Laxven VCD 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, and 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/Electric locomotives.
Laxven has also developed the PC based test equipment to test the Microcontroller based
VCD at the workshop as well as in the Locomotive.
Highly Accurate, stable and reliable Microcontroller based System
Less Maintenance and long reliability
Self diagnostic and fail safe Microcontroller based System
Indicator cum reset panel is provided on each control stand/CAB of the
locomotive for easy access to the driver.
VCD is automatically suppressed in the slave locomotive
VCD can be isolated manually using VCD Bypass switch in case of system
malfunction
A rugged, solid 30.5mm push button switch is provided for
acknowledgement/reset by the driver
A 22.5mm yellow LED is provided for Warning to the driver
LED indications are provided for VCD working, VCD Failure, MU operation and
VCD bypass condition.
A buzzer with 100 dBm sound is provided for warning to the driver.
Power supply can work from 50V to 140V DC and can be used on any Indian
railway locomotive. (24V DC supplied as per customer requirement)
Switch mode power supply provided with built in protection for Reverse Polarity,
Input Over Voltage, Over Current and Short Circuit. High capacity filters provided
for Surge/Transient suppression and EMI/EMC suppression.
6KV optical isolation is provided between the locomotive inputs/outputs and the
system
Events are recorded in a non-volatile memory with date and time stamp.
All the inputs, outputs, internal faults are recorded in the data with date and time
stamp for post analysis.
A Five digit Penalty counter enables the shed staff to know the penalty brake
application occurrences
Rugged, polarized MS circular connectors provided for higher reliability
User configurable parameter entry through Laptop/PC
User friendly and powerful Analysis software for post analysis of data
Potential free contact outputs are provided for interfacing with Anti collision
device.
RS485 port provided for interfacing with other micro processor based systems
Power Supply voltage
:
50 to 140 V DC from loco battery (24 VDC available as per customer requirement)
Power
:
Less than 8 Watts
Temperature range
-5 deg. C to + 80 deg. C
Penalty counter
5 digit counter
Recording System
10000 records are stored in non volatile memory with date and time stamp
Data Entry
Through Laptop/PC
Downloading of Recorded Data
Data can be downloaded to PC using RS232
Digital Inputs
72V DC digital input (Optically isolated,
reverse polarity and surge protected).
Digital Outputs
72V DC digital outputs (Optically isolated,
Short circuit and surge protected).
