Lenz Digital plus LE105XF User manual

Locomotive decoder LE105XF 1
DIGITAL plus
The industry's first truly universal decoder that is at home on all
NMRA DCC systems. The characteristics of the decoder are:
∗Selectable for operation with 14/27, 28/55, 128 direct drive or 128 speed table
mode with precision glide motor control.
∗Four on/off function outputs with a current rating of 100 mA each
∗Headlights can be configured for directional lighting, full Rule 17 lighting, or
lights and F1. Headlights can also be dimmed using an extra function.
∗2 extra functions can be set to blink or configured as ditch lights.
∗Support for Advanced Consist Control and Extended Addressing
∗Operation on conventional DC layouts is possible. This feature may be
disabled.
∗Full Support for operations mode programming (long and short) and full support
for all forms of programming as described in NMRA RP-9.2.3
∗Rich set of properties which the user can set to customize the decoder to a
particular locomotive.
∗Provides 1A continuous motor current: Stall current 4 amps
∗Size L 1.6" x W 0.65" x H 0.12"
L 40mm x W 17mm x H 2.9mm
LE105XF
Universal DCC Decoder
Art. No. 10118
Version 4.5
Revised 2/00

2Locomotive decoder LE105XF
DIGITAL plus
The LE105XF Universal Decoder
The LE105XF represents a whole new concept to the evolution of
DCC. Not only is the LE105XF designed to use with our own
DIGITAL plus system, it is also designed to be at home on all the
other popular NMRA DCC systems. To accomplish this we first
designed a decoder to be in full conformance to the NMRA
Standards and RPs and then augmented the decoder to work well
with all other major systems on the market.
Although the LE105XF has a low price, it is packed with all the
features you expect in a high end decoder. Independent or
directional lighting (that can be dimmed using a function), full ditch
light operation or 2 extra functions, advanced consist control,
extended addressing, operations mode programming and full
support for all the various speed step modes including 128 step
motor control, are but a few examples of the advanced features
found in the LE105XF.
The NMRA awards its prestigious C&I label to products it has
tested and found to be in full compliance with all NMRA DCC
Standards, Recommended Practices and industry norms. The
LE105XF decoder has been awarded NMRA C&I warrant #99-14.
Many characteristics of the LE105XF decoder can be
programmed to customize the decoder to its locomotive. Please
read “The Configuration Variables and Their Meanings” section
later in this booklet for details on the configuration variables
supported by the LE105XF. The LE105XF supports all forms of
programming described in NMRA Recommended Practice 9.2.3
including the user friendly direct CV programming mode and the
operations mode programming so that you can adjust values while
the locomotive is in use. For example, you can operate the
decoder with the factory pre-set speed table or generate your own.
You can set which end of the locomotive is the forward end. You
can even decide whether or not you want to be able to operate on
conventional DC layouts.

Locomotive decoder LE105XF 3
DIGITAL plus
Preparing to Install the LE105XF
The locomotive should be operating well on normal DC power
before installing the decoder. Replace worn out motor brushes
and burned out light bulbs. Clean any dirt or oxidation from the
wheels and pickups, and make sure that electrical contact is
smooth. Now is also a good time to lubricate your locomotive. A
locomotive that runs well under DC will run exceptionally well
under DCC.
The LE105XF is very thin and will fit into most HO locomotives
even those with narrow hoods.
Some advice on the current draw of the decoder
output:
The current for all the decoder outputs is supplied by an internal
rectifier with a maximum current rating of 1.2 Amps. The sum of
all currents to the motor and the function outputs cannot exceed
this limit. Each individual output can only draw up to its limit.
Example:
Suppose the motor may require as much as 1.0 A continuously.
Then the function outputs combined must not exceed 0.2 A. If the
directional headlights require 50 mA each, then the load on
function 1 and 2 must not exceed 150 mA.
Some advice on installing the decoder:
Although the LE105XF has many internal safeguards to prevent
damage, you must not allow any metal part of the locomotive to
touch the surface components of the decoder. This could cause a
direct internal short circuit and the decoder will be destroyed. The
motor brushes MUST also be completely isolated from the
rail pickup. Achieving isolation may require some different
approaches on different locomotives, perhaps unsoldering wires,
placing a thin piece of insulating plastic between brush terminal
and contact spring. If you have a VOM, check for infinite
resistance between the motor and all the wheels. Take special
note that metal contact might occur only when the loco body is
reinstalled.
DO NOT WRAP decoder with electrical tape or shrink wrap!

4Locomotive decoder LE105XF
DIGITAL plus
Doing so will impede air circulation and degrade the performance
of the decoder. Instead, put electrician tape over any part of the
locomotive frame or body that might touch the decoder and use
double sided foam mounting tape to mount the decoder. This will
prevent short circuits without 'suffocating' the decoder.
The LE105XF can not be set up for simultaneous use for 2-rail
pickup and overhead cantenary or trolley operation. If the
locomotive is turned the wrong way, the decoder could get twice
the track voltage which would destroy it!
Wiring Options
There are two wiring options for installing the LE105XF,
depending on how the locomotive is constructed. The four
functions could be connected with their common to the track
voltage as shown in Figure 1, or, use the decoders floating
common as shown in Figure 2. A mixture of both options is also
possible. If the bulbs for the headlights are floating (isolated
against wheel pick up and chassis) and connected according to
Figure 2, they will shine brighter compared to the option shown to
Figure 1. Furthermore, the directional headlights will function while
operating on conventional DC layouts.
Step by Step Installation
Two wires connect the decoder to the motor. Make sure that the
motor is electrically isolated from both track pickups:
•Orange wire to the motor terminal that was
previously connected to the right rail (Pin #1).
•
Gray wire to the motor terminal that was
previously connected to the left rail (Pin #5).
Two wires connect the decoder to the track electrical pickups:
•Red wire to right rail pickup (Pin #8).
•Black wire to the left rail pickup (Pin #4).
Five wires connect the headlights and functions to the decoder:
•White wire (Pin #6) to the forward headlight or the function
controlled by Output A. If the bulb is isolated, connect the blue
wire (Pin #7) to the other terminal.
•Yellow wire (Pin #2) to the rear headlight or the function
controlled by Output B. If the bulb or function is isolated, then
connect the blue wire (Pin #7) to the other terminal.

Locomotive decoder LE105XF 5
DIGITAL plus
•Green wire (Pin #3) to function controlled by Output C. If the
bulb is isolated, connect the blue wire (Pin #7) to the other
terminal.
•Violet wire to function controlled by Output D. If the bulb is
isolated, connect the blue wire (Pin #7) to the other terminal.
Figure 1: Wiring the LE105XF using
track voltage common Figure 2: Wiring the LE105XF using a floating common.
Place the locomotive (without the body) on the programming track
and read back the locomotive's address from the decoder. If the
decoder is properly installed, you will be able to read back the
factory pre-set address 03. Remove the locomotive from the
track, and if necessary correct any wiring errors.
Special lighting examples
Following are but a few examples of popular special effects.
Please refer to the complete CV definitions for complete
explanations of CV values.
Example 1: Non directional dimmable front headlight,
independent rear light and ditch lights.
Connect the white wire to the front headlight, the yellow wire to the
rear headlight the green wire to one ditch light and the violet wire
to the other ditch light. F0 turns on front light; F4 dims the front
headlight if F0 is on; F1 turns on rear light; F3 turns on the ditch
lights; and F2 alternatively blinks the two ditch lights if F3 is on.
CV51 = 07, CV52 = 128 (higher value brighter when dimmed)
CV53 = 04, CV54 = 04, CV55 = 04, CV56 = 15 (higher value
slower blinking rate)

6Locomotive decoder LE105XF
DIGITAL plus
Example 2: Directional bright headlight, other headlight
dimmed, one beacon, and one cab light
Connect the white wire to the front headlight, the yellow wire to the
rear headlight, connect a 490 ohm resister between the front and
rear headlights, the green wire to the beacon and the violet wire
connects to the cab light. F0 turns on light in the direction of
travel bright and the other light dim; F1 turns on the beacon; and
F3 turns on the cab light.
CV51 = 00, CV53 = 01, CV54 = 01, CV55 = 04, CV56 = 15
Example 3: Mars light and two functions
Connect the white wire and green wires to the front headlight, the
yellow wire and violet wire connect to two other functions of your
choice. F0 turns on front light; F4 converts the front headlight to a
mars headlight if F0 is on; and F1 and F8 can be used for two
other functions of your choice.
CV51= 07, CV52= 75, CV53= 01, CV54= 10, CV55= 128, CV56= 23
Programming the locomotive decoder LE105XF
Any NMRA DCC programmer can be used to configure the
locomotive decoder LE105XF. With several entry level systems
only a few CVs (such as CV #1, the locomotive address) can be
set unless you use a separate programmer. The LE105XF
supports all modes and can be programmed by all NMRA DCC
programmers. Specific details for reading and writing the
decoder’s configuration variables can be found in the manuals of
the appropriate equipment.
The configuration variables and their meaning
The following table lists the various CVs supported in the
LE105XF decoder. Both the New CV numbers and the older
Register numbers are provided for cross reference.
Please note: Some CVs (such as CV29) have specific meanings
for each bit. The bit assignments in this table use a bit numbering
scheme of 0-7 to correspond the NMRA convention for universal
bit numbering. DIGITAL plus LH100 and LH200 handhelds use a

Locomotive decoder LE105XF 7
DIGITAL plus
scheme of 1-8 to refer to the individual bits rather than 0-7. (Bit 0
in this table is displayed as a"1" on LH100 handheld, Bit 1 is
identified as "2"...)The bit numbers in () within these tables
contain the LH100 and LH200 bit numbers.
Table 1: LE105XF Configuration Variables
CV R
e
g
Description Range Factory
setting
1 1 Locomotive address:
This is the number with which you select a
locomotive in the DIGITAL plus system.
Setting the address from #1 to #3 using register
mode will reset the decoder to utilize 14 speed
step operation.
1-127 3
2 2 Start voltage:
This is the voltage applied to the motor in speed
step 1. Set this value so that the locomotive just
starts moving in speed step 1.
0-31 8
3 3 Acceleration Momentum:
Determines the rate of change of speed upon
acceleration. A higher value leads to a slower
acceleration.
1-31 1
4 4 Brake Momentum:
Determines the rate of change of speed upon
braking. A higher value leads to longer brake
distance.
1-31 1
-5Contains CV29 (see CV29 below) 0-55 6
-6Page Register:
Normally this CV is not modified directly by a
user. For correct operation, this CV should be
set to have a value of 1 after any use.
0-127 1
7 7 Version Number:
This location stores the version number of the
decoder. This location is read only.
-45
8 8 Manufacturers Identification / Factory reset
This value is the manufacturer ID of the decoder,
(Lenz =99). Writing a value of 33 using Register
mode resets all CVs to their factory condition
-99
17 -Extended Address High Byte 192-
231 0
18 -Extended Address Low Byte
The two byte address if used is contained in
CV17+18
0-255 0
**Note: in the factory setting field the numbers in the [ ] are decimal.

8Locomotive decoder LE105XF
DIGITAL plus
CV Description Range Setting
19 Consist Address
The advanced consist address if used is stored in
CV19
0-255 0
23 Acceleration Trim This Configuration Variable
contains additional acceleration rate information that
is to be added to or subtracted from the base value
contained in CV3
0-255 255
24 Deceleration Trim This Configuration Variable
contains additional braking rate information that is to
be added to or subtracted from the base value
contained in CV4
0-255 255
29 Decoder Configuration, Byte 1:
Several decoder properties are set with this byte.
Changes are easiest if done in binary mode, but can
also be done by adding the decimal () for all the
features desired together and writing the total into
CV29. The detailed properties are:
0-55 6
bit 0
(1)
locomotive direction:
Locomotive’s relative direction: This bit sets
the direction the locomotive will move when
told to move forward in digital mode.
0 = locomotive’s direction is normal
1 = locomotive’s direction is inverted
0,1 0
[1]
bit 1
(2)
Headlight mode:
0 = Operation with 14 or 27 speed step
systems. This setting is selected when the
locomotive decoder is used with any Digital
system that does not support 28 speed step
mode. If the headlights turn on and off as the
speed is increased, the command station is
configured for 28 speed step mode, and the
decoder is in 14 speed step mode.
1 = Operation with 28, 55 or 128 speed steps.
If you use this setting, the Command Station
must also be configured to use 28 speed step
mode or 128 speed step mode for the
decoder's address, otherwise the headlights
can not be controlled.
0,1 1
[2]
bit 2
(3)
Usage on conventional DC layouts:
0 = locomotive operates in digital mode only
1 = locomotive can operate on either
conventional DC and on DCC
0,1 1
[4]
bit 3 always 0 0 0

Locomotive decoder LE105XF 9
DIGITAL plus
CV Description Range Setting
29 bit 4
(5)
Speed Curve Selection:
0 = factory pre-set speed curve is used
1 = user defined speed curve is used. Please
enter the appropriate values into CV 67 to 94
before setting this bit.
0,1 0
[16]
bit 5
(6) Extended Addressing: 0= Normal addressing
1=Two Byte extended addressing
0-1 0
[32]
bit 6
bit 7 always 0 0 0
50 Decoder Configuration, byte 2:
Similar to CV 29, but used to set other properties 0
bit 0 not used
bit 1
[2] 0 = CV23 and CV24 are not active 1 = CV23/CV24 are active and contain the
acceleration and deceleration trim values
that are added to CV3 or CV4.
0,1 0
[2]
bit 2
[3]
Brake momentum on DC operation.
Used to achieve prototypical braking at red
signal indications if conventional DC control
CV29.2 is disabled. (CV 29 bit 2 = 0)
0 = locomotive proceeds with track voltage
dependent speed inside the conventional DC
section.
1 = locomotive brakes in the conventional
DC section with pre set brake momentum.
0,1 0
(4)
bits 3-
7not used
51 Lighting Special Effects for Outputs A and B 0
bit 0
(1)
0 = the headlights are directional.
1 = the lights are independent per Rule 17.
F0 controls the front headlight and F1 the
rear headlight or a separate function.
0,1 0
[1]
bit 1
(2) 0 = function dimming disabled
1 = the value in CV52 is used for
headlight/function dimming. If CV51.0 = 0
then F1 dims the headlight if on.
0,1 0
[2]
bit 2
(3) 1= if CV51.0 and CV51.2 both =1 (dimming
and Rule17 are both active), F4 dims F0 0,1 0
[4]
bit 3
(4) 1= if CV51.0 and CV51.2 both =1 (dimming
and Rule 17 are both active), F4 dims F1 0,1 0
[8]
bits 4-
7Not used
52 Dimming CV - contains the value used for dimming.
0 is dark 255 is max brightness 0-255 64

10 Locomotive decoder LE105XF
DIGITAL plus
CV Description Range Setting
53 Lighting Special Effects for Outputs C and D 0
bit 0
(1) 1 = Output C blinks with the frequency set in
CV56 0,1 0
[1]
bit 1
(2) 1 = Output D blinks with the frequency set in
CV56 0,1 0
[2]
bit 2
(3) 1= Outputs C and D act as Ditch Lights. F2
controls alternate blinking when Output C is
on. CV 54 and CV55 should be set to have
identical values.
0,1 0
[4]
54 Function assignment for Output C 1
bit 0 (1) 1 = Output C is controlled By F1 0,1 1 [1]
bit 1 (2) 1 = Output C is controlled By F2 0,1 0 [2]
bit 2 (3) 1 = Output C is controlled By F3 0,1 0 [4]
bit 3 (4) 1 = Output C is controlled By F4 0,1 0 [8]
bit 4 (5) 1 = Output C is controlled By F5 0,1 0 [16]
bit 5 (6) 1 = Output C is controlled By F6 0,1 0 [32]
bit 6 (7) 1 = Output C is controlled By F7 0,1 0 [64]
bit 7 (8) 1 = Output C is controlled By F8 0,1 0 [128]
55 Function assignment for Output D 2
bit 0 (1) 1 = Output C is controlled By F1 0,1 1 [1]
bit 1 (2) 1 = Output C is controlled By F2 0,1 0 [2]
bit 2 (3) 1 = Output C is controlled By F3 0,1 0 [4]
bit 3 (4) 1 = Output C is controlled By F4 0,1 0 [8]
bit 4 (5) 1 = Output C is controlled By F5 0,1 0 [16]
bit 5 (6) 1 = Output C is controlled By F6 0,1 0 [32]
bit 6 (7) 1 = Output C is controlled By F7 0,1 0 [64]
bit 7 (8) 1 = Output C is controlled By F8 0,1 0 [128]
56 Blinking Rate for Outputs C and D. Frequency in
Hz = 1/0.016*(1+CV56) 0-255 30
67
to
94`
Values for user defined speed curve:
These registers are used for a user defined speed
curve. The factory setting for these registers is
shown in the following speed curve table. The value
in each CV determines the velocity of the locomotive
for each assigned speed step:
For the 14 speed step mode the odd CVs are used
If you are using 128 speed step mode and you have
activated the user defined speed table, the
intermediate speed steps are calculated by the
decoder.
0-255 Factory
Default
Speed
Curve
105 User Identification #1 0-255 255
106 User Identification #2 0-255 255
128 Decoder Software Version – read only 02

Locomotive decoder LE105XF 11
DIGITAL plus
Creating a Speed Curve
One common feature is to set a specific operating speed curve for
your locomotives. This is usually done to have dissimilar
locomotives have the same performance characteristics or to have
the locomotives perform more prototypically. Start by writing down
how you want to assign the internal speed settings to the speed
steps, for example by making up a table as shown below.
Note: CV2 (Start Voltage) is still used as part of the calculation
even when the decoder is in User Defined Speed Curve mode.
Speed step in
14/27 mode Speed step in 28 mode Default speed setting CV / register
1 1 4 67
2 8 68
2 3 12 69
4 16 70
3 5 20 71
6 24 72
4 7 28 73
8 33 74
5 9 38 75
10 43 76
6 11 48 77
12 53 78
7 13 60 79
14 67 80
8 15 74 81
16 82 82
9 17 90 83
18 98 84
10 19 106 85
20 115 86
11 21 125 87
22 137 88
12 23 152 89
24 178 90
13 25 194 91
26 212 92
14 27 232 93
-28 255 94
In 128 speed step mode the decoder internally averages the
speed table to obtain the correct speed step value.

12 Locomotive decoder LE105XF
DIGITAL plus
Warranty
Lenz GmbH does everything it can do to ensure that its products are free from
defects and will operate for the life of your model railroad equipment. From time to
time even the best engineered products fail either due to a faulty part or from
accidental mistakes in installation. To protect your investment in Digital Plus
products. Lenz GmbH offers a very aggressive 10 year Limited Warranty.
This warranty is not valid if the user has altered, intentionally misused the Digital Plus
product, or removed the product's protection, for example the heat shrink from
decoders and other devices. In this case a service charge will be applied for all
repairs or replacements. Should the user desire to alter a Digital Plus Product, they
should contact Lenz GmbH for prior authorization.
Year One:A full repair or replacement will be provided to the original purchaser for any item
that that has failed due to manufacturer defects or failures caused by accidental user
installation problems. Should the item no longer be produced and the item is not repairable, a
similar item will be substituted at the manufacturers discretion. The user must pay for
shipping to an authorized Lenz GmbH warranty center.
Year 2 and 3:A full replacement for any item will be provided that has failed due to
manufacturer defects. If the failure was caused by accidental user installation or use, a
minimal service charge may be imposed. Should the item no longer be produced and the item
is not repairable, a similar item will be substituted at the manufacturers discretion. The user
must pay shipping to and from the authorized Lenz GmbH warranty center during this portion
of the warranty period.
Year 4-10:A minimal service charge will be placed on each item that has failed due to
manufacturer defects and/or accidental user installation problems. Should the item no longer
be produced and the item is not repairable, a similar item will be substituted at the
manufacturers discretion. The user must pay shipping to and from the authorized Lenz GmbH
warranty center during this portion of the warranty period.
Please contact your dealer or authorized Lenz GmbH warranty center for specific
instructions and current service charges prior to returning any equipment for repair.
Hüttenbergstraße 29
35398 Gießen, Germany
Hotline: [phone]
Fax: [phone]
http://www.lenz.com
Lenz Agency of North America
PO Box 143
Chelmsford, MA 01824
ph: 978 250 1494
fax: 978 455 LENZ
[email protected]
This equipment complies with Part 15 of FCC Rules. Operation is subject
to the following two conditions: (1) this device may not cause
harmful interference, and (2) this device must accept any interference received,
including interference that may cause undesired operation.
Please save this manual for future reference!
© 2000 Lenz GmbH, All Rights Reserved