Alpha Technologies Cordex 48-1.2kW - Manual (Page 13)

030-834-J0 Rev A Page 7 of 34
2 Features
2.1 Rectifier modules
The Cordex CXRF-HP series of 48V 1.2kW rectifier modules employ an advanced resonant power
conversion technology featuring high power conversion efficiency. All internal semiconductor devices
operate under “soft-switching” conditions and exhibit very low power loss. The reduced power loss leads to
lower thermal stress on the semiconductors and thus improves reliability.
Sustaining low component temperatures is again the primary factor with meeting the three worst-case field
scenarios: (1) 65°C ambient temperatures, (2) full output power, and (3) low AC input (176Vac). While
meeting these specifications, Cordex rectifiers also offer roughly twice the reliability at 55°C and up to four
times more at 45°C ambient temperature.
2.1.1 Rectifier Front Panel
Figure 4–Cordex CXRF-HP 48-1.2kW rectifier front panel
2.1.2 LEDs
The front panel LEDs provide rectifier status summary and help to locate a specific module under CXC
control.
AC
The top LED (green) is on when AC is within valid range and the rectifier is delivering power to the load.
The LED will flash (~2Hz) when AC is outside the nominal range – AC voltage is invalid if the AC Mains
Low or AC Mains High alarm is active. The LED turns off when AC has failed (or no AC power is
present).
DC
The middle LED (green) is on when the rectifier is delivering power to the load. The LED will flash when
communication is lost. The LED turns off when the rectifier is off; e.g., when commanded via the CXC.
Alarm
The bottom LED (red) is on continuously in the event of an active Module Fail alarm. The LED flashes
(~2Hz) when a minor alarm is detected. The LED remains off in the absence of an alarm. If the unit output
is not connected to a battery or parallel rectifier, the LED extinguishes if no AC power is present.
LED Activity During “Locate Module” Command from CXC
When the “locate module” command has been received from the CXC, the LEDs behave in a distinctly
different way so that the rectifier is easier to visually identify among adjacent rectifiers.
This state is entered when commanded via the CXC. The LEDs flash in a distinct pattern repeating every
two seconds.