Loco-Decoder 75 100
Digital Decoder for wire-wound Motors
for the Märklin-Motorola Format
For Märklin or HAG locos.
Properties
Locos by Märklin or HAG can be operated digitally by using the 75 100 decoder. This decoder
operates on both the old and the new extended Motorola data formats. It features two direction-
dependent lamp outputs that are controlled by the function/off-keys, two additional ancillary
decoder outputs, and an alternate address.
Uhlenbrock decoders can be programmed by Intellibox or Märklin Control 80f. Decoder address,
acceleration/braking rates, as well as starting and maximal motor voltage can be set and altered
at every time.
Digital Operation
When running in digital mode, the loco works according to the parameters set by the user. These,
as well as speed and direction settings, are permanently stored. This means that a loco will retain
its settings and will continue to operate as before after the track power has been reestablished.
Therefore, a loco can be run in standard automatic block systems.
When crossing over into an analog powered section, it will retain its speed and direction settings
provided the track voltage is high enough. Changing of direction or speed is not possible though.
Analog Operation
In analog mode the decoder acts like a standard reverser or if selected as reverser for engines
with a telex coupler. Loco will stop when entering a digital section.
Setting the Operation Mode
A decoder can be set back to digital when in analog mode and vice versa, by putting it on an analog
track section and holding the transformers control knob in overvoltage position for at least
16 secs. A headlight will flash after changeover.
Switching over from digital to analog mode is done as described in the programming instructions.
A value of 01, analog code, is assigned to programming modes function 08. Factory set code
value is 02 for digital operation.
Important: Lamp state set in digital mode will be retained in analog mode, i. e. when lamps should
light in analog mode, they must have been switched on in digital mode.
Momentum Control
Use f4 to switch momentum on or off. Important: Dip switch #2 on back of Märklin Control Unit
6021 must be set to ON in order to transmit the new Motorola format.
Compatibility
The decoder is compatible to Märklins accelerating/decelerating circuit for their C90 decoder.
This circuit was published in Märklin-Magazin 4/93 and 5/93.
Technical Data
Max. motor current:
1.0 amp
Max. surge:
2.0 amp
Ancillary outputs:
4 x 1.0 amp
Total load:
max. 1.2 amp
Size:
26,5 x 15 x 5 mm (1 1/16 x 19/32 x 3/16)
Address range:
1-255, accessible by Intellibox
1-80, when employing another central unit
Factory set default values are: Extended Motorola format, address 01, and digital mode.
