User Manual

TRAIN CHIEF® II LRCS W/ Lightweight OCU-BT – OPERATORS MANUAL
95-00-0-062, Rev 08 3-8 Control Chief Corporation
Programmable Logic Controller - SLC 500 System
The SLC 500 is the control center for the Train Chief® II system. The SLC 500
incorporates the necessary I/O modules to control the various locomotive interfaces based
on a ladder logic program, specifically, developed for locomotive remote control and tuned
for your particular application.
1746-P3 POWER SUPPLY
Allen-Bradley SLC 500 power supply modules include a LED that illuminates when the
power supply is functioning properly. Power supplies are designed to withstand a brief
power loss (brown-out) for a period of between 0.02 to 3 seconds, depending upon
loading conditions. The P3 fuse is accessible by opening the module’s front panel
located to the upper left of the input terminal block. A replacement fuse can be
obtained from your local AB distributor or through Control Chief Customer Service.
CHASSIS
The chassis houses the P3 power supply, processor, and all the I/O modules. All
components slide easily into the chassis along guides formed into the chassis. No
tools are required to insert or remove the processor or I/O modules. The power supply
and removable terminal strips on the I/O modules do require a philips screwdriver for
removal and installation.
SLC 500 PROCESSOR
The SLC 500 processor utilized in the Train Chief® II system contains the primary
control program. The processor is programmed using ladder logic which is uniquely
suited for control applications. For troubleshooting purposes the processor provides
several LED indicators; RUN, FAULT, and BATT (other modules will have additional
indicators, but the ones listed are the most important).
MEMORY MODULE
The memory module is a plug-in to the processor module and provides non-volatile
and secure program storage for the specific ladder program for your particular
application.
ANALOG MODULE(S)
The analog modules incorporate high-resolution providing for precision control of
analog outputs, which are typically used to control the proportional pneumatic valves
for locomotive brake, trainline brakes, and where applicable, pneumatically controlled
locomotive throttle. The modules also incorporate high resolution inputs to precisely
monitor the controlled pressures. The modules feature input filtering providing high
immunity to electrical noise.
OUTPUT MODULE(S)
The output module(s) provide the means with which to actuate the various functions on
the locomotive system. Typical functions controlled by the output modules include;
generator field, reverser directional selection, sand, horn, bell, throttle position, and
indicator lights/strobe. Intermediate relays are used (located in the locomotive interface
panel) where a control function current rating may exceed the rating of an output
module. All output modules provide LED indicators for each output point. The LED’s
illuminate when the processor applies power to an output terminal.