DELTA
Installation, Operations and
Maintenance Manual
4 Alarm Control Unit
4.1 Description
The Alarm Control Unit (ALU) with RS232 & LAN interface and remote monitoring function provides output alarms, alarm threshold adjustments, float and equalize voltage adjustments, temperature compensation voltage settings, low voltage disconnect voltage threshold settings, an equalize charge timer, and system alarm LEDs. In addition, the ALU automatically derates the system output current according to the following table:
Figure 2 shows a front view of Alarm control unit.
Table 13 Voltage Ranges
Input Voltage Range
Output
50% | |
|
|
80% | |
|
|
100% | |
|
|
The module is hot swappable.
4.2Specifications
4.2.1Input Characteristics
Table 14 displays the input characteristics.
Table 14 Input Characteristics
Characteristic
Value
Input Voltage Range
40V to 59.5V for 48V system
20V to 30V for 24V system
Input Current | <0.5 Amps |
4.2.2 Push Buttons
This alarm unit has 3 push buttons on the front panel. These push buttons are used to control the alarm unit. Following are possible functions these buttons will act:
Control
-FL/EQU
-HVSD RST
-SMR RST
-Voltage/Current Display