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DH83FX Right Rail (Engineer's Side)
Left Rail (Fireman's Side)
Motor -

Motor +
Red
Yellow
Blue
Green
White
Orange
Gray
Forward Light
Reverse Light
Light Common
Function 1
Function 2
Violet
DH83/FX
2 Amp
Decoder
Right Side
(Engineer's)
Power Pickup
Left Side
(Fireman's)
Power Pick-up
DC BRUSH
MOTOR
(BRUSHES
ISOLATED)
Black
Function
Controlled
Device
-
+
Note 2
Note 1
Forward
Lamp
Reverse
Lamp
Lamp Return Line
Decoder Installation Wiring Diagram
DH83 & DH83FX
Function 3
Brown
Notes:
1. Light Common is the positive lead for "full wave" function power operation. Do not exceed the 200ma
rating of the function outputs. If Light Common is not used, power the lamp or function from either track
power pick-up for "half-wave" operation by connecting the Lamp Return Line to either track pickup.
2. If you use an inductive(coil) type load, you should place an inductive kick-back suppression diode
across the coil with the cathode(banded) end connected to the Light Common side. A small signal diode
such as IN4148 or rectifier such as IN4001 is ideal. Be careful because an incorrectly connected diode
can damage the function output.
3. See the Decoder Users Manual for full details of wiring 12-16V lamps, 1.5V lamps, & LED's for full and
half wave operation. Lamps that draw more than 80ma when running require a 22 ohm 1/4 watt resistor
in series with the directional light function lead to protect the decoder.
See Digitrax Decoder Users Manual for complete decoder test procedures,
installation instructions and technical information. This manual is available
at no charge from your dealer. If your dealer is out of these manuals, call
Digitrax at (770) 441-7992 and we will gladly send you a copy.
Damaged decoders should be returned directly to Digitrax for repair.
The standard repair charge is $17.
WARNING:
To prevent decoder damage, be sure the
motor brushes are properly isolated
before applying power!
Lamp
connections
shown for
12-16V bulbs
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DH83FX
2 Amp Digital Command Control Mobile Decoder
THE
WAVE
OF
THE
FUTURE
DIGITAL COMMAND CONTROL
P.O. BOX 1424 NORCROSS, GA USA 30091
(770)441-7992 FAX (770)441-0759
2.0 Amp (4.0 Amp Peak) Mobile DCC Decoder
Compatible with the baseline NMRA DCC Standard
Supports Both Short (127) & Long (10,000) Address Modes
User Programmable Address, Acceleration, Deceleration,
Start-voltage & Mid-point voltage and more
Programmable from DCC compatible equipment without opening the loco
Smooth conversion to analog operation with functions operational
4 User Configurable, Independent Function Leads Rated at 200ma
Use These as Regular Function Leads or Generate Special Lighting Effects
Choose from Mars, Gyralite, Single or Double Strobe, Ditch Lights
Rotary Beacon, Random Flicker, Rule 17 and more!
1 Additional Regular Function Lead Rated at 200 ma

Smooth locomotive speed control with user selectable
14, 28, or 128 forward & reverse speed step capabilities
User loadable speed tables for customized speed control
with 128 speed step resolution
Supports Basic, Advanced & UniVersal Consisting
User configurable loco direction of travel, you decide
which way is forward without rewiring the motor!
Heavy duty motor drive output. Active short circuit protection
Automatic thermal overload shutdown
Complies with FCC Part 15, class B RFI requirements
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