Loco-Decoder 75 400
Digital Decoder for DC-Motors
for the Märklin-Motorola Format
Suitable for dc-locos by Bemo, Brawa (Life-Like), Fleischmann, Gützold, Lili ut, Lima, Piko,
Märklin-Hamo, Rivarossi (Atlas), Roco, Trix. Not suited for coreless instrument motors!
Properties
Locos with dc motors can be o erated digitally by using the 75 400 decoder. This decoder
o erates on both the old and the new extended Motorola data formats. It features two direction-
de endent lam out uts that are controlled by the function/off keys and an alternate address.
Uhlenbrock decoders can be rogrammed 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 arameters set by the user. These,
as well as s eed and direction settings, are ermanently stored. This means that a loco will retain
its settings and will continue to o erate as before after the track ower has been reestablished.
Therefore, a loco can be run in standard automatic block systems.
When crossing over into an analog owered section, it will retain its s eed and direction settings
rovided the track voltage is high enough. Changing of direction or s eed is not ossible though.
Analog Operation
In analog mode the decoder acts like a standard reverser. Loco will sto when entering a digital
section.
Setting the Operation Mode
Switching over from digital to analog mode is done as described in the rogramming instructions.
A value of 01, analog code, is assigned to rogramming modes function 08 . Factory set code
value is 02 for digital o eration.
Im ortant: The state of the lam s set in digital mode will be retained in analog mode, i. e. when
lam s should light in analog mode, they must have been switched on in digital mode.
A decoder can be set back to digital when in analog mode, by holding the transformers control
knob in overvoltage osition for at least 16secs.
Momentum Control
Use f4 to switch momentum on or off.
Im ortant: Di 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 com atible to Märklins accelerating/decelerating circuit for their C90 decoder.
This circuit was ublished in Märklin-Magazin 4/93 and 5/93.
Technical Data
Max. motor current: 0.7 am , 1.0 am with heatsink
Motor surge current: 2.0 am s
Ancillary out uts: 2 x 0.9 am
Total load: max. 1.0 am
Size: 19 x 16 x 5 mm (3/4" x 5/8" x 3/16")
Address range: 1- 255, accessible by Intellibox
1- 80, when em loying another central unit
The decoder is factory reset to address 01 and digital o eration.
