Mean Well DBU-3200 Series, Инструкция по эксплуатации, Страница: 5 / 18

3
CN500
7 8
1
2
6.Explanation of Operation Logic : (3 stage charge)
5.LED Indicators
SW1
Pin No.
1,2
Function
Terminal
resistance
Description
SW1 is the selector of terminal resistor that is designed for DA/DB signals and parallel control function.
At the beginning stage of operation, the charger provides the largest current to charge the batteries,
the LED indicator will lighten in orange. After a period of time (probably a couple of hours, based on
the capacity of the batteries), charging current will decrease gradually. When the output current
reduces to 10% of its maximum value, the charger will go into “float” mode, the LED indicator will
turn to green. The relationship between charging current and charging voltage for each operation
stage is shown in the curves below:
Charge Current
Constant Current
(CURVE_CC)
stage 1 stage 2 stage 3
Constant Voltage
(CURVE_CV)
(CURVE_FV)
Float
Start
Charge Voltage
100% CC
10% CC
boost
float
V
V
Orange Green
Color of LED
STATUS
BOOST CHARGE VOLTAGE
FLOAT CHARGE VOLTAGE
28.8V
27.6V
DBU-3200-24
57.6V
55.2V
DBU-3200-48
Figure Charge Curve 6.1
CONSTANT CURRENT
110A 55A
Pin No.
1,2
7
8
5,6
3,4
Function
DA
SDA
SCL
DB
-V (Signal)
Description
Differential digital signal for parallel control.
Differential digital signal for parallel control.
Serial clock used in the PMBus interface.
Serial clock used in the PMBus interface.
Negative output voltage signal.
It is for local sense; and certain function reference; it cannot be connected directly to the load.
LED
Green
Orange
Red
Float (stage 3)
Charging (stage 1 or stage 2)
Description
Abnormal status (OTP, OLP, Fan Fail, Charging timeout)