Dosistar NT-LV

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The Dosistar NT-LV is a device for controlling pumps of medium power.

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    Description

    The Dosistar NT-LV is a device for controlling pumps of medium power.

    The device regulates the flow rate to a constant value set by the user. The Dosistar NT-LVP is adaptable to a wide variety of flow meter, e.g. flow meter turbines and ultrasonic sensors.

    Together with the impulse input for the flow meter the device also has multiple configurable digital inputs for use with e.g. level indicators or manually triggered remote pause buttons.

    Next to the inputs the device also has several configurable digital auxiliary outputs in the form of potential free relays. They can be used for switching periphery devices like warning lamps or shut-off valves.

    Like with all Dosistar models the Dosistar NT-LV has the two dosing modes, flow regulation and charge dosing. During flow regulation a liquid is continuously dosed, flow rate and amount are logged and displayed. The dosing only ends if the user manually stops it. During charge dosing the dosing process automatically stops once a predetermined amount has been pumped.

    Of course, the proven warning and alarm functions to protect against under-dosing and dry-running are also integrated in the Dosistar NT-LV. Additionally, the pump can be protected against overload through an adjustable current limit. Next to the functions for protecting the pump, the Dosistar NT-LV also has self-protection functions, over current warning, short circuit protection and temperature monitoring to prevent overheating of the device.

    Technical Data

    ControlThrough the Dositerm NT terminal
    Supply voltage VCC10 - 30 V
    Output0…VCC
    INom= 35 A
    IPeak= 40 A (<3 seconds)
    Auxiliary outputsAlarm relay
    Transport relay
    Optional reserve relay
    Max. 230V, 5A each
    Potential free switching contacts
    InputsImpulse input for flow meter
    3 configurable digital inputs
    1 optional analogue input
    Input for a 4 - 20 mA signal from a scale
    Sensor supply12 V, 500 mA total
    24 V, 250 mA total (optional)
    Protection classIP 65
    Dimensions262 x 226 x 100 mm
    Weight3500 g

    Overview

    The Dosistar NT model line is the redevelopment of the Dosistar pump controls. The devices allow the control and regulation of pumps in different performance classes, and are usable in a wide array of dosing applications in industrial or agricultural environments. They unify the proven operating and device concept of the Dosistar model line with the newest technology.

    Construction

    The Dosistar NT devices contain of two main components:

    • The power unit, which contains the power electronics and the necessary interfaces for controlling and monitoring the pump, and all other peripheral components.
      • Dosistar NT-LV (control of medium-power DC pumps: up to 35A)
      • Dosistar NT-LVP (control of high-power DC pumps: up to 180A)
      • Dosistar NT-Switch (switching of pumps via internal relays, single or multi-channel, ideal for mixing liquids)
    • The Dositerm NT control unit, a compact and intuitive user interface.

    Features of the Dosistar NT device series

    The separation into two devices keeps the assembly costs down and cable length short. A complicated installation of entire wire harnesses from the machine to the user is no longer necessary.

    The Dosistar NT devices can have multiple optional wireless interfaces. 866 Mhz wireless communication between power and control unit, as well as WLAN and Bluetooth modules can be integrated into the devices. This allows a multitude of new applications. Remote control via mobile phone or downloading internal data logs to a PC are equally possible.

    All power units of the Dosistar NT model line have a robust and waterproof casing of protection class IP 65 (dustproof, protection against water jets). They are perfectly viable for use in rough agricultural environments. The Dositerm NT control unit has a protection class of IP 54 (protection against dust ingress in damaging quantities and splash water from any direction).

    If you are interested in our devices, here is a short checklist which helps us to find the optimal solution for your application:

    • Which supply voltage is available?
    • What is the nominal voltage and current rating and how big is the maximum flow rate of the pump?
    • Which active periphery components have to be controlled by the Dosistar NT?
    • Which sensors will be connected with the Dosistar NT and what supply voltage do these sensors need?
    • What are the required cable lengths?

    Not 100% what you were searching for? Contact us anyways. Due to the modular design of the devices we are well prepared for future developments and new applications. We will gladly offer advice and help you with finding your individually optimised solution.