Diagram 1B
Diagram 5
Diagram 2
Diagram 3
Diagram 4
It is always better to power your accessories with an external power
supply so your DCC system utilizes its full power to run your trains.
This decoder also rectifies the AC power, so accessories requiring DC
current, such as slo-motion DC switch machines or LEDs, do not need a
separate DC power supply.
Hookup from your DCC system to decoder
There are 4 input terminals on the decoder board (see Diagram 1A).
1. If you do not want the DCC signal to power any accessories, run 2 wires
between your DCC unit or your track rails closest to the decoder, and the
lower 2 input terminals marked “DCC Track” (see Diagram 1A). Then
using an external 12-vac power supply, connect its 2 output wires to the
upper 2 input terminals marked “12-vac.”
The quantity and type of accessories will determine the requirements
of your 12-volt power supply.
2. If you want the DCC signal to power your accessories, run 2 wires
between your DCC unit or your track rails closest to the decoder, and
the lower 2 input terminals, and then jump them from the two lower
input terminals to the upper two input terminals (see Diagram 1B).
Remember, if you use this method to power your accessories, you
will have less power to operate your trains. (Diagram 1B)
Hooking up your accessory decoder to twin coil (AC) switch
machines
Your accessory decoder comes from the factory pre-programmed to
operate in latching mode, “Constant On.” However, twin coil switch
machines use a momentary pulse to activate them.
If left in the “Constant On” output, the decoder will burn out the switch
machines. Please reprogram the accessory decoder to operate the twin-
coil switch machines prior to hooking them up to the accessory decoder.
See section on programming the decoder.
If you are going to use the accessory decoder solely for twin-coil switch
machines, cutting the red wire will automatically set the decoder for use
of this type of switch machine. All you need to program is its program
address. See section on programming and Diagram 2. Twin-coil switch
machine has three terminals or wires. Usually the middle one is com-
mon. Make sure the common wire is connected to the Com terminal.
Hooking up your accessory decoder to a slo-motion switch machine
(DC) or signal LEDs (DC)
Your accessory decoder rectifies the AC input so an auxiliary DC power
supply is not needed, just an AC power supply can be used for DC
accessories. Follow Diagram 3 for each pair of the four outputs (A-B-C-D).
The decoder is shipped with four pieces of 300-ohm resistors for use
with slo-motion switch machines or signal LEDs.
Hooking up LEDs only
Use the supplied resistors to hook up
signal LEDs to the four pairs of
outputs (A-B-C-D) of your accessory
decoders.
Using LEDs and slo-motion switch machine from same decoder
pairs of output (A-B-C-D) (Diagram 5)
Programming the decoder
This decoder has the following CVs:
CV513 – main address that is a 2 digit (1-127) address
CV515 – The output mode of Pair A (subdecoder A)
CV516 – The output mode of Pair B (subdecoder B)
CV517 – The output mode of Pair C (subdecoder C)
CV518 – The output mode of Pair D (subdecoder D)
If your DCC system cannot program CV513 to CV518, you can use
CV1 to CV6 to program the decoder on the program track. The CV
mapping follows:
CV1 = CV513 = main address
CV3 = CV515 = pair A output mode
CV4 = CV516 = pair B output mode
CV5 = CV517 = pair C output mode
CV6 = CV518 = pair D output mode
Programming
During the programming mode, you cannot program reverse polarity
into the accessory decoder. You can only reverse the polarity of a
specific output when you program a route for your accessory
decoders on your DCC system.
Programming address CV513:
The main address can only be programmed on the program track.
This main address, once programmed, automatically assigns the
four outputs their sub-addresses, so you need only to program one
address to the decoder. Your decoder’s main address is pre-
programmed to #1 at the factory. So the sub-addresses are 1, 2, 3
and 4.
A
D
B
C
From DCC track
Red wire
A
D
B
C
Red wire
LED1
LED2
A
D
B
C
Red wire
Slo-motion
switch machine
M
LED1
LED2
A
D
B
C
Red wire
Slo-motion
switch machine
M
A
D
B
C
From DCC track
Red wire
From 12V power supply
Cut this red wire if
the decoder is used
only for twin coil
switch machine
From DCC track
From 12V power supply
From DCC track
From 12V power supply
From DCC track
From 12V power supply
