CALAMP WIRELESS NETWORKS INC. BDP4-EXT8 Manual De Usuario

Two horizontally mounted switched-mode pulse-width modulated T809 power supply modules are used
but not connected in parallel.

Both power supply units have an ON-OFF switch* and one LED indicator on the front panel plus an out-
put voltage adjust potentiometer (13.8 VDC nominal, 13.5 to 18 VDC) accessed via the back panel.

* 

To remove voltage from the power supply PCB, disconnect the main power cords.

Their circuit protection features are:
•  Inrush current limiting
•  Over-current (short-circuit)

-  37 to 48A constant current limiting
-  Reset = auto recovery

•  Over-voltage 

-  18 to 21 VDC = shutdown
-  Reset = Power OFF and ON

•  Over-temperature

-  shutdown of output voltage
-  auto recovery with temperature reduction
-  temperature sensed on transistors and diodes

Power Switch

Illuminates when the unit is connected to AC power and

voltage is available

ON LED 

- Lights bright green when voltage output is normal
- Lights faint green when module has entered over-

current mode

- Green LED is OFF, but power switch is ON indicates
module has shut down due to over-temperature or over-
voltage conditions.