Eowave Eobody2 USB8 SensorBox - Manual (Page 10)

II.3. How is the unit powered?
USB 8 sensor interface / Power
220V or 110V AC
/9V DC adapter
9V DC
USB powering
USB enables self powering. Just plug the usb from
Eobody2 to your computer usb in. The red activity
LED lights up when the unit is well connected.
External powering
Some sensors need more than the usb current. In
this case, you can power the unit externally with
a 9 V DC / 500 mA power supply. Connect the 9
V DC / 500 mA power supply into the power plug
connector of Eobody2. The red activity LED lights
up when the unit is well connected. An internal
fuse is activated when not plugged right to avoid
major internal damages.
How do I know that I need an external powering?
All 5V sensors need external powering. Eowave 5V sensors are distance sensors.
activity LED
The activity LED will also indicates that an external powering is required if it does not lights when
right plugged.
If the activity LED stops lighting when you plug a new sensor, it may be a indication for a lack of
powering. Try to unplug some sensor to reduce the powering needs. If the activity LED lights up
again when less sensors are plugged, connect an external powering before plugging more sen-
sors. Keep in mind that the power delivered via USB is not always stable and, depending on your
computer, can be too weak to power sensors which would normally require a 0,5V.