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3.3.12 FAN Connector
3-Wire FAN Connector
CN8
Pin
Signal
1
GND
2
FAN_POWER
3
FAN_TACHO_IN
3.3.13 Recovery Switch
In some cases, a wrong configuration of BIOS parameters could lead the module in an unusable state (i.e. no video output, all USB HID devices
disabled).
For these cases, on the board it has been placed a 3-way switch which can be used to restore the BIOS to factory default configuration. To do
so, it is necessary to place the contact of the switch in 1-2 position, then turn on the module, wait until the board resets itself then turn off the
board. The contact MUST be now placed back to 2-3 position.
During normal use, the contact MUST be always placed in 2-3 position.
3.3.14 GPIO Header
GPIO Header
CN16
Pin
Signal
Pin
Signal
1
+3.3V_RUN
2
GND
3
EXT_GPIO0
4
EXT_GPIO7
5
EXT_GPIO1
6
EXT_GPIO6
7
EXT_GPIO2
8
EXT_GPIO5
9
EXT_GPIO3
10
EXT_GPIO4
SBC-C41-pITX
SBC-C41-pITX User Manual - Rev. First Edition: 1.0 - Last Edition: 1.1 - Author: A.R./S.B. - Reviewed by M.B. Copyright © 2021 SECO S.p.A.
Depending on the usage model of SBC-C41, for critical applications/environments on SBC-C41 it is available
a dedicated connector for an external +12V
The FAN Connector is a 3-pin single line SMT connector, type MOLEX 53261-0371 or equivalent, with pinout
shown in the table on the left.
Mating connector: MOLEX 51021-0300 receptacle with MOLEX 50079-8000 female crimp terminals.
Please be aware that the use of an external fan depends strongly on customer's application/installation.
Managed by the Embedded Controller, on SBC-C41 board there are 8 (eight) GPIOs at electrical
level 3.3V (5V tolerant).
Access to these General Purpose I/Os comes through a dual-row 10-pin SMT male pin-header, p. 1.27mm,
type NELTRON 2199SB-10G-SM-3021-CR or equivalent, with pinout shown in the table on the left.
EXT_GPIO_[0..7]: I/O Expander Input/Output [0..7], voltage reference level: +3.3V_ALW
FAN.
DC
38
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