LS100/110 Accessory Decoder

The accessory decoders LS100/LS110 are the links between the DIGITAL plus system and the accessory devices (e.g. turnouts, signals, uncoupling ramps, etc.) on your model railroad.

Please select from the following


General Information

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Features of the accessory decoder LS100/LS110

The special features of the accessory decoder LS100/LS110 include the choice of an external power supply and the possibility to individually program each output to different modes. Each of the outputs can be set to continuous or momentary action with variable pulse length or to a flashing mode. They allow the direct connection of bulbs or LED's without additional relays.

The maximum voltage of the external power supply is 16 volts AC or DC.

The maximum current rating is

for a single output 0.75 A continuous

3 A peak

(less than 1 sec.)

for the entire decoder 3 A continuous

for the sum of all outputs in use

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Details for the properties of the different output modes

Momentary output, retriggerable:

Momentary output, not retriggerable:

Continuous output:


In addition to these features, the accessory decoder LS100 can send the position of the connected turnouts to the Command Station LZ100 through the Feedback bus.

Please remember when programming the unit, that several of the outputs might be active at the same time, depending on the pulse duration in momentary mode or continuous mode. The maximum permissible current draw of the connected accessories through the accessory decoder is 3 A.

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The Connectors of the Accessory Decoder LS110

The terminals marked with the symbol supply the decoder internal negative potential. These terminals are needed for programming and to connect to external track contacts.

Figure 1:The terminals of the LS110.

The Power Station LV100 is connected to the terminals J and K. The cable connected to these points supplies the commands to the decoder. The cable should be a twisted pair.

The terminals with the AC symbol('~') are for connecting a 16 Volts AC power supply. This supply powers the accessory decoder and the accessories themselves. Since the accessories are powered from the external supply, they do not use the 'expensive' digital power. If necessary, it is possible to use the digital power instead.

The three pole terminals labeled 'Ausgang 1' to 'Ausgang 4' (German for 'Output 1' to 'Output 4') are connected to the accessories.

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Connecting the LS110 to the Power Station and to an external power supply

Before connecting your accessory decoder LS110 to the DIGITAL plus components and the power supply, the DIGITAL plus system and the power supply should be switched off (Please disconnect the power line plugs).

There are 2 possibilities for connecting the LS110: With or without separate power supply.

Connecting with an separate power supply:

Figure 2: Connecting the LS110 to the LV100 and a separate power supply Figure 3: Connecting the LS110 to the LV100

Connecting without a separate power supply:

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Connecting the Accessories

Figure 4: Connecting the accessories to the LS100 Connecting twin-coil switch machines:

The common terminal (2) of both coils is wired to the terminal 'C'. The wire from coil number 1 (1) is connected to the '+' terminal; the wire from the coil 2 (3) is connected to the '-' terminal. Depending on the wiring of the switch machine, this will result in a specific route upon activation of the '+' contact, for example 'diverging'. In order to adjust the route to your preference, you may exchange the wires leading to the '+' and '-' terminals.

The following table gives the color codes for some (European) manufactures of twin-coil switch machines with respect to the numbering in figure 4.

Cable No.: 1 2 3
ROCO red black green
Arnold blue gray violet
Fleischmann beige black brown
Trix yellow black green
Märklin blue yellow blue
Connecting Signals with Bulbs or LED's:


Connecting a slow-motion turnout motor:

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Programming the Address and the Output Modes

The following section explains the programming of the accessory decoder LS100 and LS110. The difference between the two models is the added feedback with the LS100. This difference does not influence the programming of the decoder.

First of all, you have to decide which number to assign to the accessory decoder, the address of the accessory decoder has to be programmed. In the second step, the features of the outputs are determined.

Explanation of the turnout addresses

The LS100/LS110 is always programmed for a group of 4 turnout addresses. These are for example the numbers 1 to 4, 5 to 8, 9 to 12, up to 253 to 256. It is not possible to program a single LS100/LS110 unit to the numbers 3, 4, 5, and 6, since these numbers belong to 2 different groups.

The default settings for the accessory decoder LS100/LS110

The LS100/LS110 is programmed for the turnout numbers 1 to 4 before shipping. The outputs are set to Momentary Action with the shortest possible pulse duration. This setting of the output is called the default setting.

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Programming the LS100/LS110 to its default setting by hardwiring

At this point, it is assumed that the Command Station, the Hand Held and the Power Station are correctly set up (see the manuals for these units).

Figure 5: Connecting the wire bridge to the LS100/LS110

  1. Please turn off the track voltage and the supply voltage to the LS100/LS110 (remove the wires).
  2. Using a short piece of wire, please connect the + terminal with the terminal, as shown in figure 5.
  3. Please connect the terminals J, K and ~ on the LS100/LS110 to the track output of the power station LV100.
  4. Please turn on the track power.
    Remark: Figure 5 shows the LS110. With the LS100, all the connection are identical.
  5. On the Hand Held LH100 select the modus 'switch turnout' (press F, 5). Enter one of the 4 turnout addresses that the LS100/LS110 should be programmed to. Confirm the number by pressing 'Enter'. Press the '+' or '-' button on the Hand Held.

This last step triggers the LV100 to send the switch command through the track output. This command includes the turnout address, which is read by the accessory decoder and stored in memory at location 1. At the same time, all the outputs are programmed to Momentary Action, minimum pulse duration. Please switch off the track voltage and remove the wire connecting the + terminal of output 1 with the terminal.

The allocation of the memory locations
Location used for allowed values
1 address 1-256
2 reserved for future use 0
3 mode for output 1 1-33
4 mode for output 2 1-33
5 mode for output 3 1-33
6 mode for output 4 1-33

Table 1: Memory allocation

value mode
1-15 Momentary Output, retriggerable
16-30 Momentary Output, not retriggerable
32 Continuous Output
33 Flashing

Table 2: Output modes.

Different values than the ones shown are not allowed and lead to spurious results.

The pulse duration is determined by the following values:




(not retriggerable)

pulse duration


1 17 0.1
2 18 0.2
3 19 0.3
4 20 0.4
5 21 0.5
6 22 0.6
7 23 0.8
8 24 1
9 25 2
10 26 3
11 27 4
12 28 5
13 29 7.5
14 30 10
15 31 12

Table 3: Programming the pulse duration.

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Connecting the LS100/LS110 to the Programming Output of the Command Station

Figure 6: Connecting the LS100/LS110 to the Programming Output of the LZ100

Programming the turnout addresses

Programming the Output Mode

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