Acer 486 Specifications download pdf (Page 25)

Chapter 3 Connecting peripherals 17

and a DB-25 connector on the other, mounted on a retaining

bracket. The bracket installs at the end of an empty slot in your

chassis, giving you access to the connector.

To install the bracket find an empty slot in your chassis. Unscrew

the plate that covers the end of the slot. Screw in the bracket in

place of the plate. Next, attach the flat-cable connector to connec-

tor CN3 on the CPU card. Wire one of the cable is red or blue, the

other wires are gray. Make sure that wire one connects to pin one

of CN3. Pin one is on the right side of CN3. For help finding the

connector, refer to Chapter 1 (page 5).

The pin assignments for the connector appear in Appendix D.

Keyboard connectors

The PCA-6143P board provides two keyboard connectors. A 5-pin

connector (J1) supports passive backplane applications. A second

6-pin mini-DIN connector (J3) on the card mounting bracket

supports single-board-computer applications. The card comes

with an adapter to convert from the 6-pin mini-DIN connector to

a standard DIN connector.

If you need to make your own adapter cable, you can find the pin

assignments in Appendix D.

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 (JP7)

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 JP7 when pressed (normally-open switch).

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Acer 486 Specifications Page 25