4. Function and Use

2N^® LiftGate is an IoT communication system comprised of a main unit and 1 to 4 Cabin switch units. The system ensures communication between a lift cabin and the lift administrator’s surveillance center, especially in emergency situations due to a power supply failure.

The main unit is an LTE router, which enables LAN connection to the Internet either via a mobile provider LTE network or a WAN interface. You can configure both the connection types as primary / backup as necessary.

The LAN is composed of 3 RJ45 LAN ports (one with PoE) located on the main unit and up to 4 cabin units (Cabin switch) connected to the main unit via a 2-wire cable. The cabling also provides cabin units and connected device with power supply and data. The cabin units transfer data from the 2-wire to 4 RJ45 LAN ports (2 with Poe supply). 2N^® LiftGate differs from common routers by its ability to operate from a backup battery during power outages.  

The Ethernet ports on the main unit support the rate of 10 / 100 / 1000 Mbps and are marked as LAN1, LAN2 and LAN3. 48 V (PoE) supply is available on port LAN1 for feeding a connected device (IP intercom or IP camera, e.g.). 

The DSL line is a two-wire interface for Cabin switch connection.

It combines 48 V supply and communication rate of up to 100 Mbps depending on the cables used and the distance between the cabin and main units.

As a battery supply backup for the main unit and connected cabin units during power outages,a gel-lead-acid accumulator (internal or external) is used. It ensures continuous operation during power outages for a period of time that corresponds to the count of devices connected to the main unit and the aggregate load, see the table below. When the battery gets completely discharged, the system shuts down correctly. A proper battery charging is controlled by a specialized circuit, which provides quick charging after power recovery and subsequent full charging level.