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Details the DR4088LN-xx as a 16-input feedback module connectable via LocoNet, available in CS, OPTO, and GND versions.
Lists input capacity, load limits, and peak load for DR4088LN variants.
Identifies connectors, buttons, and LEDs on the DR4088LN-xx module.
Explains the 24-month manufacturer's warranty and conditions that void it.
Covers product changes, data binding, and reproduction rights for the manual.
Explains LocoNet as a universal bus system supporting up to 2048 feedback addresses.
Details programming the DR4088LN-xx via DR5000 or control panel/app without other DR4088 modules.
Guides on programming the DR4088LN-xx with multiple DR4088 modules connected via S88.
States the DR4088LN-xx has no factory reset function; re-setting address is sufficient.
Introduces connection examples for the DR4088LN-xx, noting limitations in coverage.
Illustrates connecting DR4088LN-CS modules to a DR5000 for 2-wire track feedback.
Shows connection of DR4088LN-CS modules with a DR5033 Booster for 2-wire track feedback.
Diagram for connecting DR4088LN-OPTO with Hall sensors on a 3-wire track system.
Diagram for connecting DR4088LN-OPTO with switch track on a 2-wire system.
Diagram for connecting DR4088LN-GND with switches, buttons, and reed contacts.
The DR4088LN-xx is a versatile feedback module designed for model railway enthusiasts, enabling seamless integration with a control panel via LocoNet®. This module is equipped with 16 feedback inputs, allowing for comprehensive monitoring of your model railway layout. It comes in three distinct versions to cater to various track configurations and sensor types: the CS version (current sensor 2-wire track), the OPTO version (for connecting reed contacts and 3-wire track signals to track ground), and the GND version (for 3-wire tracks).
The primary function of the DR4088LN-xx is to provide feedback from your model railway layout to your central control unit. This feedback is crucial for automated operations, track occupancy detection, and precise train control. By detecting the presence of trains or the activation of sensors, the module sends signals back to the control panel, allowing the system to react accordingly. For instance, in the CS version, current sensors detect a train's presence on a 2-wire track by monitoring current draw. The OPTO version offers flexibility by supporting reed contacts and 3-wire track signals, providing optical isolation for enhanced reliability. The GND version is specifically designed for 3-wire track systems, although it comes with an important caveat regarding its use with certain central units.
The module operates within the LocoNet® universal bus system, which supports a maximum of 2048 feedback addresses. This extensive addressing capability allows for very large and complex layouts to be monitored effectively. The addresses are stored directly within the feedback module, simplifying setup and ensuring consistent operation. LocoNet®'s flexible topology supports tree, star, or bus (line) networks, and even combinations thereof, offering considerable freedom in designing your layout's wiring. However, it's important to note that a ring structure is not permitted within the LocoNet® framework.
Setting up and programming the DR4088LN-xx is a straightforward process, whether you're using a DR5000 central unit or another control panel or app. The module's programming involves assigning a start address and specifying the number of feedback units it manages. This is done by sending specific turnout commands to the module while it's in programming mode.
To program the module, you first connect it to your central unit. If you're using a DR5000, you'll open the DR5000 Tool. The programming sequence begins by pressing the programming button on the DR4088LN-xx, which causes a green LED to flash, indicating it's ready for input. You then assign the start address by switching a turnout address (e.g., 1) once, typically by activating either the red or green state. The green LED will then change its flashing pattern, signaling that the module is now expecting the number of feedback signals. You send this information by again using a turnout command corresponding to the desired number of feedback units. For instance, if no other DR4088 (S88) modules are connected, the default number of feedback units is 16. Once these two steps are completed, the DR4088LN-xx automatically exits programming mode, having been successfully configured with its start address and the number of feedbacks.
When integrating the DR4088LN-xx with additional DR4088 modules on the S88(N) connection, the programming process is similar but accounts for the larger number of feedback contacts. A single DR4088LN-xx can manage up to 15 additional DR4088 modules connected via S88, resulting in a maximum of 256 feedback contacts. In this scenario, the turnout commands sent during programming will correspond to the total number of feedback units across all connected modules (e.g., 32 for one DR4088, 48 for two, 64 for three, and so on).
The hardware overview of the DR4088LN-xx highlights its user-friendly design. It features clearly labeled connections for feedback inputs (1 to 8 and 9 to 16), common "C" connections for detector groups, and LocoNet® connectors for bus integration. A programming button facilitates easy entry into programming mode. LED indicators provide visual feedback on the module's status: a green LED flashes when power is supplied and signals different programming levels, while a red LED flashes during load or activity at the S88N connection. S88N In connectors are also present for daisy-chaining multiple S88 modules.
A key aspect of the DR4088LN-xx's design is its simplicity regarding maintenance and resetting. Unlike some other devices, the DR4088LN-xx does not have a function to reset to factory settings. This is because its only configurable parameters are the start address and the number of response addresses. Therefore, a full factory reset is deemed unnecessary.
If you need to "reset" the module to its basic settings, you simply reprogram it with the desired start address (typically 1) and the default number of feedbacks (16). This process, as described in the programming section, effectively reconfigures the module to a known state without requiring a dedicated reset button or complex procedure. This design choice emphasizes ease of use and reduces potential complications associated with accidental resets.
A critical note for users of the DR4088LN-GND version, especially when paired with DR50xx central units, concerns 3-wire operation. Due to the H-bridge (track output) in the DR50xx, feedback devices in the DR4088LN-GND version must not be used against track ground, as is typically done with 3-wire tracks. Failing to observe this warning will inevitably lead to the destruction of the DR50xx central unit. If you are operating a 3-wire track system with a DR50xx and require feedback against track ground, the DR4088LN-OPTO version should be used instead, as it provides the necessary isolation to prevent damage.
The DR4088LN-xx is a robust and flexible solution for integrating feedback into your model railway, offering clear programming procedures and a design focused on reliable operation within the LocoNet® ecosystem.
General| Manufacturer | Digikeijs |
|---|---|
| Product Category | Control Unit |
| Current Detection | Yes |
| Bus System | LocoNet |
| Series | DR4088LN |
| Communication | LocoNet |
