4910 Power Supply Unit
11-7
CONN1
Function: tamper and PSU MON connections to Controller. Each
function uses two terminals on the connector.
Pin Connection
TAMPER Connect to TAMPER pins on CONN3 of the Controller.
PSU MON Connect to PSU MON pins on CONN3 of the Controller.
CONN2
Function: DC power outputs.
Pin Function Connection
+12 +12V (DC +ve output) Controller CONN4 +12V
0V Ground (DC -ve output) Controller CONN4 0V
Safety Earth Controller CONN4
AUX + +ve auxiliary output Controller CONN4 AUX IN +
AUX - -ve auxiliary output Controller CONN4 AUX IN -
LEDs
The battery management board has three LEDs on it which are visible
through windows in the lid of the PSU.
POWER
The green POWER LED lights all the time the mains is connected to
the PSU.
CHARGED
The green CHARGED LED lights all the time the mains is connected
and the battery is fully charged.
CHARGING
The amber CHARGING LED lights all the time the battery is being
charged. The CHARGED and CHARGING LEDs are never on at the
same time.
Note
: when the PSU is running on battery backup, all three LEDs are
extinguished. If the battery is fitted the wrong way round, the
CHARGING LED remains lit all the time.
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