nextys DCW20 - Features and Benefits

DCW20 User Manual rev. 5
Page 6/34
2 Features and benefits
The main features are:
 Integrated 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