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SF02/F
SF02/F
Laser rangefinder
Product manual
3. Making connections to the SF02/F
The SF02/F has four power supply options and a number of digital and analog interfaces. Only one power supply needs to be
connected for correct operation and any one, or more, of the interfaces may be connected to a host controller.
Power supply option 1: USB power
The first option is to power the unit directly from the USB port of a PC or laptop. This is particularly useful for testing the SF02/F
before it is installed in your system and also for changing the settings in readiness for the final application.
Figure 2 :: Power from the USB port
Power supply option 2: Unregulated power
The second power supply option is to connect to an unregulated power supply or battery with a voltage of 6.5 - 9 V DC between
“Vin” and “GND” on the screw terminals. In this configuration a regulated 4.7 V DC power output becomes available on the “+5 V”
screw terminal and this can be used by external circuitry as a source of regulated power. The unregulated power connections can
also be accessed via the Digital expansion port, see page 9 for further information.
Figure 3 :: Battery power
Power supply option 3: Regulated power
The third power supply option is to use a regulated 5 V supply connected between the “+5 V” and “GND” screw terminals. In this
configuration the “Vin” terminal is not used. The 5 V DC supply would typically be taken from an existing power rail that is used to
supply other electronic equipment. The regulated power connections can also be accessed via the Digital expansion port, see page 9
for further information.
CAUTION: The 5 V power input is not protected from reverse polarity. Damage to the SF02/F will result if this connection is reversed.
Figure 4 :: Regulated 5 V DC supply
SF02/F Laser Rangefinder - Product Manual - Revision 10
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© LightWare Optoelectronics (Pty) Ltd, 2016
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