Delta MCS-600 Power Shelf
Installation, Operations and
Maintenance Manual
REV.: 03
4-1
Customer Specification Confidential
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:
Table 12 Voltage Ranges
Input Voltage Range
Output
90-120 VAC
50%
121-175 VAC
70%
176-275 VAC
100%
The module is hot-swappable.
4.2 Specifications
4.2.1 Input Characteristics
Table 13 displays the input characteristics.
Table 13 Input Characteristics
Characteristic
Value
Input Voltage Range
20V to 59.5V
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
Table 14 displays the Push Buttons
Settings Description
