Delta MCS-1800 - Manual (Page 16)

DELTA MCS-1800 3U Power Shelf
Installation, Operations and
Maintenance Manual
4-1
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
90-150 VAC 50%
150-175 VAC 80%
176-275 VAC 100%
The module is hot swappable.
4.2 Specifications
4.2.1 Input 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