Train-Tech SC100 Instructions Manual

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SC100 - Auto Controller

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Works with DCC or 12-16v smooth DC

Slides into OO track slots on DCC

Or 2 power wires for DCC or DC

Control 2, 3 or 4 aspect colour signals

Links to others for block signalling

Built in sensor to detect train

SC100 Automatic Signal Controller

Enables standard LED colour light

signals to change automatically

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SC100 Auto Signal Controller

Please read carefully and always connect up with the power switched OFF!

Connecting LED colour light signals to the signal controller

The SC100 has a built-in train sensor and can directly control LED colour light signals automatically.
Although originally designed for OO gauge it can also be used on N, TT and HO gauge layouts.
It is part of the Train-Tech Sensor Signal system and can interconnect with Sensor Signals, but instead of a

built-in signal you can wire to almost any type of LED colour light signal or signal heads on gantries etc.
The drawings below show the wiring for each type of signal and this requires careful soldering using fine
wires to the connection pads (optionally you can fit CON8 SIL sockets - contact Train-Tech for details).

Signals have a common - negative (eg Train-Tech signal kits) or common + positive but the SC100 detects
the polarity as it is switched on and also senses whether there are 2, 3 or 4 aspect LEDs connected.

Note that resistors are built in so you do not need to use additional resistors in series with your LEDs signals.

2 aspect Red-Green Signal

G

R

Common +

Green

Red
Common -

Connect to Common - or + depending on signal

4 aspect Red-Yellow-Green-Yellow

Y

G

3 aspect Red-Yellow-Green Signal

G

Y

Common +

Green
Yello w
Red
Common -

Connect to Common - or + depending on signal

R

Connecting a Feather or Theatre

Signals can also have a Feather or Theatre
route indicator and this can be controlled

by the SC100 using DCC - see
page 6 for details.

Y

R

Common +

Yello w 2
Green
Yello w 1
Red
Common -

Connect to Common - or + depending on signal

Common +
Route

Common -

Use the same - or + common as the main signal

1"

•!Locating the SC100 & signal " " Switch off power first!

Choose an appropriate location for your SC100 and signal. The SC100 and signal is usually
located at the same position on the track because the signal should change just after the train has
passed it, ideally not on a sharp bend because the optical sensor needs to ‘see’ the train above it.
Then you are ready to connect power to the SC100:

• Sliding SC100 into OO track suitable for DCC layouts only

DCC layouts have power on the tracks all of the time and so the SC100 and Sensor Signals can
take their power straight from the track by sliding contact fingers into the slots which some track
has for power clips. Note this is only suitable for some OO track such as Hornby and Bachmann
fixed track and a very good connection must be made at all times for reliable operation. Some
Peco track also has slots but they are wider and will need a little packing to make a solid reliable
connection. If in any doubt we recommend wiring power directly to the SC100 - see below.

To fit SC100 into the track, find the power
clip slots in the track between the rails and
the sleepers and, holding the base,
carefully align and slide the contact fingers

into the slots all the way until they stop ­the sensor should be close to but not
touching the rail!

This may be a tight fit so take great care!

Power indicator LED

Lights red to indicate the SC100 is
powered. Light hole may be blocked
off with blue tack or similar if desired.

Sensor - careful never to let the sensor pins
to touch the rail or SC100 will be damaged!

Power clip slots

provided at regular
intervals on some track types

• Wiring the SC100 suitable for both DC and DCC layouts

If your layout is conventional DC or you have DCC but do not like the slide in fingers or do not
have suitable OO gauge track with power clip slots as above, you can wire your SC100 to the
layout power by cutting off the track fingers and soldering two wires - see below.

Signals can be powered by DCC or smooth DC and require a voltage of 12-16 Volts max and
current of approx 0.05A each (they should not be powered by an AC or unsmoothed DC supply).
Recommended supply for DC use is Gaugemaster Model GMC-WM4 12 V 1.25A Power Supply

Using a sharp pair of wire side cutters or modelling
cutters, carefully trim off the fingers exactly along the

dotted lines marked - - - - - - on the signal circuit
base, taking great care not to touch or damage the

small black sensor or any of its wires as this will
cause permanent damage!

Carefully solder 2 thin pretinned wires into the holes
marked P P on the drawing, making sure that any

loose strands or whiskers of wire do not touch
any other contacts or component!

On DC layouts connect these wires to a 12-16V
smooth DC supply, on DCC layouts connect them to

the nearest rails, DCC Bus bar or direct to the DCC
controller output.

Locating SC100 with N, TT or OO/HO track

Locate SC100 with the
sensor close to but
not actually touching
the rail. If using with N
or TT gauge track you
may need to cut away
some of the sleeper.
(This picture shows it
with N gauge track)

Power

Signal Connections

P P

Sensor

Power

Power indicator LED

2