Instruction manual

Page 3-6 Chapter Three
Eagle 450 Installation and Technical Manual, Rev. 00
Narrow SCSI Termination
In most cases, terminating the narrow SCSI bus is simple: plug the active narrow terminator (PRA-
00222-21) supplied with your computer into the external SCSI connector or, if you have one or more
external devices, into the unused SCSI connector on the last device.
The only exception to this is if you have an external Wide SCSI device as the last device on the narrow
cable. In this case, you must get an active Wide SCSI terminator, part number PRA-00222-20, and plug
it into the unused SCSI connector on the last Wide device.
SERIAL I/O CONFIGURATION
The AM-138 CPU board in the Eagle 450 includes eight on-board serial ports, plus three I/O expansion
slots. The on-board ports support full modem control, and the attached AM-90 Lightning cards provide
surge protection and RJ-45 jacks for the ports on the back panel.
The following sections discuss the boards and board combinations supported in the expansion slots,
signal pinouts, and serial cable packages available from Alpha Micro.
You can find information on software setup of the serial ports, including the interface driver names
to use, in Chapter 4.
Serial I/O Boards Supported
You can use any of these serial I/O cards in the three expansions slots of the Eagle 450:
• AM-318-10
: This 8-port board is the preferred I/O board for the Eagle 450. It supports modem
control and has built-in lightning protection from the included AM-90 Lightning cards. It
occupies two back panel slots, each with four RJ-45 jacks.
• AM-314
: This older 4-port board also supports modem control. In its standard configuration, it
uses a DB-9 connector for each port, occupying two back panel slots for each 4-port board. You
can attach an AM-90 to it, adding lightning protection and changing the back panel configuration
to one slot with four RJ-45 jacks. The AM-314 does not support the Super I/O software.
• AM-318-00
: An 8-port board without modem control or lightning protection. All eight ports are
contained in a single RJ-21 back panel connector.
• AM-318-02
: An AM-318-00 with two AM-90 cards added, providing lightning protection and
changing the back panel configuration to eight RJ-45 jacks in two slots.
While you can use these boards in any combination, the AM-318-10 is preferred because it includes the
most features—full modem control, lightning protection, and Super I/O support—and the highest number
of ports—eight per expansion slot. The other AM-318-xx boards do not offer modem control; while the
AM-314 provides only four ports per expansion slot and doesn’t support Super I/O. If you use three AM-
314s instead of three AM-318-10s, your Eagle 450 will include only 20 total ports (including the eight
on-board ports) instead of 32.