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NDAS-N. User Manual.
10
3. Connection
A unipolar DC source with a nominal voltage of 12 to 48 volts and an output power of at least 10
watts
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is used for powering the data logger. The permissible range of supply voltage for the main channel
varies from 7.5 to 60 V. The Ethernet connection with the Power over Ethernet (PoE) technology of
IEEE 802.3af-2003 and IEEE 802.3at-2009 with a rated voltage of 48 V (permissible range from 36 to
57 V) and direct current of up to 400 mA can also be used as the main power source. When the data
logger is powered from the main power source, the supply voltage is supplied to all peripheral devices -
both the ones installed inside the data logger and the ones connected externally (provided that the power
supply function of external devices is activated in the menu).
As a secondary power source, a connection to the micro-USB port can be used. The load capacity
of the USB port should be at least 500 mA. The allowable range of supply voltage for the secondary
channel is 4.5…5.5 V. When the data logger is powered only from micro-USB, no power is supplied to
all active sensors, external peripheral devices (connected to the USB-A connector or via RS-485), the
boards connected to the internal Mini PCI-E
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connector are not functioning.
Depending on the configuration of the used data logger, it is necessary to install internal peripheral
modules before powering up: SD card, internal SSD disks, Wi-Fi/Bluetooth/ZigBee adapter, 3G/4G/LTE
modem, SIM card.
Although devices with the Mini PCI-E interface can be connected and disconnected ‘on the
fly’ while powered, to ensure stable operation of the system and to avoid accidental damage
to the data logger the best practice is to operate inside the housing when the power is off.
If the device uses wireless interfaces, connect the appropriate antennas of the wireless interfaces after
installing the internal peripheral modules.
To use external coordinates and synchronize the reference generator via GPS, connect the GPS
antenna to the appropriate connector. Active or passive GPS antennas with an SMA-M type connector
can be used. An adapter is required to connect an antenna with an SMA-F connector.
To operate wirelessly via Wi-Fi or 3G/4G/LTE, connect the antenna to the appropriate connector.
The supplied Wi-Fi antenna connects directly to the connector. An adapter is required for connection of
an external antenna with an SMA-F connector.
Turn on the main power supply. When the power is applied, the device displays the main status
parameters through LED indicators. From the moment the power is supplied until the processor is loaded,
the ‘Power’ indicator displays the presence of the power supply voltage. A complete list of indicators
operating modes is given in Appendix 1 to this Manual.
External peripherals connected via USB 2.0 and RS-485 can be connected and disconnected at any
time without removing the supply voltage.
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The maximum power consumption is determined by the composition of the periphery equipment and does not exceed
12.95 W.
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Contact the manufacturer for references.
