TTA’s proprietary "Comfort Commander" programmable
logic controller can be used with both new and existing HVAC systems
- is leading the industry in control of HVAC systems and it provides
HVAC control features mandated by today’s rigorous transit
Reliable... the Comfort Commander's electronic
architecture, mechanical configuration, and routine environmental
assure reliable operation on any transit vehicle. Extensive testing
has proven its ability to operate within the harsh environment dictated
by todayÕs vehicle specifications, including temperature extremes,
shock & vibration, and EMI.
Flexible... the Comfort Commander can be
mounted anywhere on a car. Its modular design allows installation
of any quantity and combination of interfaces,
including digital I/O, analog I/O, and LON & MVB vehicle network
interfaces. Customized interfaces are available.
Compatible... control power and I/O operate
directly off vehicle power, allowing easy system interface without
external isolation boards.
Capable... standard features include
HVAC system control, vehicle network communications, and on-board
time-stamped data logging.
Simple to Program... our EZLadder software
allows a non-programmer to create and edit control code without
extensive study time. Powerful pick-and-place
function blocks provide advanced control simply.
PTU availability... graphical software
provides a virtual toolbox for assessing a system's operation.
Software is installable on standard windows-based laptop computers,
and communicates with the Comfort Commander through a standard
RS-232 interface. PTU software provides system status information,
diagnostics assistance, logged data viewing, and modification of
various system characteristics. The graphical user interface is
customized for the specific application.
This equipment meets or exceeds all the control requirements specified
for today’s modern rail passenger vehicles.