22 SBC-411/411E User Manual
Ethernet link/active signal LED
(J4)(J5)
The SBC-411E supports two sets of LED connector for external
LEDs.
Ethernet active signal LED (J4)
A flashing LED indicates that the SBC-411E is transmitting or
receiving data.
Ethernet link signal LED (J5)
A continvously lit LED indicates good linkage between the SBC-
411E and its supporting hub.
Power LED and keylock (J6)
You can connect an LED to indicate when the CPU card is on. Pin 1
of J6 supplies power to the LED and Pin 3 is the ground.
You can use a switch (or a lock) to disable the keyboard. In this
state the PC will not respond to any input. This is useful if you
don’t want anyone to change or stop a running program. Simply
connect the switch between Pins 4 and 5. The pin assignments
appear in the following table:
Power LED and keylock (J6)
Pin
Function
1
LED Power (+5 V)
2
NC
3
Ground
4
Keyboard lock
5
Ground
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