NCE EB1 User Manual - page 2
Description:
It is usually desirable to divide a layout into separate track power sections (power districts).
Multiple
EB1
circuit breakers can be used to divide the power output of one DCC booster into
independent power districts each with its own short circuit protection. No
te: The
EB1
is
designed to be used only with DCC systems. It will not work with a
ny power system other
than DCC.
Mechanical I
nstallation:
The
EB1
has 4 mounting holes that can be use
d to mount it to a convenient place on your
layout. We recommend using #4 x 3/4” round head wood screws with #4 flat washers. Do
not over tighten the screws. Lightly snug the screws up just enough to keep the circuit board
in place without bending it. Bending the circuit board can fracture the fragile ceramic
electr
onic components.
Electrical Connections:
The diagram below illustrates the wiring of the
EB1
to your layout. T
he terminal strips on the
EB1
accept up to #12
AWG
wire. For distances to 20 feet (6.5 meters) from the booster to
the
EB1
you should use at least #
16
AWG
wire, #14 for runs out to 40 feet and #12 for longer
runs. Wiring from the
EB1
to the track should be the same gauge for runs of the same
distance. We recommend track feeder wires every 8-10 feet when using code 83 or larger
rail size. If you
’ re using code 70 or smaller rail we suggest feeders every 6 feet. Insufficient
feeders can cause enough voltage drop to prevent the circuit breaker from working. The
drawing below shows booster (DCC power) and track connections as well as hookups for
optional manual reset and a remote status LED.
Note: The screw terminals marked with black dots (drawing above) are directly connected
together on the
EB1
circuit board. If you are using common rail make sure the terminals
marked in black above are connected to the common rail (left rail in the diagram)
. When the
EB1
“trips” only the screw terminals marked with an X are disconnected during a short circuit.
When the power and track connections are made the
EB1
is ready to use. F
actory settings
have been chosen to provide suitable operation with most HO and N scale layouts. If desired
you can fine tune the operating parameters of the
EB1
to more closely match your DCC
system and layout using the information presented on the following pages. Before jumping in
and changing any settings we suggest trying the
EB1
with the or
iginal factory settings.
**Last revised:
5 February 2008
Page 2
EB
1
TRACK
LED
DCC
PO
W
ER
A
B
C
EB1
X
X
SETUP
JUMPER
MANU
AL
RESET
(o
pt
i
o
n
a
l)
1
2
3
4
REMOTE
LED
(
op
ti
o
n
a
l)
Jump
ers
to
set
tri
p
curr
ent
Must
b
e
m
o
m
e
nt
ar
y
push
but
t
o
n
ty
p
e
switch
STATUS