NavCom SF-3050 Rev.B - Manual (Page 71)

SF-3050 User Guide – Rev B
3-69
Voltages less than approximately
6VDC will turn the unit off. Voltages
from approximately 5VDC to < 7VDC
will create a brown-out. In such a case,
power the unit on as follows:
• Ignition Pin: Provide power ≥ 9 to 32 VDC
• Front Panel On/Off Switch: Press the
On/Off switch to turn the unit off. Then
press and hold the On/Off switch in for
more than 2 seconds to turn the unit on.
To set the receiver to power up as
soon as power is applied to the DC
Input port, use the ignition pin (2) in
conjunction with DC power.
Voltages in excess of 34VDC will
damage the unit. The power supply
must be well conditioned with surge
protection. Vehicular electrical systems
which create voltage spikes in excess
of 34VDC will benefit from providing
power protection during vehicle engine
power-up. This can be accomplished
through a relay power-on sequence
and/or power conditioning (such as a
DC to DC converter). Do not connect
equipment directly to the vehicles
battery without in-line protection (such
as a DC to DC converter).