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Function Description |
X728
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| ❶ |
Power Jack and
Connectors |
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Power input |
5Vdc +/- 5% ,
≥3A |
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DC Power Plug Size |
5.5*2.5mm |
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USB power in socket |
Type-C |
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UPS power output |
5.1Vdc
8A |
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Power output connector |
XH2.54mm 2pin |
1. X728 powers the
Raspberry Pi via the 40-pin header (Pin 2 & 4)
2. Don't power the Raspberry Pi via the Pi's type-C USB socket
3. X728 can be powered via the onboard DC jack
or
Type-C USB
power socket |
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Jumper Name |
Usage |
PLD
(Power loss detection)
Pin 1&2 |
Short
- AC Power loss or power adapter failure
detection
enabled
(Active if power adapter disconnected) |
| Open
- Power loss detection disabled |
AON
(Auto power-on)
Pin 3&4 |
Short
- Auto power-on when power applied
(Will delay 3 seconds before
powering on) |
| Open
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Auto power-on disabled |
ASD
(Auto shutdown)
Pin 5&6 |
Short
- Automatic shutdown enabled when
battery
low (≤3Vdc )
Procedure to enable ASD
function --IMPORTANT
1. Battery voltage must be
>3Vdc
2. Insert the battery into the holder
3. Wait 3 seconds then insert the jumper
4. If the jumper inserted before battery, remove
battery & jumper then repeat step 1, 2 and 3. |
| Open
- Automatic shutdown disabled |
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❸ |
Connector for
External Power Switch |
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❹ |
Power button
(Script for power mgnt installed) |
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Pin No. |
Pin Description |
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1 |
Power on/off control connecting to switch |
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2 |
Ground |
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3 |
LED+
for battery low indicator |
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4 |
LED+
for power on, rebooting and shutdown |
1. Please use
momentary switch only and don't use latching switch
2. Connector - Pitch 2.0mm 4pos |
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Press and Release |
Raspberry
Pi and X728 turn on |
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Press and hold for 1~2 seconds |
System
rebooting |
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Press and hold for 3~7 seconds |
System shutting down |
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Press and hold for >8 seconds |
Force
shutdown |
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❻ |
Fuel
gauge - LED Indicator |
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LED Name |
Usage |
BAT
LOW |
LED
red on indicates battery low (≤3.0Vdc) or
blue power button pressed
(Jumper for ASD inserted) |
5V
OUT |
LED green on flashing indicates 5V power out
and UPS powered by battery |
AC
FAIL |
LED
red on indicates AC power loss or PSU
failure or PSU disconnected |
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PWR |
LED
blue indicates
Stays on - Power on
Blinks rapidly - system rebooting
Blinks slowly - Shutting down |
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Operation of Discharging
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Capacity C (%) |
D1 |
D2 |
D3 |
D4 |
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C ≥75% |
ON |
ON |
ON |
ON |
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50%≤C＜75% |
ON |
ON |
ON |
OFF |
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25%≤C＜50% |
ON |
ON |
OFF |
OFF |
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3%≤C＜25% |
ON |
OFF |
OFF |
OFF |
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0%＜C＜3% |
Flashing |
OFF |
OFF |
OFF |
Operation
of charging
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Capacity C (%) |
D1 |
D2 |
D3 |
D4 |
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Fully charged |
ON |
ON |
ON |
ON |
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75%≤C |
ON |
ON |
ON |
Flashing |
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50%≤C＜75% |
ON |
ON |
Flashing |
OFF |
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25%≤C＜50% |
ON |
Flashing |
OFF |
OFF |
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C＜25% |
Flashing |
OFF |
OFF |
OFF |
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❽ |
18650 battery dimension |
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Pin No. |
Usage |
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2, 4 |
+5V
power supply |
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3, 5 |
I2C for
RTC and battery
fuel-gauge systems |
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6 |
Ground |
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29 |
GPIO5
for power management |
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32 |
GPIO12
for power management |
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33 |
GPIO13
for power management |
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31 |
GPIO6
for AC power loss detection
(Jumper for PLD inserted, High=power loss,
Low=Power supply normal) |
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38 |
GPIO20
for buzzer control |
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Do not use 18650 battery with
built-in protection circuit |
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Board Assembly |
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❶ |
Push screws
(M2.5*6mm) up through
the mounting hole on the underside of the Raspberry
Pi. |
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❷ |
Screw the F/F spacers (M2.5*20mm)
down until it is hand tight |
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❸ |
a) Plugs
the X728 board straight
into your Raspberry Pi's
GPIO header
b) Double check polarity of
battery's connector before
placing 1860 batteries into the holder |
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❹ |
Optional -For use with X728-A1
cooling fan.
Screw the F/F spacer (M2.5*12mm)
down until it is hand tight |
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❺ |
Plugs the X728-A1 board
straight into your Raspberry Pi's GPIO header and
screw down
(M/F spacer M2.5*21mm) |
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❻ |
Plugs the X728 board
straight into your Raspberry Pi's GPIO header and
screw down
(Screws M2.5*5mm) |
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❼ |
Optional -For use with X728-A2
2-Cell battery holder
Unscrew the 4 screws on the underside of the
Raspberry Pi |
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❽ |
Push M/F spacers
(M2.5*23mm) up through
the mounting hole on the underside of the Raspberry
Pi and screw down |
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❾ |
a)
Double check polarity of
battery's connector before placing
18650 batteries into the holder
b) Place the X728-A2 on the underside of the
Raspberry Pi
and screw down (M2.5*5mm
screws)
c)
Plugs in the 2-pin power cable into the "BATT'
female
sockets on the X728 and X728-A2 board |
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© 2018
SUPTRONICS TECHNOLOGIES LIMITED, ALL RIGHTS RESEVERED |
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