NavCom SF-3050 Rev.E User Manual
Page 93
SF-3050 GNSS Product User Guide
– Rev E
3-67
The GNSS sensor is protected from reverse polarity
with an inline diode. It will operate on any DC voltage
between 9 and 32 VDC, 6 watts typical.
Voltages less than approximately 6VDC
will turn the unit off. Voltages from
approximately 5VDC to < 7VDC will
create a brown-out. In such case, power
the unit on as follows:
1. Ignition Pin: Provide power 9 to 32 VDC
2. 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).