Thingmagic Mercury xPRESS Platform v1.7 Manual de usuario Pagina 120

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A DIVISION OF TRIMBLE
120 Hardware Reference Guide
5V from Comm Bus Connector (Most common source will be Power-over-Ethernet,
“POE”, adapter).
The AC adapter and “POE” power sources cannot be used simultaneously. A jumper on
the board (J12) controls which will be used, if present. When “POE” power is enabled, all
other incoming power sources are disabled, including AC adapter, USB, and battery
(although they remain connected to each other so the battery would be charged by the
AC-adapter or USB interface in the background).
In addition, the xPRESS motherboard is capable of sourcing current to the USBOTG
interface to power USB client devices.
The dependencies and capabilities of the power sources are summarized in this table:
Additional operational information on each power source is provided below.
AC Input Adapter
The voltage level into the AC Input adapter is required to be 5 VDC to support all
modules. Protection is provided to the internal circuitry if the voltage is above 6V,
but
damage will result if incoming voltage is greater than 24 V). If this voltage falls below 4.3
V when other power sources are present, this line is automatically disconnected from the
AC Adapter
Input (5
VDC)
USB OTG-
capable
input (5
VDC)
Li-ion Bat-
tery (3.5 to
4.2 VDC)
“POE”
power from
Comm Bus
(5 VDC)
M6e
sup-
ported?
Micro at
full
power
(+30
dBm
sup-
ported?)
Micro at
less
than
+20
dBm
sup-
ported?
Can
power
exter-
nal USB
client?
Present Not Present Not Present Not Present Yes Yes Yes Yes
Not Present Present Not Present Not Present No No Yes No
Not Present Not Present Present Not Present No Yes Yes Yes
Present Not Present Present Not Present Yes Yes Yes Yes
Not Present Present Present Not Present No Yes Yes Yes
Present Present Not Present Not Present Yes Yes Yes Yes
Present Present Present Not Present Yes Yes Yes Yes
(Ignored) (Ignored) (Ignored) Present Yes Yes Yes Yes
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