VCD means Vigilance Control Device
LAX-VCD-D is micro controller based equipment designed and manufactured to enhance the
safety of the locomotive operation by ensuring the alertness of the crew all the time. The system is
multi-resetting type and operates in a fail-safe manner. The system is reset by specified normal
operational activities of the crew and also by pressing an acknowledgement push button. Absence
of the normal driving functions and the acknowledgement at specified intervals will activate VCD
to flash a warning light and audio alarm. If still not acknowledged, the VCD will initiate the
application of Penalty brake through a separate Magnet valve. The system has also provision for
logging nearly 10,000 occurrences of events such as Application of penalty brake, release of
penalty brake, VCD bypass, configuration changes, VCD Power ON/OFF etc with date and time
stamp in its non-volatile memory. The above events can be downloaded to a PC using Analysis
software. The System also has a provision to display No. Of occurrences of Penalty Brake
application which increments whenever the penalty brake is applied.
The system is powered from the DC voltage available in the locomotive. It is suitable for voltage
variations between 50V – 140 V DC and is thus fit for application on all Indian Railway Diesel/
VCD means Vigilance Control Device (Medha).