MANUALE NBC DC 12V 1B
Versione 2 23/11/2016
STEM S.r.l. via della Meccanica, 2 I-27010 Cura Carpignano Pavia Italia Tel. +39 0382 583011 Fax +39 0382 583058 www.stemsrl.it [email protected]
Soggetto a modifiche tecniche senza avviso, nessuna responsabilità sarà assunta per ogni dettaglio. © STEM S.r.l.
NBC DC 12V 1B
(DC/DC Battery Charger)
1
Introduction
NBCDC 12V 1B is the complete solution to use only one product for control and recharging a 12V 7,2 Ah
acid lead battery, for the management of a maximum load of 3A.
The Control Unit uses a DC supply voltage (Vin 12-32 Vdc) and is optimized for use in combination with
photovoltaic panels.
2
Functionality
NBCDC 12V 1B is able to recharge a 12V battery with a maximum DC supply voltage load of 3A. The Battery Charger have a STEP-DOWN
architecture and the charging voltage is compensated by temperature with an external NTC sensor (optional).
Inside the Control Unit there is also a control loop for the optimization of the charge of the battery depending of the solar irradiation (MPPT).
Battery status monitoring during normal function (in presence of DC supply voltage):
DC Supply Voltage LED indicator lights GREEN, DC Supply Voltage alarm NOT ACTIVE.
- Battery disconnected or short circuit (Battery LED lit with RED color, alarm output ACTIVATED)
- Battery connected and charged, voltage higher than 13V (Battery LED lit with GREEN color, alarm output NOT ACTIVATED)
- Battery connected and in charging, voltage in the range 11.5V - 13V and charging current higher than 50 mA, battery is charging (Battery LED
blinking RED and GREEN, alarm output NOT ACTIVATED)
- Battery connected with voltage lower than 11.5V, battery is considered not compliant with the required specifications “battery damaged” (Battery
LED lit with RED color, alarm output ACTIVATED)
Battery status monitoring during emergency condition (lack of DC voltage power supply):
DC Supply Voltage LED indicator lights RED, DC Supply Voltage alarm ACTIVE.
In an emergency status, so when the battery starts running, the device allows you to monitor the battery voltage. When the battery voltage drops
below 9.5V the device will give an alarm (RED LED ON and alarm output ACTIVE).
3
General Technical Data
DATI TECNICI GENERALI
Input voltage
14-30 Vdc,
Battery charging voltage (no load)
14.5 V
Charging current
1 A Max
Battery type
12V – 7,2 Ah acid lead
Connection cables sections
Battery cables: min 0.75 mm
2
/ Alarm cables: min 0,35 mm
2
Housing dimensions
Box: IP 20, Thickness: 17 mm, Height: 90 mm, Width: 60 mm
Battery full charging time
24 h
Working temperature
0°
50°C
Storage temperature
-10°
+70°C
4
Battery Status
The control unit is able to detect certain conditions that allow an analisys of the status of the battery:
Battery status during normal function (in presence of DC supply voltage)
Battery status
LED
(Vin_S)
LED
(Bat_S)
Battery output state
alarm ( Bat_F)
Battery supply voltage
alarm (Vin_F)
Battery disconnected, short circuit or
discharge
Green ON
Red ON
Active (CLOSED)
Not active (OPEN)
Battery connected and charged
(voltage higher than 13V)
Green ON
Green ON
Not active (OPEN)
Not active (OPEN)
Battery connected in charge (battery voltage
in the range 11.5V - 13V)
Green ON
Blinking
RED / GREEN
Not active (OPEN)
Not active (OPEN)
Battery status during emergency condition (lack of DC supply voltage)
Stato della batteria
LED
(Vin_S)
LED
(Bat_S)
Battery output state
alarm ( Bat_F)
Battery supply voltage
alarm (Vin_F)
Battery worn out
(voltage lower than 9.5V)
Red ON
Red ON
Active (CLOSED)
Active (CLOSED)
Battery connected and charged
(voltage higher than 9.5V)
Red ON
Green ON
Not active (OPEN)
Active (CLOSED)
