nextys DCW20, User Manual, Page: 6 / 35

DCW20 User Manual rev. 5 Page 6/34
2 Features and benefits
The main features are:

Integ
rated battery charger for 12…48V multi-chemistries batteries with a charging current up
to 20A

Can be operated with SUPERCAP capacitors instead of batteries

20 A or 960W rated load

Automatic sensing of input voltage, load current and battery current

Battery protection against reverse polarity connection and overcurrent

Battery health monitoring system: measuring battery resistance, battery temperature,
charge/discharge cycles and Coulomb counter

User settable maximum backup time

Remote inhibit input

Connection for a battery thermal sensor (optional)

Modbus over USB and RS-485 interfaces for control and monitoring

Auxiliary output from the battery voltage (max. 5A), protected against overcurrent/short circuit

Suitable for energy management applications

Suitable for
POWERMASTER
software (available for Windows and Android)
Embedded user interface:

4 keys and 1 color graphic LCD display

Allows online device configuration

Displays the DCW20 status and alarms

2 Dry contacts for programmable status signals
Free PC and Android application
POWERMASTER
used for:

Connection through Modbus

Remote monitoring and configuration

Firmware upgrade

Same functionalities of the embedded user interface with the ease of the PC benefits
3 Functional description
DCW20 is a high performance digitally controller DC-UPS that can be used in any DC system with a
rated voltage between 12V and 48V and up to 20A.
At the core of the device a bidirectional DC/DC buck-boost converter (see Figure 2) acts as a battery
charger when the input supply is present. In case of a power outage (backup) the converter keeps the
output voltage regulated draining power from the battery. The converter is digitally controlled.
DCW20_040-02-700-005-EH-1117