SBC-C31
SBC-C31 User Manual - Rev. First Edition: 1.0 - Last Edition: 1.0 - Author: A.R. - Reviewed by D.T. - Copyright © 2021 SECO S.p.A.
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3.3.13
I/O Connectors
The SBC-C31 board offers the possibility of expanding its functionalities by using some additional interfaces, available on two
dedicated 10 pin connectors CN51 and CN52, type Molex p/n 501645-1020.
Mating connector MOLEX 501646-1000 receptacle with MOLEX 501647, 501648 or 503096 series
female crimp terminals.
The pinout of these connectors are shown in the tables on the left.
Signal Descriptions:
+3V3_OUT: +3.3V Output Voltage Rail, derived from +3V3_ALW (limited to 1A)
VOUT_EN: Output enable signal, active high signal, +3V3_RUN electrical level.
I2C_SDA_EXT_3V3: External I2C Bus data line. Bidirectional signal, electrical level +3V3_OUT with a 1K5
Ω
pull-up resistor. It is
managed by the processor
’
s I2C controller #1
I2C_SCL_EXT_3V3: External I2C Bus clock line. Bidirectional signal, electrical level +3V3_OUT with a 1K5
Ω
pull-up resistor. It
is managed by the processor
’
s I2C controller #1
PWM0_3V3: Pulse Width Modulated output signal, electrical level +3V3_ALW
OUT_Open_Drain: Open Drain Output Signal, max voltages 12V, max current 205mA
GPIO_OUT1/GPIO_OUT2/GPIO_OUT3: General purpose I/O signals, electrical 3V3_RUN. Each one of these signals is
filtered using a passive low-pass RC filter (
Τ
= 10ns)
OUT1..OUT8: the interfaces available on these pins depends on the factory alternative purchased.
The possible alternative configurations for OUT1..OUT4 are:
•
RS-232 ports
•
RS-485 ports
The possible alternative configuration for OUT5..OUT8 are:
•
RS-232 ports
•
RS-485 ports
•
4x GPIOs
I/O Connector #1 CN51
Pin
Signal
1
+3V3_OUT
2
VOUT_EN
3
I2C_SDA_EXT_3V3
4
I2C_SCL_EXT_3V3
5
OUT_Open_Drain
6
OUT1
7
OUT2
8
OUT3
9
OUT4
10
GND
I/O Connector #2 CN52
Pin
Signal
1
+3V3_OUT
2
PWM0_3V3
3
GPIO_OUT3
4
GPIO_OUT1
5
GPIO_OUT2
6
OUT5
7
OUT6
8
OUT7
9
OUT8
10
GND
