Inc Sound Module Decoder - Manual

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3.3.4.2 Digitrax 9 Pin HO & 8 Pin N Decoder Interfaces

Some Digitrax HO & N scale decoders come with a plug and socket on the

decoder so that the wire harness can be unplugged from the decoder. This inter-

face lets you share one or more decoders among multiple locomotives wired

with the corresponding harnesses and lets you use dummy plugs for operation

on DC.

Wire Harnesses: DHWH (9 pin for HO) and DNWH (8 pin for N) have a

plug that attaches to your decoder and wires that are soldered to the motor,

brushes and functions on your locomotive during installation. The HO wire

harnesses also come in both short and long versions with a plug on one end and

DCC medium plug on the other end. The N scale version comes in the short

version only with the DCC medium plug.

Dummy Plugs: DHDP (HO) and DNDP (N) are available for DC operation

of harnessed locomotives (without decoders). When you install a wire harness

in your locomotive and plug a dummy plug into it, your loco will operate on

any analog control system and will run on DCC as an analog loco. When you

remove the dummy plug and plug in a decoder, the loco will run on DCC.

To separate a Digitrax decoder from the Wire Harness:

Firmly hold all harness wires between thumb and forefinger approximately

5/8” back from the plug. Grasp the decoder body on the sides right next to the

socket to ensure no stresses are placed on components under the protective

sleeve. Pull gently and evenly on all wires simultaneously. Distribute the force

needed to separate the plug and socket EVENLY over all the wires to prevent

damage to the plug.

3.3.4.3 Installing Decoders with Wires

In some cases, especially in older locomotives,

brass locomotives and really tiny locomotives,

there is no special harness arrangement, plug ‘n

play installation or board replacement option

available. In these cases, the decoder wires are

soldered into the locomotive.