NavCom SF-2040 Rev.F - Manual (Page 31)

SF-2040 User Guide – Rev. F
which create voltage spikes in excess
of 30VDC 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).
Two supplied removable Lithium-Ion battery packs
(P/N 59-020102-3001) provide secondary power
when the primary external voltage is not available
(see Figure 3). External power has precedence over
the batteries, but does not charge the batteries. Each
of the two battery packs is designed to last >5 hours
on a single charge (conditions vary with use). The
smart battery interface allows the batteries to be hot-
swapped on the fly.
When battery 1 voltage level is 7.5VDC to 8.2VDC,
the sensor automatically switches to battery 2 to
provide continuous power. For detailed information on
the battery packs, refer to:
9
Table 5: Battery Status Indication
9
Chapter 3 Installation\Battery Charging
9
Chapter 5 Safety Instructions\Battery Packs
Communication Ports
The SF-2040 provides two 7-pin female LEMO
connector communication ports labeled COM1 and
COM2 located below the indicator panel, as shown in
Figure 3. Each conforms to the EIA RS-232 standard
with data rates from 1.2 to 115.2kbps. The connector
pin-outs are described in Table 4. The supplied
interface data cable (P/N 94-310090-3003) is
constructed as described in Figure 4. The SF-2040 is
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