Datasheet

User Manual 990-9189A
DC MX06 60A Shelf Page 13 of 30 18
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FEB 02
2.3.2 Individual Rectifier Alarms
In addition to the system alarms and inputs, six alarm connectors are mounted on the backplane board.
Each one of these connectors offers six alarms/inputs for a particular rectifier. This means the end user
can, if required, monitor each rectifier fitted separately as well as the system as a whole.
SK19 = Rectifier 1 SK22 = Rectifier 4
SK20 = Rectifier 2 SK23 = Rectifier 5
SK21 = Rectifier 3 SK24 = Rectifier 6
Alarm All Sockets Description
Over Temp Pin 1 Open collector opto output is pulled low when unit has
shut down due to over temp conditions. Alarm has 20mA
current capability (not available if system fitted with Single
LED Rectifiers).
Marginate Pin 2 Link the marginate pin to +Ve output or +Ve Sense to
reduce the output voltage by 2.4V. When link removed the
output will return to nominal.
D.C Healthy Pin 3 Opto signal is open collector pulled low when output
healthy (31V-60V). Current capability is 20mA
I Analogue Pin 4 This is an analogue voltage proportional to output current.
Full load (10.5A) is represented by a voltage of 5Vdc
Over Volts Pin 5 Open collector opto output pulled low when output trips
due to over volts. Has a 20mA current capability (not
available if system fitted with Single LED Rectifiers).
Common Pin 6 Reference point for all of the alarms
Current Limit Pin 7 Open collector opto output pulled low when in current limit.
Has a 20mA current capability (not available if system
fitted with Single LED Rectifiers).
SK20SK21
SK22 SK23
SK19
SK24