Delta manual Alarm Control Unit, DELTA MCS-1800 3U Power Shelf, Description, Specifications

DELTA MCS-1800 3U Power Shelf

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

90-150 VAC	50%
150-175 VAC	80%
176-275 VAC	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

4-1