Digi XBee 3 Cellular LTE-M User Manual page 328

Deprecated kit (PN XK3-C-A2-UT-U or XK3-C-N1-UT-E)
Number Item
1 Programming header
2 Self power module
3 Current testing
4 Loopback jumper
5 DC barrel plug: 6-20 V
6 LED indicator
7 USB
8 RSSI indicator
9 User buttons
10 Reset button
11 SPI power
12 SPI
13 Indicator LEDs
14 Through-hole XBee
sockets
1 Powering the board with J2 and J5 without R31 removed can cause shorts if the USB or barrel plug power are
connected. Applying too high a voltage destroys electronic circuitry in the device and other board components
and/or can cause injury.
Digi XBee® 3 Cellular LTE-M/NB-IoT Global Smart Modem User Guide
Description
Header used to program XBee programmable devices.
Advanced users only—voids the warranty. Depopulate R31 to
power the device using V+ and GND from J2 and J5. You can
connect sense lines to S+ and S- for sensing power supplies.
CAUTION: Voltage is not regulated. Applying the incorrect
voltage can cause fire and serious injury.
Depopulating R31 allows a current probe to be inserted across
P6 terminals. The current though P6/R31 powers the device
only. Other supporting circuitry is powered by a different
trace.
Populating P8 with a loopback jumper causes serial
transmissions both from the device and from the USB to
loopback.
Greater than 500 mA loads require a DC supply for correct
operation. Plug in the external power supply prior to the USB
connector to ensure that proper USB communications are not
interrupted.
Yellow: Modem sending serial/UART data to host.
Green: Modem receiving serial/UART data from host.
Red: Associate.
Connects to your computer.
See RSSI PWM. On the XBIB-U, more lights are better.
Connected to DIO lines for user implementation.
Press the reset button to reset the device to the default
configuration.
Connect to the power board from 3.3 V.
Only used for surface-mount devices.
DS5: ON/SLEEP
DS2: DIO12, the LED illuminates when driven low.
DS3: DIO11, the LED illuminates when driven low.
DS4: DIO4, the LED illuminates when driven low.
Connects the Digi XBee 3® Cellular LTE-M/NB-IoT modem to
the XBee USB development board.
XBIB-U-DEV reference
1
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