Advantech SPC-57 CN 20 LAN status LED header, CN 26 Inverter signals header, Pin Number

★CN 20 : LAN status LED header

Pin Number	Pin function	Ps.
1	CF_VR	compact flash slot LED indicator,
		positive pole
2	CF_RDY	compact flash slot LED indicator,
		negative pole
3	LED_LINK_P	positive pole of LAN link status LED
4	LED_LINK_N	negative pole of LAN link status LED
5	LED_SPEED_P	negative pole of LAN 10/100 speed
		status LED
6	LED_SPEED_N	negative pole of LAN 10/100 speed
		status LED

Note: If user wants to know the accessing status of CF slot, he can connect the LED positive pole to pin 1 and negative pole to pin 2.

★CN 26 : Inverter signals header

Pin Number	Pin function	Ps.
1	SYS_VCC	+5V
2	GND
3	ENVBK5V	inverter enable signal
4	BLCTRL_SW	backlight strength switch
5	Resev.	reserve pin for future
6	GND
7	Power_LED	System power LED indicator. +3.3V
8	GND
9	Resev.	reserve pin for future
10	Resev.	reserve pin for future
11	Resev.	reserve pin for future
12	Resev.	reserve pin for future

Note: If user wants to know the system power status by self-connected LED, he can connect the LED positive pole to pin 7 and negative pole to pin 8.

★CN 29 : Power-in connector

Pin Number	Pin function	Ps.
1	GND	negative pole of power
		input
2	GND	negative pole of power
		input
3	DC_IN	positive pole of power
		input
4	DC_IN	positive pole of power
		input

Note: CN29 is the main power input port. The DC_IN range is 10V ~ 28V.

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