NavCom SF-3040 Rev.F - Manual (Page 77)

SF-3040 Product User Guide
– Rev. F
3-75
Table 8: Pin Assignments
– USB Device Cable Pin
Assignments (Supplied)

To turn the unit on, power must be in the
9 to 30 VDC range. Press and hold in
the I/O button for more than 3 seconds
(see Figure 33).
Voltages in excess of 30 VDC will
damage the unit. The power
supply must be well-conditioned
with surge protection. Vehicular
electrical systems that create
voltage spikes in excess of 30
VDC 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).

Unused pins are commonly missing from
cables. This is a typical cost-saving
practice of cable manufacturers.
USB
Pin #
LEMO
Pin #
Pin Name Pin Function
4 3 Ground/Shield Ground
2 4 USB D- USB data -
3 5 USB D+ USB data +
NC 6 USB ID USB ID
1 7 USB POWER USB 5V power