User Manual

120 20191-100a Paragon-III User Manual
14
3.1.6 Power Supply Modules
Two switched mode pulse width modulated T-809 power supply modules are
used but not connected in parallel.
Both power supply units have ON-OFF control and remote sensing via a rear
mounted DE-9 connector, and an output voltage adjust potentiometer (13.5
to 18 VDC).
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
Front Panel Indications
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.
Figure 12 - T-809 Power Supply Module
®
Power Supply
Power
On