SIC24 - Signal &
Indicator Controller Application Information
General
Information:
The SIC24 can be used in a number of applications.
Various types of signaling systems, Centralized Traffic
Control (CTC) panels and semaphore signal motor drive
control are some types of uses for the SIC24. A
computer is not required for controlling signals with the
SIC24, but certainly could be used for enhanced
operation.
To get the best performace from your SIC24, check out
Tips for
Successful Operation.
Known Problems:
4/29/05 - CV29 does not program correctly when the SIC24
is being programmed in page mode from the program track
using a Digitrax system. Workaround - use direct
mode programming.
SIC24s with this problem can be identified by a single
silver mark on the integrated circuit (IC) closest to the
bus connectors.
8/20/07 - Logic cells do not recognize secondary messages
in version 17. If an input is programmed to send a
primary and secondary message, the secondary message in
not recognized by any logic cell in the SIC24 that sent
the message. This means that any logic using a secondary
message will not work. Also, since the SIC24 built in
Setup 4 - Grade Crossing uses secondary messages it will
not work correctly. Note that the secondary messages are
sent correctly over the bus (loconet) and any other
devices on the bus will not be effected.
SIC24s with this problem can be identified by 17 marked
on the integrated circuit (IC) closest to the bus
connectors. The SIC24 must be sent to Team Digital for
software upgrade.
Specific Applications:
Below is a diagram showing a typical block signal system
using a SIC24 and two DBD22s. This is the default signal
configuration of the SIC24 as it comes from the factory.
Below is a diagram showing a
two track grade crossing with two bell sound modules
using a SIC24 and three DBD22s. This is an example of the
grade crossing setup. This setup is implemented in seven
simple programming steps which include the option for one
or two track operation and the option for a control of
one or two bell sound modules.
The signal, bell and delayed gate lowering are initiated
upon entering an approach. When the island is cleared the
signal and bell stop and the gate is raised.
The minimum LED current limiting resistor value is 470
ohms. Resistor values of 1K work well with most LEDs. The
higher the resistance value, the lower the power supply
requirements.
10 Pin Connectors:
Both input and output connectors are the same. The Team
Digital TSA board plugs directly into these connectors
can be used for easy screw terminal connections. Also
flat ribbon cable insulation displacement (IDC) type
mating connectors can be used. Mating connectors and
ribbon cable are available at some Team Digital Dealers
and at.
Jameco : http://www.jameco.com
mating connector part # - 138377
10' flat ribbon cable, gray part # - 643794
10' flat ribbon cable, multicolor part # - 639672
connector installation tool part# - 73252