User`s manual

3-9
Hardware Installation
If the ports are not recognized, please review the
installation procedures. For further help, contact SIIG's
BBS and/or technical support.
11. Turn the system power OFF and make any new serial
device connections to the I/O Expander 4S card.
You have completed the installation.
3-4 Installing the I/O Expander 4S Upgrade Kit
To add two more serial ports, you must install the I/O
Expander 4S Upgrade Kit , which can be purchased from your
dealer. This kit is comprised of:
• Two 16C550 chips
• One 1488 chip*
• Two 1489 chips*
• One bracket with one 9-pin and one 25-pin
serial connectors
*The chips, 1488 and 1489, are now built into the I/O Expander 4S.
The following steps will guide you through installing the
kit’s components.
1. If your I/O Expander 4S board is already installed in
your system, remove it to install the upgrade chipset
and verify jumpers.
2. Install the 16C550 into the empty socket. See figure 3-3
for a detailed layout.