The Technology Of The Esu Model; Possible Operating Modes Of The Class 66/77; Analogue Mode; Digital Mode - Esu Class 66 Instruction Manual

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Technical functions

4. The technology of the ESU model

The new LokSound V4.0 M4 decoder is a central
part of your new class 66/77. Its circuitry is responsi-
ble for design and control of all running and sound
functions of the class 66/77:
Driving forward and in reverse
Lighting functions
Sound functions
Smoke generator
Besides M4 the LokSound V4.0 M4 also supports
DCC with RailComPlus, Motorola® and Selectrix®
and also be operated on analogue layouts. Pro-
gramming can be done either with DCC command
stations or with Märklin® central units, etc. the de-
coder automatically detects the mode of operation;
therefore you do not have to set anything in this
regard.
In case you wish to change any of the default set-
tings of the locomotive (such as the address or the
sound volume) we recommend to first reading
chapter 5. This chapter lists all parameters of the
LokSound V4.0 M4 decoder and how to change
them with the various command stations available
on the market.

4.1. Possible operating modes of the class 66/77

4.1.1. Analogue mode

The class 66/77 may also be operated on conven-
tional (=analogue) DC or AC model train layouts.
The number of available functions is, however, qui-
te limited:
Driving forward and backwards
Directional lighting
Engine sounds (automatic)
The smoke generator cannot be turned on in ana-
logue mode. The engine sound sets in at about
6.5 V track voltage. At 8.5 V the locomotive slow-
ly starts moving. Both DC transformers (throttles,
e.g.: ROCO®) and AC transformers (e.g.: Märklin®,
Titan) are suitable for analogue operation. Please
note, that due to the large number of different sys-
tems on the market you may not achieve trouble-
free operation with electronic throttles employing
PWM (pulse width modulation).
8
Attention: the class 66/77 must have come to a
complete standstill before you activate the change-
of-direction command! Never switch to the opposi-
te direction while the locomotive is moving.

4.1.2. Digital mode

For prototypical operation we recommend using
a digital command control system. The numerous
functions are only available in digital mode.
The default address (ex works) is "03" (DCC and
Märklin® Motorola®)
14 speed steps with Märklin® Motorola®.
In DCC mode the decoder automatically detects the
speed steps set in the command station.

4.1.2.1. Digital operation with DCC systems

The class 66/77 can be operated with any DCC
compliant system. Sounds and other functions of
the class 66/77 can be triggered with the function
buttons F0 through F21.
Function mapping (ex works):
Functionmapping:
Function
Button
F0
Directional lighting
F1
Engine sound
F2
Horn (high)
F3
Smoke generator
F4
Cab lighting
F5
Headlights off at cab 1
F6
Headlights off at cab 2
F7
Headlights as per lighting rules in BE/FR (Third headlight off)
F8
shunting lights DE/FR/BE
F9
Horn (low)
F10
Emergency stop
F11
Platform announcement
F12
Turnout sensor off
F13
Coupler sound
F14
Illuminated driver's cab-control panel
F15
Shunting lights as per NL
F16
Air compressor / exterior lights as per CNet,TGOJ, CLF
F17
Station announcement
F18
Short horn (high)
F19
Short horn (low)
F20
Sanding
F21
Shunting mode

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This manual is also suitable for:

Class 77

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