Motorola 900 series - I;0 Distribution Board Front Panel I;0

I/0 Distribution Board
110 Distribution Board Front Panel 1/0
The front panel of the I/ 0 distribution board supplies the following functions:
0 Four serial ports
All four originate on the single board computer. The system console port
(port one) is labeled CONSOLE and utilizes a RJ45 connector.
The
second serial port is labeled SP2/TEL. It utilizes a RJ45 connector. This
serial
port converts to a Telco port when the optional modem is installed.
The
third serial port is labeled SP3.
The fourth serial port is labeled SP4/UPS. It may be programmed to
interface
to an un-interruptible power source (UPS).
0
One RJ45 for SCSI Device Expansion Module cooling sensors, DC failure
and power enable interconnect cable labeled CONTROL.
0
One RJ45 twisted pair Ethernet port labeled 10 BASE T.
Note that the 10 Base T transceiver is not part of the single board
computer's I/0. The I/0 distribution board converts the single board
computer's AUI port to 10 Base T with optional circuitry. A circuit on the
I/0 distribution board allows proper operation of either the AUI port or
the 10 Base T port when only one interface is connected.
0 One DB15 AUI port
This port is not functional when it has been converted to 10 Base Tin the
I/0 distribution board.
0 Modem present LED
0 A 68 pin SCSI II connector
S900RF/D4
The parallel port signals from the single board computer are
not brought to the outside of the module. The parallel port
would not fit on the limited space on the panel and was
omitted.
Figure 2-1. 110 Distribution Board's Front Panel
2-3
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