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NLS 3000 NAVIGATION
LIGHT CONTROL PANEL
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Page 18 of 27
3.6 NLS 3000 VM01-E
VDR module
Width
72 mm
Height
104 mm
Depth
88 mm
Mounting method
Top-hat rail DIN EN 50022
Weight
0.3 kg
3.6.1 General
The VDR module sends data via RS485 or RS232 to a VDR (Voyage Data Recorder). The module
can alternatively be provided with drivers for RS485 or RS232.
The communication profile of the VDR interface is roughly referenced to the following specifications:
IEC 61162-1
Part 1 Single talker and multiple listeners
IEC 61162-100
Extra requirements for the UAIS
IEC 61162-102
Extra requirements for the Voyage Data Recorder
3.6.2 VDR interface
The microcontroller, an ATmega162 with two serial interfaces, communicates with the master via one
of the interfaces and with the other interface via the alternative driver provided for RS485 or RS232.
3.6.3 RS485 communication
Communication takes place via an RS485 driver module. The microcontroller takes over direct
communication with the RS485 bus and filters the messages for the VDR module. The two status
LEDs on the module indicate the status of the RS485 interface:
Green LED: Module status scanned by master
Red LED: Communication problem or timeout