Loco-Decoder 74 420
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:
0.8 amp
Motor peak current:
2.0 amps
Auxiliary outputs:
2 x 0.9 amp
Total load:
0.9 amp
Size:
19 x 16 x 5 mm (3/4" x 5/8" x 3/16")
Address range:
1- 9999
The decoder is factory preset to address 3, 14 speed steps and automatic recognition of a dc
power supply.
