NavCom SF-3040 Rev.F - Manual (Page 68)

SF-3040 Product User Guide
– Rev. F
3-66
power source and the battery switches
to standby mode.
If the voltage on the external power
connector drops below 9.0 V, the PIO
begins to draw some power from the
selected battery and the power draw
from that battery increases until the
external voltage decreases to about
8.3 V. At this point, the selected battery
will be supplying all of the power to the
PIO.
The selected battery is the one with the
lowest measured voltage when the PIO
is powered up or reset. This assures
that the one in standby mode is the
one with the most charge remaining so
that if the selected battery falls below
the threshold and the PIO switches to
the other battery, the user will have the
most time to replace or recharge the
discharged battery.
Electrical Power
A 2-pin LEMO female connector provides electrical
power to the SF-3040. It is located on the bottom of
the SF-3040 (refer to Figure 36). Pin assignments are
given in Table 3.
Table 3: External Power Cable Pin-Out
Pin Description
1 Return, black
2 Power Input 9, 9 to 30 VDC, 8W, red