time you press a key or turn one of the knobs. Some users prefer this auditory feed back and others don’t. DT402 & DT400 throttles are shipped with key & knob clicks enabled.

KB28 DT402 - Mode Indicator

The mode indicator, located at the bottom center of the LCD, shows the DT402’s current mode of operations. The DT402 automatically defaults to the Fn mode and returns to this mode whenever the EXIT Key is pressed. The Mode indicator usually shows what the numeric keys are associated with. For example, in Fn mode, any entry on the numeric keypad will affect functions. In Sw mode, keypad entries will change turnouts and in Lo mode, entries on the keypad will enter loco address numbers, etc. The following table provides a list of the Mode indication displayed, the mode name and ...

KB733 DT402 & DT400 Series Throttles - Emergency Stop - Local

DT402 & DT400 series throttles have two ways of doing an emergency stop. When you use Emergency Stop, the deceleration rate programmed into the decoder will not have an effect and the stop will be immediate.Local Stop Press the EMRG STOP Key to stop the loco that is active in the throttle display. To resume operation, use the throttle knob associated with that address to increase the loco’s speed.Press the EMRG STOP Key again to stop the loco that is associated with the other throttle on the DT400 or DT402 series throttle. To resume operation, each operator must use their throttle to set ...

KB24 DT402 & DT402R - Safety Selection of Locomotive Address

Selecting a locomotive-Safety Selection While unplugged, the DT402 (IR only) and DT402R (IR and Simplex Radio) operate as one-way transmitters. The DT402 and DT402R must be plugged into LocoNet to select an available locomotive address. After an address is selected, you can unplug from LocoNet and run the selected addresses with infrared or simplex radio. The throttle will automatically convert to infrared or simplex radio operation for all speed, direction, function, operations mode programming, and switch commands. The DT402D throttle has full duplex radio capabilities. Once the 402D has been configured to communicate with a UR92, the full functionality of ...

KB569 DT402 & DT402 Series Throttle Dispatching addresses or consists

Dispatching is a special feature incorporated in the LocoNet language to meet the needs of operators that wish to enforce a strict discipline in how operators gain access to locomotives during an operating session. Dispatching also lets you run consists with basic throttles that can't set up their own consists and run four digit addresses on basic throttles that only have two digit capability. It lets you have newcomers run trains on the layout without giving them access to the entire operation. When you dispatch a locomotive address or consist to your LocoNet system, you make it available to be ...

KB765 DT402 & DT400 Series Throttle L (Left) & R (Right) Throttle Display

The DT402/DT402 series throttles have displays which give you information about the performance of your railroad.The decoder address selected on the L Throttle is displayed on the bottom line of the LCD to the left of the Mode Indicator. The decoder address selected on the R Throttle is displayed on to the right of the Mode Indicator. The address can show as either the 2-digit or the 4-digit decoder address. If no address is selected the display will show “SEL.” If a 2-digit address is selected (00-127), the display will show two or three digits. If a 4-digit address is ...

KB456 DT402 & DT400 - Fast Clock Operation

Many operators use a fast clock during operating sessions to simulate prototypical operations. Traditionally, the fast clock is on the wall in view of the train operators; it is set up to run at a faster than real time so that an operating session can simulate prototypical operation on a compressed time scale. LocoNet has its own networked fast clock for all Digitrax throttles connected to your system. The fast clock display is a 4 digit 12 or 24 Hour format clock. To display the fast clock simply press the CLOC c Key. The fast clock display will remain active while ...

KB731 DT402 & DT400 Series Throttles - Locomotive Direction Control

DT402 & DT400 Series Throttles Locomotive Directrion Control There are two ways to change the direction of the locomotive address from the DT402 and DT400 Series Throttles:Double click the Throttle Knob to reverse the direction of a locomotive running on that throttle:1. Double click the Throttle knob that is controlling the locomotive. Press down on the knob quickly two times (2 distinct key presses within 1/2 second).2. The locomotive selected on that throttle will change direction.3. Repeat the process to reverse again, etc.4. Double clicking the R Throttle knob will reverse only the locomotive running on that throttle. Double click ...

KB27 DT402 - Controlling Functions

The DT402 Throttle will control up to 29 functions in walkaround and radio modes. When operating in IR Mode the DT402 series throttles will control up to 9 functions (F0-F8). The numeric keypad is always active in the normal Fn operation mode. The functions that are currently on for the active loco will be displayed on the top line of the DT402 display. The following figure shows an example of how the display looks when functions 0 and 1 are turned on for loco 1652 on the R Throttle. Controlling Functions F0-F12 1. Determine which throttle you want to control ...

KB434 DT402 & DT400 - EXIT Key

  If your DT402 or DT400 display isn’t showing you what you expect based on the manual, press the EXIT Key to return to normal operating mode-Fn. Then try the throttle task again.

KB744 DT402 & DT400 Series Throttle Exit Key

The EXIT Key is used to exit the current throttle task without making changes. Pressing this key will usually return the DT402 and DT400 series throttles to Fn mode for regular locomotive operation.

KB758 DT402 & DT400 Series Throttle Function Key

The FUNC Key is used to enter function control mode. Function control mode is the default mode for normal locomotive operation with the DT402/DT400 Series Throttles. Press this key during any throttle task to return to normal loco operation mode with function controls active on the numeric keypad.

KB766 DT402 & DT400 Mode Indicator

The mode indicator, located at the bottom center of the LCD, shows the DT402/DT400 series throttles' current mode of operations. The DT400 automatically defaults to the Fn mode & returns to this mode whenever the EXIT Key is pressed. The Mode indicator usually shows what the numeric keys are associated with. For example, in Fn mode, any entry on the numeric keypad will affect functions. In Sw mode, keypad entries will change turnouts and in Lo mode, entries on the keypad will enter loco address numbers, etc.

KB769 DT402 & DT400 Series LCD Loco Icon

On The DT400 and DT402 series throttles, the L & R Loco Icons are used to indicate whether an address is available for selection. A blinking loco icon means that the address is available for selection and a steady loco icon means that the loco address is currently selected or in use by another throttle.

KB777 DT402 & DT400 Series Throttle Basic Operation

1. Plug the DT402 & DT400 series throttle into any functioning Digitrax LocoNet System or other LocoNet compatible system and you are ready to go! You can use any LocoNet jack on your system.2. First, you will see the DT402 or DT400 version number screen: This screen shows the throttle's software version number. It is displayed for a few seconds each time you power on the throttle.3. Next you will see the power indicator screen: This screen indicates the power available to the throttle. When you are plugged in to LocoNet, this value will be between 9 & 15 volts. When you ...

KB768 DT402 & DT400 Series LCD Direction Indicators

On the DT402 and DT400 series throttles, the direction indicators are located in the LCD Display directly below the Loco Icon. There are separate indicators for the L (left) and R (right) throttles. If the arrow points to the front of the loco, the throttle is in the forward direction. If the arrow points to the back of the loco, then the throttle is in the reverse direction. If there is not a locomotive selected on a throttle the loco icon will not appear.Note: These direction indicators are for DCC equipped locos only. They will indicate direction based on the ...

KB737 DT402 & DT400 Series Throttles - Recalling a Locomotive

DT402 & DT400 Series Throttle-Locomotive Recall The DT402 & DT400 Series Throttles store the last 4, 8,or 16 unique loco addresses used by the throttle in a recall stack; your throttle defaults to a 4 address recall stack.  Users often discover this feature when taking their throttle for use on another Digitrax railroad; they plug their throttle into the new LocoNet and discover their own locomotive addresses are still in their throttle.  The presence of stored locomotive addresses may make operations on your railroad easier.For example if you have your throttle set up for an 8 deep recall stack and the last 8 ...

KB739 DT402 & DT400 Series Throttles - Fn Mode

Function or “Fn” mode is the default mode for the DT402 & DT400 throttles because it is the mode that runs your trains.In Fn mode, the throttle knobs, reverse direction keys and Y+/N- keys are used to control locos.  The numeric keypad is used to access functions for the currently active loco address.  In Sw Mode, the keypad is used to operate track switches. This means that you can continue to control your trains while turning on and off functions and operating turnouts.If a throttle has a locomotive address selected, the associated loco icon and direction indicator will be lit. In ...

KB742 DT402 & DT400 Series Throttle EMRG STOP Key

Your DT402/DT400 throttle comes from the factory set for “Local” Stop. When you press the EMRG STOP Key , the loco address that is active on your display (the one with the blinking smoke) will stop.When you press the EMRG STOP Key again, the loco address on the other throttle of your DT400 will stop.You can use the OPTN t Key to change the EMRG STOP to “Global” Stop.With global stop option enabled, pressing the EMRG STOP Key will stop all locos on the layout and you will see the throttle's track power indicator blinking on and off.To resume operations, press ...

KB735 DT402 & DT400 Series Throttle - Locomotive Speed Control

DT402 & DT400 Series Throttle - Locomotive Speed Control To control the speed of a locomotive:1. Select the loco address on either throttle2. Turn the throttle knob clockwise to increase speed and counterclockwise to decrease speed or3. Use the Y + & N- Keys to increase and decrease speed.The % of full speed will be displayed in the text line of the display on the L or R side depending on which throttle is controlling the loco. The % of full speed will also be displayed on the bar graph above the text area in the display.If a loco address is ...

KB451 DT402 & DT400 - Throttle Option 2 Default Decoder Status & Tetherless Operation

Throttle Option 2Throttle Default Decoder Status 128/28/14 speed steps Each DT402/DT400 can be set up to operate new decoders selected by that throttle as any decoder status code you choose. New decoders are defined as decoders that have not been selected in your system. Your throttle's default setting is to operate decoders that are 128 speed step capable, so when a new decoder is selected the throttle automaticaly assumse that all decoders selected are that 128 speed steps. If you operate mostly decoders that are only able to recognize 28 speed steps, you can change this setting.Tetherless Operation Mode Each throttle can be set up with radio ...

KB460 DT402 & DT400 - Operations Mode Programming

Ops Mode programming, also known as "Programming on the Main" lets you change the configuration of an individual decoder while the locomotive is on your railroad without having to move it to the programming track.Operations mode programming lets you program CVs in DCC locomotives equipped with Ops mode capable decoders while they are on the mainline. A typical use for Ops mode programming would be to change the acceleration rate (CV03) or the deceleration rate (CV04) of your locomotives to simulate the weight and braking capability of the train to compensate for changing the number of cars or power units on a ...

KB741 DT402 & DT400 Series Numeric Keypad

There is a numeric keypad on the DT402/DT400 throttle.  The numeric keys on the keypad are primarily related to the throttle mode shown in the LCD’s mode indicator area, but can be used for numeric entry and function control in other modes. For example, when the command station is in the Function Mode Fn, the numeric keys are used for function control. When the command station is in the Locomotive Mode,Lo, the numeric keys are used to enter loco addresses. When the command station is in the Switch Mode is Sw, the numeric keys are used to enter switch addresses.In ...

KB12 Programming CVs Other Than Addresses with DT402

There are 1024 different CVs that have been defined to handle many characteristics you might want to use for your locomotives. Your decoder manual has a complete listing of CVs that are available in specific decoders, what they do and suggested values for each CV. 1. Place the decoder equipped locomotive you want to program on the programming track. If you are using operations mode programming, the loco you want to program can be anywhere on the layout but it must have a decoder that is capable of ops mode programming installed. 2. Enter Program Mode by pressing the PROG ...

KB562 DT402 & DT400 - Programming Locomotive Addresses & other CVs

Programming the locomotive decoder with DT402 or DT400: Place the loco on the programming track 1.  Press the "PROG" key. 2. Make sure "Pg" is displayed in the bottom center of the display if you want to use Paged Programming Mode.   If not, press the PROG key until the programming mode you want to use is displayed.3. "AD2" should be displayed on the left side of the screen. 4. If you want a two digit address (01-127) use the right throttle knob and select the address you want to program into the loco.  If you want to program a 4 digit ...

KB30 DT402 - Display Basics

1. The DT402 handheld has two knobs called the L Throttle (Left) and the R Throttle (Right). The throttles are used for speed control, direction changes, and input of information for operation of your railroad. 2. The row of numbers (0-9) across the top of the display are the functions being used by the active locomotive throttle. 3. The larger numbers in the middle of the screen indicate the speed of the locomotives being controlled by the throttles. 4. The numbers at the bottom of the display are the locomotive addresses, and correspond to the digital decoder that is in ...

KB573 DT402 or DT400 MU Adding a Locomotive to a Consist

Duplex Radio throttles (D throttles), do not have to be plugged in to add loco addresses to consists. Simplex Radio (R throttles) and Tethered/Infrared throttles must be plugged in to LocoNet to add loco addresses to consists.  To set up a consist using your DT400/DT402 Series throttle: 1. Select the loco address of the TOP loco on the R Throttle Knob. 2. Select the address of the loco you want to consist to the TOP loco on the L Throttle Knob. 3. Move the two locomotives into position. The locomotives can be headed in either direction. They can be adjacent to each other ...

KB453 DT402 & DT400 - Low Battery Power Indicator

While it is running as a tetherless throttle, the DT402 and DT400 R and D versions automatically check the power available to the throttle each time a battery is inserted and each time it is plugged into or unplugged from LocoNet. The battery's voltage will be displayed in the text area of the throttle briefly each time the throttle is plugged in or is unplugged from LocoNet. When you plug in to LocoNet the number displayed will be the power provided by LocoNet. This value will be between 9 & 15 volts. Other characters will also be displayed in the LCD depending on ...

KB776 DT402 & DT400 Series Throttle Display Basics

The DT402 & DT402's screens are an LCD (Liquid Crystal Display) that is designed to show you what you are controlling with the throttle.  It also facilitates programming and other features of the LocoNet system. 1. The handheld has two throttles called the left throttle (L) and the right throttle (R).2. There are two direction indicators. One for the L throttle and one for the R Throttle. If the direction indicator is lit, and there is smoke over the loco icon there is an address selected on that throttle.3. The direction indicator with blinking smoke indicates which throttle is currently active. The ...

KB740 DT402 & DT400 Series Throttle - Track Power ON & OFF

DT402 & DT400 Series Throttles Track Power ON and OFF When track power is on: The Throttle's Track Power Indicator is on solid (small dot in the top line on the right side of the LCD)   Command Station TRACK STATUS indicator is lit   and Command Station OFF LINE indicator is off To turn track power on: Press the PWR Key and the LCD will display a screen similar to this: Press the Y + Key to turn on track power. Press the PWR Key again to exit Power On/Off Mode. You may also press any other key to go directly ...

KB332 DT402 & DT400 Series Throttle Basic Operation and Quick Start Guide

These are the basic DT400 and DT402 series throttle operating instructions designed to get you “up and running” quickly and to minimize your “frustration level” as you learn to use the throttle.   Turning Track Status On and Off To run your layout you must be sure track power and track status are both ON.  Follow these steps with your DT400 or DT402 series throttle to do this. Press the "PWR" key on the bottom left side of the throttle. The words “+ON  -OFF” will come on in the display. Press the “Y +” key quickly and you should see the ...

KB34 DT402 - Controls

Remember, the EXIT Key will take you back to the Fn Mode for Normal Loco Operations.

KB459 DT402 & DT400 - Busy or Fail Message During Programming

A  “Busy” message during programming means that the system is temporarily busy.  Simply try the task again.  When the system is no longer busy, you will get a “Good” response. A  “Fail” message during programming means that there is a problem with the locomotive on the programming track.  Check to be sure the loco's wheels are making good contact with the programming track.  Make sure that the decoder is properly installed in the locomotive.   Make sure the connections to the programming track are secure.  Make sure the programming track is powered. 

KB732 DT402 & DT400 Series Throttles - Emergency Stop (Entire Layout)

To stop everything on the layout, press the PWR Key followed by the N - Key while the track power is on. This will turn track power off and will cause all locos to stop. Press the PWR Key followed by Y + Key again and the locomotives will start running again at the same speed they were running prior to STOP mode. To exit PWR mode, press the PWR Key or the EXIT Key.

KB743 DT402 & DT400 Series Throttle Enter Key

The ENTER key is used to complete the current throttle task and return to Fn mode for normal operations.

KB747 DT402 & DT400 Series Throttle PWR Key-Power

The PWR Key is used to enter power mode for turning layout power on and off. Once you press this key, you will be prompted to use the Y+ key to turn power on or the N- Key to turn power off.  The PWR Key is also used to turn on and off the flashlight feature. The flashlight LED will be on as long as you hold down the PWR Key.

KB748 DT402 & DT400 Series Throttle BACK Key

The BACK key lets you go back one step.

KB749 DT402 & DT400 Series Throttle FIND Key

The FIND Key is used in conjunction with a layout instrumented for Digitrax Transponding and locos or cars equipped with transponders to find the location of those pieces of rolling stock on the layout.

KB750 DT402 & DT400 Series Throttle EDIT Key

The EDIT Key is used to enter the Edit Mode for editing the fast clock, routes, signaling, etc. It is also used to status edit decoders while in locomotive address selection mode.

KB752 DT402 & DT400 Series Throttle DISP Key-Display or Dispatch

The DISP Key is used both for displaying programming information and dispatching loco addresses.

KB755 DT402 & DT400 Series Throttle Direction Reverse Keys

The L & R Direction Reverse Keys change the direction of travel of the loco on the related throttle when the throttle is in Fn (Normal Operation) Mode. The R Direction Reverse Key changes direction of the address on the “R” or Right Throttle. The L Direction Reverse Key changes direction of the address on the “L” or Left Throttle.  You can also reverse the locomotive by double clicking the throttle knob.

KB756 DT402 & DT400 Series Throttle SWCH Key

The SWCH Key is used for entering switch control mode. Once this key is pressed, you will be prompted to select a switch address and issue a thrown or closed command. Switch control mode is used in normal operation for operating turnout machines and in set up mode for setting up option switches in the throttle and command station.

KB757 DT402 & DT400 Series Throttle MU Key

The MU Key is used to enter consist or multiple unit (MU) set up mode.Once the MU Key is pressed, you will be prompted by the throttle to use the Y+ Or N- Keys to add locos to or remove locos from consists (MUs)

KB759 DT402 & DT400 Series Throttle L & R Semaphore Indicators

The L & R Semaphore Indicators are used when cab signaling is implemented on the layout. These semaphores offer three indications:

KB760 DT402 & DT400 Series Throttle Tetherless Indicator

The tetherless indicator shows when your throttle is using either infrared or radio communications.

KB763 DT402 & DT400 Series Throttle L & R Speed Bar Graphs

Each throttle has a bar graph located above the text area of the LCD. Each bar graph indicates the speed setting of the L & R Throttles graphically from a single dot (0% throttle) to 20 dots (full throttle).  This is useful when the text area is showing information other than speed.

KB764 DT402 & DT400 Series Throttle LCD Text Area

The Text Area of the LCD consists of the eight characters in the middle line of the display. This is where information like locomotive speed, decoder status, turnout position, fast clock, text prompts, messages and programming data are displayed.

KB779 DT402 & DT400 Series Throttle Layout Connection

The DT400 can be connected directly to the LocoNet port of your command station or to any Universal Panel of your LocoNet system.

KB746 DT402 & DT400 Series Throttle OPTN, "t" Key- Option or thrown

The OPTN t Key is used to enter the Option Mode to set throttle and system options. It is also used to issue t (thrown) commands when the throttle is in Switch mode.In the case of turnout control:t=thrown, when a "t" command is sent, the turnout is set for the diverging route through the curved leg.

KB564 DT402 or DT400 Series Throttle -Select a Locomotive Address to Run

Selecting a locomotive address to run on your DT4001. Place the locomotive you want to run on the track.  Turn the throttle knob you want to run a loco on slightly counter clock-wise letting the controller know you want to address that side. 2. Press the "LOCO" key 3. Select the address of the loco by entering it using the numeric key pad.,4. Press the "LOCO" key to complete address selection.

KB457 DT402 & DT400 Switch Mode - Turnout & Switch Operation

  What is Sw (Switch) Mode? Switch mode is used by throttles for sending commands to accessory decoders and for changing option switches in your LocoNet system. The most common use of switch mode is for operating turnouts.Switches are either thrown or closed.To change the position of a switch or turnout: 1. Press the SWCH key to enter switch mode. When you enter Switch mode, the throttle knobs & direction keys continue to control the loco addresses running on the throttle. Loco speed is displayed on the bar graph and loco direction is displayed on the direction indicators for each ...

KB745 DT402 & DT400 Series Throttle CLOC, "c" Key-Clock Display or closed

The CLOC, "c" Key is used to toggle between displaying and not displaying the current fast clock time. It is also used to issue c (closed) commands when the throttle is in Switch mode.In the case of turnout control:c=closed, when a "c" command is sent, the turnout is set for the main line with routing through the straight leg of the turnout.

KB770 DT402 & DT400 Series Liquid Crystal Display (LCD)

The DT400 has an informational liquid crystal display (LCD).The display shows: Mode Indicator   Track Power Indicator   Tetherless Indicator   Text Area   Throttle Addresses (L & R)   Throttle Direction (L & R)   Loco Icons (L & R)   Smoke Icons (L & R)   Functions 0 - 12, active throttle only   Bar Graph (L & R)   Semaphore Indicator (L & R), not currently implemented

KB10 DT402 DigiGroup Set Up - Q & A

What is the meaning of the colored lines and bars which show up in the chart portion of the DigiGroupSetup v1.03 window after pressing the "Start Chan Scan" button? The graphics show the peak signal and average detected while you let the scan run. This may be useful in helping you setup your layout for best Duplex performance. What is the "Group ID" number which is shown in DigiGroupSetup v1.03? The Group ID is typically used in the train show environment, where there may be several wireless networks operating at the same time. The unique Group ID allows new operators ...

KB773 DT402 & DT400 Series Throttles How to Select & Run a DCC Equipped Loco

How to Select and Run a DCC Locomotive Using a DT402 or DT400 Series Throttle 1. Activate the throttle's left throttle knob “L” by turning it a 1/4 turn in either direction or by clicking the throttle knob once. The left side address will begin flashing. If nothing is selected on this throttle it will flash “SEL”.2. Press the LOCO Key. The left side of the display will begin flashing. The illustration above shows the LCD display just after you press the LOCO Key to select an address on the L Throttle when nothing has been selected on that throttle before and ...

KB767 DT402 & DT400 Series Throttle Smoke Icon

The Smoke Icon is located just above the Loco Icon. Both the L & R Throttles have a smoke icon. If a loco is selected on either throttle, the Loco icon will appear beside the address of that loco. If nothing is selected, there will be no Loco icon and the address area will show SEL. The blinking smoke icon indicates which throttle is currently active (having its function states displayed in the top line of the LCD). Since both throttles must share the keypad, only one at a time can have access to the keypad and function controls. The ...

KB542 DT402 & DT400 Series Throttles - Programming DS54 CVs

  Changing the value of a DS54 Configuration Variable with a DT400 is easy if you follow the steps listed below. 1) Disconnect the DS54 from the LocoNet, aux power source, all inputs and all outputs. 2) Short the pins of the Enable Link. 3) Connect the DS54 track terminal inputs to the isolated programming track.4) Connect the yellow (feedback) wire from any DS54 Output (A, B, C or D) to either rail of the isolated programming track. 5) DT400 Programming Steps:  6) Remove the yellow feedback wire connecting the output connector to the isolated programming track.7) Remove the wires ...

KB728 DT402 & DT400 Series Throttles - Controlling Functions For Locomotives In A Consist

Even though an individual locomotive is part of a consist and you can’t control its speed and direction separately from the consist, you can still control its function outputs independently as follows:1. Press the LOCO Key and select the address of the locomotive that is a part of consist for which you want to control functions.2. Press the LOCO Key again to select the loco address to your throttle. The speed value will show “cn” to remind you that you can only control functions on the loco and not its speed.3. Use the steps described above to turn on or ...

KB738 DT402 & DT400 Series Throttles - The SEL Message & Selecting An Address

DT402 & DT400 Selecting and Running A Locomotive If a throttle knob does not have a locomotive selected when you make it active by turning or pressing the L or R Throttle knob or Reverse Key, flashing “SEL” will appear in place of the locomotive address in the LCD display. This is a prompt for you to select a locomotive on that throttle. 1. Choose which Throttle (L or R) you want to use to run a locomotive.Make it the active throttle by turning it a 1/4 turn in either direction or by single clicking the throttle knob. If there ...

KB458 DT402 & DT400 - Read Back CVs

The DT402 & DT400 can program and readback CVs with the DCS100 or DCS200 (Super Chief) or the DCS51 or DCS50 (Zephyr). You must use the programming track for this unless you are using Ops Mode with transponding installed to allow for Ops Mode readback.  Infrared and simplex radio throttles must be plugged in to LocoNet to read back CVs & their values.  Duplex radio throttles do not have to be plugged in for reading back CVs.Systems with a DB150 command station (Super Empire Builder) are not able to read back CV Values programmed into decoders. To read back CV values: 1. Place the decoder ...

KB563 DT402 & DT400 - Multiple Unit Operation Consisting

To run two or more locomotives together as a multiple unit lash up or consist controlled by a single locomotive address: Place the two or more units you wish to MU on the track. 1. Select the TOP loco (the one that will control the consist) on the right hand throttle knob. 2. Select the loco to be added to the MU on the left hand throttle knob. 3. Make sure all the locos in the consist are traveling in the same physical direction on the track (both going to the left or to the right) 4. Press the "MU" key 5. Press the "+" key 6. ...

KB734 DT402 & DT400 Series Throttle - Bring Locomotive to a Complete Stop

Bring Your Locomotive to a Compete Stop Turn the Throttle Knob that the loco address is selected on counterclockwise until the speed display shows 00 and the loco stops moving. This lets you slow down your loco and stop it in a prototypical manner.If you have set up deceleration for the loco and you move the throttle knob to 0% speed, your loco will slow down and come to a stop at the programmed deceleration CV value.   We strongly recommend that you run your locos with the factory default of no deceleration until you are familiar with your system. If ...

KB464 DT402 & DT400 - Programming Mobile Decoder Addresses

  Duplex Radio Throttle do not need to be plugged in to LocoNet to Program Decoders.  Simplex Radio & Infrared throttles must be plugged in to LocoNet to program CVs on the programming track. Ops Mode Programming can be done without plugging radio throttles in to LocoNet. IR throttles must be plugged in for Ops Mode Programming. 1. Be sure that only the loco you want to program is on the programming track. If you are using operations mode programming, the loco you want to program can be anywhere on the layout but it must have a decoder that is ...

KB771 DT402 & DT400 Series Throttles L (Left) & R (Right) Throttle Knobs

Digitgrax refers to the throttle knob on the left side as the L Throttle and the throttle knob on the right side as the R Throttle. This corresponds to the L & R that appears on the throttle. The throttle knobs on the DT400 use “encoders.” They give very smooth, fine speed control. In 128 speed step mode it takes four complete rotations of the knob to go from stop to full speed. When you select a locomotive that is already moving on either throttle knob, that throttle will continue to run the locomotive at the same speed and in the ...

KB461 DT400 & DT402 - Programming CVs other than address

In addition to the locomotive address, there are different Configuration Variables (CV's) that have been defined to handle many characteristics you might want to use for your locomotives. These include operational characteristics such as acceleration, headlight functions and others. The manual for each decoder type has a complete listing of CVs that are available in specific decoders, what they do and the suggested values for each CV. Simpler decoders have few CVs while advanced decoders may have many different CVs 1. Place the decoder equipped locomotive you want to program on the programming track If you are using operations mode ...

KB736 DT402 & DT400 Series Throttle - Stealing and operating a stolen loco address

Stealing is  also known as Forcing An Address Selection or SharingIf you try to select a loco address that is already selected on another throttle the DT400 will display “Steal?=Y” in the text area. This is a safety interlock to prevent operators from taking control of locos that are already selected on other throttles. Occasionally it is necessary to override this interlock to gain control of a loco that is “lost” for whatever reason. This override is called stealing & can result in having a single loco address selected on two different throttles at the same time.To steal an address ...

KB1035 DCS240 FAQ

DCS240 FAQ   I’m getting a “StealZap” or message on my DT402 rev 2 throttle. What is this? This is a feature that helps prevent having the same address selected on multiple throttles and creating unexpected operations.  When you steal you are truly stealing control of the locomotive instead of sharing it as was the case before the DCS240 and DT402 R2 firmware were released. When using a DT402 R2 throttle with an Advanced Command Station featuring expanded slots, each throttle ID is associated with the Loco Addresses it has selected.  When you select a Loco that is selected on ...

KB105 Super Empire Builder Quick Start Guide

These instructions will get you up and running quickly. A full description of all controls and technical reference information are included later in this section of the Tech Support Depot. This section assumes that you are using a new set straight out of the box. If your set is radio equipped, we recommend that you follow this quick start guide without using radio to learn the basics. When you are successfully running your radio throttle tethered to the system, then go to the DT400 series tetherless overview article to learn how to install the radio option. Connect the DB150 to the ...

KB915 Simplex Radio Safety Selection-Why Do I Have To Plug In To Select A Loco?

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 ...

KB913 Adding Radio or IR

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 ...

KB840 Zephyr - Functions F0-F8

DCS50 Zephyr can control Functions F0 - F8. Most DCC mobile decoders have function outputs that you can use to control lamps, LEDs, sound, smoke generators and other on/off devices installed in your locomotives. Most locomotives made today come with a head light and sometimes with a rear light, too. With DCC, these are controlled by the decoder’s function outputs. You can also install additional DCC controlled lighting such as cab lights, Mars lights, ditch lights, rotating beacons and others on your locos. The addition of these functions can add to the fun and realism of your locomotives.You must have ...

KB44 UR91 (Simplex Radio Receiver) - Upgrade to UR92 (Duplex Radio Transceiver)?

Can a UR91 be returned and upgraded to a UR92? No. Our recommendation is that when upgrading to the DT402 throttle, the layout owner purchase a new UR92, but keep the UR91 installed for those who still have the simplex radio throttles. That way anybody can run on the layout.

KB417 Converting to Radio

Q:  If you buy the infra ready set and down the road want to upgrade to the radio is it necessary to buy a whole new set? If not what is required to upgrade the existing set? A:  The DT400 or DT402 can be converted to DT402D duplex radio or DT402R simplex radio.  The conversion must be done by Digitrax. If you plan on using the IR features of the DT400 or DT402 , you will need one or more UR90 infrared receivers.If you convert the DT400 or DT402 to duplex radio, you will need a UR92 duplex transceiver which handles both infrared ...

KB879 Broadway Limited Locomotives F9-F12 with Digitrax

Function Controls F9-F12 Not Responding Properly on Broadway Limited LocomotivesSome Broadway Limited Locomotives use Functions F0-F12 when running in DCC mode. In some cases F9-F12 do not respond properly. To remedy this problem, simply reset the locomotive to the factory default setting per the Broadway Limited Instructions you received with your locomotive.Note: F9-F12 are accessible on the DT400 & DT402 series throttles when used in conjunction with the DCS100 command station.

KB1023 Soundtraxx Tsunami CV47 Playable Whistle

There have been several inquiries lately about Tsunami CV47 and the Playable Whistle function of the DT400 and DT402 throttle.  Digitrax does not use CV47 for any of its decoders and therefore this CV is not mentioned in our documentation. After doing some research we found that CV47 must be programmed to a value of 127 to enable the Playable Whistle on Soundtraxx Tsunami decoders.    

KB449 Ballistic vs. Straight Line Throttle Knob Tracking

Ballistic TrackingWith ballistic tracking, the faster you increase or decrease the the throttle knob, the faster the data changes in the throttle. When ballistic tracking is enabled, so are typematic keys. With typematic keys, when you press and hold the Y + or N - Keys, the values will continue to increase or decrease without having to do a separate key press for each increment. DT402/DT400 are shipped with ballistic tracking enabled as the factory default setting. Straight Line TrackingWith straight line tracking each movement of the throttle knob causes a fixed rate of change. When you use straight line ...

KB841 Zephyr - Functions

DCS50 Zephyr can control Functions F0 - F8. Most DCC mobile decoders have function outputs that you can use to control lamps, LEDs, sound, smoke generators and other on/off devices installed in your locomotives. Most locomotives made today come with a head light and sometimes with a rear light, too. With DCC, these are controlled by the decoder’s function outputs. You can also install additional DCC controlled lighting such as cab lights, Mars lights, ditch lights, rotating beacons and others on your locos. The addition of these functions can add to the fun and realism of your locomotives.You must have ...

KB572 DT400 Series Throttle - Removing A Loco From A Consist

  To remove a loco address from a consist using a DT400 or DT402 Series throttle: Note: Duplex Radio throttles can remove locos from consists without the need to plug in to LocoNet.  Simplex Radio & infrared throttles must be plugged into LocoNet to remove loco addresses from consists. 1. On the L Throttle Knob, select the loco address that you want to remove from a consist. 2. Press the MU Key to enter consist mode. 3. Press the N - Key to remove the loco address from the consist. 4. The L Throttle automatically becomes active with the loco ...

KB315 Resetting Super Chief

There are times, when all else has failed, that it is best to simply start over. To reset Super Chief, you can use the Chief's option switches to start fresh. *Special Instructions for DCS100 Op Switches 36, 37, 38, & 39 For Op Switch #36-#39 to work properly:   In this example, a complete reset will occur (Option Switch 39). 1. Place the DCS100's MODE toggle switch on the DCS100 in the Center OP position 2. Press the SWCH key on the DT400/DT402/DT500 3. Press 3 and then press 9 4. Set the OpSw of choice to c by pressing the ...

KB16 Which Throttle works with which Universal Panel, UR90(IR), UR91(Simplex Radio) or UR92 (Duplex Radio)?

The following chart indicates: Which Digitrax throttle (DT400, DT400R, DT402, DT402R, DT402D, DT500, DT500D, UT4, UT4R, and UT4D) Works with which LocoNet interface throttle panel (Universal Panel, UR90, UR91, and UR92) 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 DT400 Yes Yes Yes Yes Yes No Yes Yes No DT400R Yes Yes Yes Yes Yes Yes Yes Yes No DT402 Yes Yes Yes Yes Yes No Yes ...

KB106 Super Empire Builder Components

Your Super Empire Builder Starter Set contains: The DB150, which is the system’s DCC command station. It generates the DCC signals that control decoders and other devices on your layout. The DB150 is also a DCC booster. Boosters receive DCC signals from the command station, amplify them and put them on the track along with the power from the transformer to run the locomotives. You can have several boosters on your layout to provide additional power to run more locos. Depending upon the set, there is either a DT402 or DT402D (duplex radio throttle), which is the DCC throttle that ...

KB577 DT400 - Playable whistle on F2 button

  Q:  I have read in some of the model magazines that the F2 button on the DT400 is a pressure sensitive playable whistle button. I have not noticed any difference in sound with the F2 button on my DT400. Is there some way to determine if this feature is present on my throttle? A:  Most Digitrax DT400 and all DT402 series throttles have the capability of implementing the playable whistle feature when used with Digitrax sound decoders.Prior to the release of Digitrax sound decoders this feature was considered as an experimental throttle feature and was not fully documented. Once Digitrax released ...

KB238 Zephyr Xtra, Super Empire Builder Xtra or Super Chief Xtra? What's the difference among the Digitrax Sets?

  Zephyr Xtra                             Super Empire Builder Xtra                            Super Chief Xtra                                                Command Station DCS51 DB150 DCS100 Current Rating 3 Amps 5 Amps 5 Amps or 8 Amps Throttle DCS51 DT402 DT402 Throttle Controls Single Knob, Direction Switch Dual click encoder throttles Dual click encoder throttles Function Control F0-F29 F0-F29 F0-F29 Keypad Full Numeric Keypad Full Numeric Keypad Full Numeric Keypad Display Large LED Multi-line Backlit LCD Multi-line Backlit LCD Throttle Capacity 20 22 120 Loco Capacity 20 22 120 Loco Address Range 00-9000+ 00-9000+ 00-9000+ Stationary Address Range 01-999 00-999 00-999 Turnout Position Reporting Yes, last command sent Yes, last ...

KB45 Duplex Radio, Simplex Radio & Infrared-How do they work together?

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 ...

KB958 Digitrax Starter Set Comparison

  Zephyr Xtra Super Empire Builder Xtra  Super Chief Xtra Command Station DCS51 DB150 DCS100 Current Rating 3.0 Amps 5 Amps 5 Amps or 8 Amps Throttle DCS51 DT402 DT402 Throttle Controls Single Knob, Direction Switch Dual click encoder throttles Dual click encoder throttles Function Control F0-F28 F0-F28 F0-F28 Keypad Full Numeric Keypad Full Numeric Keypad Full Numeric Keypad Display Large LED Multi-line Backlit LCD Multi-line Backlit LCD Throttle Capacity 20 22 120 Loco Capacity 20 22 120 Loco Address Range 00-9000+ 00-9000+ 00-9000+ Stationary Address Range 01-999 00-999 00-999 Turnout Position Reporting No Yes, last command sent Yes + actual ...

KB468 Zephyr - Consisting Tail to Tail

Q:  I'm wanting to know how to MU two locomotives together that are in a tail to tail configuration. I know that this can be easily done with a DT400 or DT402 throttle but not sure how to do it with the Zephyr. A:  Make sure all the locos in the consist are traveling in the same physical direction on the track (both going to the left or to the right). Remember that "reversing" takes place in the locomotive not on the track, so it is important that the engines be traveling in the same direction when they are MU'd.  ...