Electrical panel with automatic control and diagnosis system Tehmin for ADH type wagons

The system is intended for equipping saloon type carriages, class I, built by SC ASTRA VAGOANE CĂLĂTORI SA Arad.

The system implements an automation network in the wagon, composed of the vehicle bus (CAN network, CANopen protocol) and the train bus (WTB network, according to UIC556).
The control part ensures the control of the doors, lighting, the minimum voltage relay (protection against battery discharge when the static source no longer works), the reception and processing of various analog signals (battery voltage, charging current, three-phase system voltage values, etc.), as well as the control of the passenger information system (GPS, information for interior and exterior displays, generation of audio messages).
The diagnostic part provides data about the controlled systems and collects diagnostic data from various subsystems (for example: climate control unit, sanitary groups, access doors, etc.).
The diagnostic data of all wagons in a train, which are equipped for this purpose, are centralized here, in order to be transmitted to a ground-based reception system, via WLAN.
WLAN transmission is also used to set up the Passenger Information System (SIP) on trains undergoing wagon overhaul for preparation.
The GPRS/3G system is used for the online transmission of critical faults, with priority A and A1 according to UIC557, from the train to a reception system on the ground. From the ground, data necessary for the SIP update (delays, new train connections, etc.) can be received.

The system is integrated by redesigning the electrical installation and the electrical panel, which is also carried out by SC TEHMIN-BRAŞOV SRL.