Alpha Technologies CXPS 48-2T 48V Pos Gnd - Manual (Page 18)

Argus Technologies Ltd. 053-393-C0 Rev A WC
Printed in Canada. © 2007 Argus Technologies Ltd. ARGUS and CORDEX are trademarks of Argus Technologies Ltd. All Rights Reserved. Page 8 of 32
DC ON
The middle LED (green) is on when the rectifier is delivering power to the load. 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; if the
module is unable to source power as a result of any of the following conditions:
Output fuse blown AC Mains Input Fail Module fail (ramp test fail)
High voltage (OVP) shutdown Thermal shutdown Local shutdown
UPF fail No output power Fan (1 and 2) fail.
The LED will flash (twice per second) when a minor alarm is detected; if the modules output
capability has been reduced or a minor component failure is detected during the following
conditions:
VAC meter fail AC foldback Remote equalize
Fan (1 or 2) fail Low output voltage High output voltage
Current limit (programmable option) Power limit (programmable option) High temperature foldback
Temperature sense fail Soft start operation Communications lost.
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 will extinguish if no AC power is present.
LED Activity During Software Upload
When a rectifier software upload is in progress, the LEDs will behave in a distinctly different way
to indicate new rectifier software is being transferred from the CXC.
When a rectifier data transfer is in progress, all three LEDs will flash in a sequence lasting 1.5
seconds. When the last LED is lit, the sequence is repeated beginning at the first LED.
LED Activity During ‘Locate Module’ Command from CXC
When the ‘locate module’ command has been received from the CXC, the LEDs will behave in
another distinct fashion so that the rectifier is easier to visually identify among adjacent
rectifiers.
This state is entered when commanded via the CXC. The LEDs will flash in a ping-pong pattern
repeating every 2 seconds.
The ping-pong pattern lights each LED sequentially. After the last LED is lit, each LED is lit in
reverse sequence. When the first LED is lit, the pattern repeats. The effect makes it appear as if
the light is bouncing between the first and last LED.
2.4.3.2 Mechanical
A thumbscrew is provided to secure the rectifier into the shelf. During normal operation the
rectifier shall be locked into position. A handle (or grip) is incorporated into the front panel to
facilitate the removal of the rectifier from the shelf. No special tools are required.
2.4.4 Rectifier Rear Panel
Located on the rear panel of the rectifier is a single connector for shelf power and communications.
2.4.5 True Module Fail Alarm
The power modules have a “true” fail alarm. This provides a true indication of the power module’s ability to source
current. When the module’s output current drops below 2.5% of the rated output a low output current condition is
detected and the Module Fail detection circuit is activated. This circuit momentarily ramps up the output voltage to
determine if the module will source current. If no increase in current is detected, the Module Fail alarm is
activated. The module will test once every 60 seconds for the condition until current is detected. Output voltage
ramping will cease upon detection of current
1
. A minimum 2.5% load is required to avoid the Ramp Test Fail
alarm; this can typically be provided with the parallel system battery. Activation of this alarm could indicate a failed
module or a failed load.
1 Under normal conditions, a battery connected to the output of the rectifier will draw current when the voltage ramp occurs. Therefore the rectifier fail
alarm will not be generated with a battery connected.