Aeron SBC-350A Specifications download pdf (Page 25)

Chapter 3 Connecting peripherals 19

External switches and indicators

Next you may want to install external switches to monitor and

control your CPU card. These features are completely optional —

install them only if you need them.

Reset switch (J1)

You can connect an external switch to easily reset your computer.

This switch restarts your computer as if you had turned off the

power then turned it back on. Install the switch so that it closes the

two pins of J1.

Power LED and keylock (CN1)

You can connect an LED to indicate when the CPU card is on. Pin

1 of CN1 supplies power to the LED and Pin 3 is the ground. For

help finding CN1 see the figure on page 5.

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 of CN1. The pin assign-

ments for CN1 appear in the following table:

Power LED and Keylock (CN1)

Pin Function

1 LED Power (+5 V)

2 No Connection

3 Ground

4 Keyboard lock

5 Ground

Hard disk drive LED (CN2)

You can connect a LED to connector CN2 to indicate when the

HDD is active. Marks on the circuit board indicate LED polarity

(the pin on the left is positive).

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Aeron SBC-350A Specifications Page 25