Uhlenbrock Elektronik 74 400 User Manual

Loco-Decoder 74 400
Digital decoder for dc-motors
for DCC-format
Suitable for dc-locos by Bemo, Brawa (Life-Like), Fleischmann, Gützold, Liliput, Lima, Piko,
Märklin-Hamo, Rivarossi (Atlas), Roco, Trix. Not suited for coreless instrument motors!

Specifications

These are specifications of the loco-decoder 74 400:
• can drive all dc motors (excluding coreless motors)
• can be used on all DCC-conforming layouts
• short (1-127) as well as long (128-9999) address
• 14, 27, 28 and 128 speed levels
• automatic conversion to analog operation
• supports all programming algorithms defined by the NMRA
• NMRA/DCC conformant
• 2 direction dependent function outputs, to be controlled through one of these keys of the
Command Station: „function“ and „off“, „FL“, „F0“, „light“
• shunting speed (half speed) can be enabled through function „F3“
• acceleration and deceleration delay can be turned off or on through function „F4“
• accepts the „DCC brake“ signal generated by some „DCC brake units“
(like, e.g., the Uhlenbrock Power-3 Booster)
Analog mode fuatures
The decoder can be used with an analog throttle on an analog layout. The dc power supply is
automatically recognised by the decoder – as long as Bit #2 of CV #29 is set to the value 1.
In analog mode the two function outputs are always on and they change according to the loco
driving direction (track polarity).

Technical Data

Max. motor current:
Motor peak current:
Auxiliary outputs:
Total load:
Size:
Address range:
The decoder is factory preset to address 3, 14 speed steps and automatic recognition of a dc
power supply.
0.8 amp
2.0 amps
2 x 0.9 amp
0.9 amp
19 x 16 x 5 mm (3/4" x 5/8" x 3/16")
1- 9999