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DN122K2 N-scale Drop-In Locomotive Decoder
DCC Compatibility
 
 

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QSI QARC (Quantum Analog Remote Control) Warning
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RWB Line

DN122K2/
D-DN122K2

Click here to download the User Manual.
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3-Piece Decoder Connected by Wires

Fits These Locomotives:
  • Kato RDC
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DN122K2 Features:
Amperage: 1-amp continuous, 1.25 amps stall, 1.5 amps peak
Two- and Four-Digit Addressing
Speed Steps: 14, 28, and 128
V-Start, V-Mid, and V-Max in All speed-step modes
Momentum: Acceleration and Deceleration
Base-Direction Programming
User Identifiers
User-Loadable Speed Table
Decoder-Assisted Consisting
DC Analog Conversion
DC Function Control
Two 125 mA Functions
Full-Wave (Blue Common) Wiring
Directional/Non-Directional Lighting
FX Lighting:
Random flicker (for steam fire-boxes)
Mars light
Flashing Headlight
Single-pulse strobe
Double-pulse strobe
Rotary beacon
Gyralite
Rule 17 Dimmable headlight (dims when Function 4 is turned on or loco direction is opposite)
FRED
Blinking Ditch Lights (starts blinking when Function 2 [the horn button] is pressed). See Note below.

Service-Mode Programming, all forms
OPS-Mode Programming
Short-Circuit Protection
Thermal Protection
Back-EMF Control
Transponding

Note: While this decoder offers Blinking Ditch Lights, they do not blink back and forth in perfect harmony. Because the decoder processor is so busy with speed control, Back-EMF, and Transponding all taking processor time all the time, there isn't enough processor time left to keep the ditch lights blinking perfectly.

DN122K2 Decoders Do Not Have:
JST Connector Harness System (it's irrelevant for a drop-in decoder)
Quiet Drive
Forward and Reverse Trim for the User-Loadable Speed Table; it's implemented, but it's flawed
Kick Start for the User-Loadable Speed Table; they're supposed to have it, but they don't
Function Remapping
CV Reset
DAC Function Control
DAC Momentum Trim
Dither
Properly-Timed Blinking Ditch Lights (FX Feature)
Power-Source Conversion (CV12) - it has automatic analog instead
Packet Time-Out

Refer to the Decoder Feature Index page for information about any decoder feature.
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