The TPWS Control Unit forms part of the
STS Signals Train Protection and Warning System complying with the
requirements of Network Rail Group Standard GE/RT8035.
The Control Unit contains:-
The control logic for Automatic Warning
system, the Overspeed Sensor System and the Train Stop System.
The power supply.
The brake interface.
The ATP/TPWS interface.
The AWS Receiver selection interface.
A suitable means of connecting all peripheral
equipment.