Quick Start User Guide
t-Boss 7400 ACDC Track Driver
Genesis Technologies Inc.
www.genesisusa.com
Page 7
Installation
Overall Preparation
To better understand the requirements of ACDC track circuits, please refer to the t-Boss 7400 Installa-
tion Diagram (
).
Each track circuit must be:
Ÿ
isolated from adjacent track circuits (including non-circuited track) using suitable insulated joints in
both rails;
Ÿ
free from low resistance paths between the rails such as non-insulated gauge rods, non-insulated
metalized frames in roadway crossing surfaces and very poor ballast; (The t-Boss 7400 can drive
track circuits that have a rail-to-rail resistance of less than two Ohms. However, a resistance
exceeding ten Ohms will yield much better results.)
Ÿ
electrically bonded at all non-insulated rail joints using one or two bonds from one rail to the next;
Ÿ
equipped with a suitable and properly installed diode (also known as a ring-10 diode) at the end of
the track circuit opposite from where the track feed wires are connected;
Ÿ
connected from the rails to the field connections in the case or bungalow using wire no smaller
than AWG #6.
Ÿ
protected by appropriate primary lightning protection (warranty does not cover lightning damage);
Ÿ
equipped with adjustable track limit and a relay resistors suitable for the track driver being used
and the overall application; and
Ÿ
equipped with a track driver such as the t-Boss 7400XP or t-Boss 7400SP.
Appropriate primary lightning protection is also required for the 12VDC battery input.
Wiring and Connections
See separate (11” x 17” drawing provided with each unit) wiring diagram for proper hookup or refer to
Track circuits should be connected such that polarity and phase are opposite to those of adjacent track
circuits. This helps to ensure that activation of the signals will occur should both insulated joints fail
and the circuits become shorted to each other.
Opposite phase and polarity of adjacent track circuits is accomplished by installing ring-10 track diodes
with opposite polarity to those of adjacent circuits. Also, the t-Boss 7400 track output labeled as “+”
should be connected to the positive side of the circuit. This is best understood by examining the
provided wiring diagram and using it as a guide for your wiring hook-up.
When wiring the t-Boss 7400 plug-in connector, MAKE CERTAIN your wiring is correct BEFORE PLUG-
GING IN THE CONNECTOR. Damage to the t-Boss 7400 ACDC Track Driver caused by improper hookup
is not covered by the warranty.
The front-panel connector should have ONLY ONE WIRE PER INSERTION POINT. It is not designed to
hold securely more than one wire.
Make sure to use wire of adequate size for the current it must carry. The B12 and N12 inputs may be
required to carry up to 15 amperes under certain conditions. Each output may see currents up to 6.5
