Train dispatch by the driver

The System

ZAT-RFID is a video transmission system, which Transfers 4 stationary video images from the platform edge onto the screen in the driver’s console of a train via WLAN. The extension ZAT-RFID improves the base System ZAT-FM in several significant aspects.

The advantage of the ZAT-RFID extension is the individual and flexible recognition of single units of railcars and the fast evaluation and distribution of Information within the system. ZAT-RFID controls the WLAN-Access-Points of the station and establishes a clear link to the corresponding railcar unit.


For a secure video-based train dispatch via WLAN, every unit requires a unique SSID in order to communicate. If IDs change during repairs, maintenance or service of the system, every WLAN-Access- Point needs to be updated before the railcars are put back into service.

The administrative effort, especially regarding Software- Updates, resulting from the exchange of single Access-Points and the occurring errors in this procedure, would be disproportionate to its benefits.

ZAT-RFID offers a solution. The system clearly recognizes each railcar unit with 2 RFID-Readers when approaching and leaving the platform. This allows to determine the leading unit, the direction of travel, the number, the ID, the order, the entrance and the exit times of the railcar units.

Function and Configuration

At the station’s track edges, before and behind the platform, two RFID Reader Systems that connect themselves over the station’s switch.

The RFID TAGs do not need an external power supply. They are installed at the outside of the trains front end and send their unique ID while driving by the RFID-Readers. The system recognizes all units and up to 8 power cars of the train (depending on the configuration and equipment of the train) and provides the information to the WLAN Access Points.

While the units of the railcar drive past the platform, the system captures the railcars exact sequence through a multiple reading of the RFID-TAGs. In accordance with the recognized order of the railcars, ZAT-RFID converts the individual ID of the railcar unit into the corresponding SSIDs and sends the information to the Access Point at the edge of the track. It ensures that the transmitted video data fits to the unit of the railcar.

Technical data

Operating voltage 10 bis 30 V DC
Power consumption (24 V DC) typ. 800 mA (without GPIO), max. 2500 mA (incl. GPIO)
Frequency range 865–868 Mhz
Power output max. 30 dBm ERP
Supported protocols EPC Class1 Gen2/ISO 18000-6C
RX-input sensitivity typ. -80 dBm
Temperature range (operation) -20°C … +55°C
Dimensions (HxWxD) 620x386x112 mm
Weight 9 kg
Material (Housing) steel galvanized, fiberglass radome
Processor ARMv7-A compatible processor 1 GHz
Flash-memory eMMC 4 GB
RAM 512 MB 200 Mhz DDR SDRAM
Linux-kernel > Version 2.6
Digital interfaces (GPIO) 4 in- and outputs
Modes Simplex/Semi-Duplex (adjustable)
Maximum power load of digital interfaces per 500 mA, max. 1500 mA
IP Code IP 65
Field angle 30° vertical, 80° horizontal
Swivel angle +35° / 0° / -35°
Polarization circular
Forward gain 6 dBiC
Axial ratio typ. 2 dB
Communication interface Ethernet 10 / 100 MBit/s
Subject to technical modifications
Your benefits:

Video-supported passenger exchange

Fast image transfer

Secure connection

Simplified verification management

Maximum speed (passing) 90 km/h

Simplified maintenance and repair

Railway-approved components only
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