CQ7-A30
CQ7-A30 - Rev. First Edition: 1.0 - Last Edition: 2.0 - Author: S.B. - Reviewed by G.G. Copyright © 2016 SECO S.r.l.
16
CAUTION: handling batteries incorrectly or replacing with not-approved devices may present a risk of fire or explosion.
Never use two different PSUs connected simultaneously to Power connectors CN30 and CN40
2.3
Electrical Specifications
CQ7-A30 board needs to be supplied using a standard ATX Power Supply (only +12V
DC
± 5% voltage is needed).
This voltage can be supplied through a standard 6.3mm (internal pin, diameter 2.5 mm) DC Power Jack, CN40. Internal pin is VIN power line.
Alternatively, it is possible to use an internal Molex Mini-Fit Jr. connector, p/n 39-28-1043, or equivalent, with the pinout indicated in the following table.
The mating Connector is MOLEX p/n 39-01-3042 or equivalent, with female
crimp terminal MOLEX series 5566. The use of wires with section 18 AWG
or 20AWG is recommended, in order to ensure the proper amperage of the
power section.
All the voltages that are necessary for board
’
s working are derived internally
from +12V_A power rail.
When choosing the power supply unit for CQ7-A30 board, please take into account all the possible consumptions of the Qseven
®
module and of all the external
devices and/or the adapter boards connected to the system, which take their power supply directly from the carrier board.
This way it will be possible to choose a PSU capable to supply enough current for the whole system.
2.3.1
RTC Battery
For the occurrences when the system (Carrier Board + Qseven
®
module) is not powered with an external power supply, on board there is a horizontal battery
holder, for the use of standard coin cell batteries type CR2032 with a nominal capacity of 220mAh, to supply, with a 3V voltage, the Real Time Clock and CMOS
memory mounted on the Qseven
®
module.
It is possible to exclude the coin cell battery from supplying the VCC_RTC pin, simply by jumper JP13, ,
which is a standard pin header, P2.54mm, 1x3 pin, according to the table on the left.
The batteries should only be replaced with devices of the same type. Always check the orientation before inserting and make sure that they are aligned correctly
and are not damaged or leaking.
Never allow the batteries to become short-circuited during handling.
Batteries supplied with CQ7-A30 board are compliant to requirements of European Directive 2006/66/EC regarding batteries and accumulators. When putting out
Power Connector - CN30
Pin Signal
Pin Signal
1
GND
3
+12V_A
2
GND
4
+12V_A
JP13 position
VCC_RTC voltage
1-2
Coming from Coin Cell Battery
2-3
Tied to GND through 1k
Ω
resistor
