Product Support for: Throttles -> Duplex Radio Equipped Super Throttle (DT402D)

When I plug in a DT402D throttle to LocoNet using a DCS240 as my Command Station, it flashes the display as normal then fades and continues to reset. Make sure you have a charged battery installed in your DT402D.  The DT402D is attempting to power on the RF24 radio in the throttle and register with the UR92.  Without a battery it cannot draw enough power from LocoNet to complete this procedure. If you plan to use your DT402D as a tethered throttle it is recommended that you use throttle options to turn off the throttles duplex radio capabilities.  Press OPTN ...

Join Your Throttle to the Duplex Group 1. Connect a DT402D Duplex Radio Throttle with an installed battery to the front RJ12 jack of the UR92 for about 2 seconds. 2. Disconnect the DT402D from the LocoNet jack. The DT402D will briefly display an 8 character Duplex Group name and the Channel number being used by the UR92 Group. The actual Duplex Group name is not important at this point, it is simply used by the DT402D to join this Duplex group on its particular Duplex channel (#11 through #26). 3. Now that the DT402D has joined the Duplex group, ...

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 ...

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 ...

  Digitrax Duplex Wireless Functional diagnosis and debug process:   Duplex Background:  The Digitrax Duplex radio system is a two-way RF radio link connecting wireless throttles (DT402D & UT4D) via a UR92 onto LocoNet.  It operates on one of 16 user-selected channels in the 2.4GHz Wi-Fi frequency band.  FCC rules requires that all WI FI devices including the RF24 Duplex transceivers (part of Digitrax Duplex throttles and the UR92) operate co-cooperatively in this 2.4GHz band and have to accept whatever wirelessenvironment is present.  This means that there is no guarantee that Digitrax Duplex will work in all situations or that it will ...

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 ...

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 ...

Clarifications of UR93 and DT602D/UT6D Duplex RF and network performance: The new UR93 and DT602D and UT6D throttles employ the new Digitrax designed and manufactured RF28 Modular Certified 2.4GHz transceiver module. The RF28 is configured to interoperate with existing Digitrax Duplex UR92 LocoNet access points and e.g. DT500D and UT4D throttles worldwide. All Duplex units employ IEEE 802.15.4 PHY/MAC compatible devices using 2.4GHz Direct Sequence Spread- Spectrum (DSSS) modulation. The RF28 was developed for: a)  Smaller size. The venerable RF24 could not fit in the small UT6D, and this case was designed in 2017, so a new smaller Duplex support ...

Setting Duplex Group Name You can use the DT402D to edit the UR92’s Duplex Group name to one you prefer. Note that this change is optional, and the UR92 factory default will always work out of the box.   The Duplex Group Name is stored in non-volatile memory and is remembered even when unpowered or disconnected from your system.   You should have all UR92s connected prior to changing the Group name or they will automatically renegotiate and may change the preferred name to a default.  1. Connect the DT402D or DT500D to the front RJ12 jack of any UR92 ...

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 ...

The UR92 ships from the factory with the default Duplex Group default radio channel set to 11. You can select channels 11 through 26 for the radio channel. 1. Plug a DT402D throttle into the UR92. 2. Press the EXIT key. 3. Press the OPTN key then the EDIT key. 4. Press the Y / + key to increase the channel number, or 5. Press the N/- key to decrease the channel number. In the example below, we have changed the Group name to JBS&J RR and entered 21 for the channel number. 6. Repeat step 4 or 5 until ...

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 ...

   Setting the Duplex Group Channel:  1. Connect the DT402D to the front RJ12 jack of any UR92 on the LocoNet.2. On the DT402D press the opTN key and then the EDIT key.  The Group Channel Numer (11-26) will now show in the lower left hand side of the display. 3. Use the Y/+ key to change to a higher channel in the available range of 11 through 26.  The N/- key will change to a lower channel.  4. Press the ENTER key to update the current displayed characters as the new UR92 Duplex Group Channel. To skip making any changes, ...

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 ...

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 ...

Adding UR92s will provide better signal coverage for complex layouts. If you are adding more than one UR92, be sure to connect all of the units before changing the Duplex Group name or channel number or you will have the units automatically re-negotiate these values with each addition. 1. Add the UR92(s) to your LocoNet. (See UR92 Installation articles, below.) 2. After adding extra UR92s, use the DT402D to turn OFF layout track power and then turn track power back ON. This forces all the UR92s to automatically negotiate a common and permanent single Duplex Group name and channel number. ...

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 ...

Troubleshooting Your Installation To get the best performance out of your duplex radio installation, walk around the layout and check Duplex operation to ensure complete signal coverage. Depending on the layout size and geometry and surrounding materials it is often possible to move the UR92(s) to better cover dead-spots. Experimenting with UR92 location usually will quickly provide a position that is best for most layouts. Note that DT402D orientation and your body position may also affect range and reception. On very large layouts or layouts with problem areas, it is possible to add more than one UR92. Adding extra units ...

What is the difference between Simplex and Duplex wireless operations and what are the advantages of each?The Digitrax DT400R, DT402R and UT4R throttles operate at the 916.5Mhz radio frequency.  These throttles both use the UR91 for radio communication.  The DT402D and UT4D operate at 2.4Ghz.  They require the UR92 for radio communication. The move to Duplex is meant to improve radio operations and add radio range.  Simplex (UR91) and Duplex (UR92) can operate on the same layout without any issues or interference with each otherWith duplex radio: You’ll select and run your locomotives without plugging in.   You'll dispatch locomotives ...

Configuring the Duplex Group Password The UR92 ships from the factory with the default Duplex Group Password of 0000, the value that disables password requirements. You may have an occasion when operating in a multisystem environment when you may want to restrict access to your layout and operating system via a tetherless Duplex Throttle. The password for your Duplex Group may be activated or changed: 1. Plug a DT402D or DT500D throttle into the UR92. 2. Press the EXIT key. 3. Press the OPTN key then the EDIT key. 4. Enter a 4-digit number using the numbers on the keypad ...

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 ...

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 ...

  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 ...

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 ...