I-Bus 0818D, Руководство пользователя

Страница: 51 / 80

Chapter 6 – Platform Management Option
0818D User’s Guide 6-7
6.5.3 Host Interface Ports
The CMC board provide an RS232 serial port to connect to an
external host SBC. Connection is made through DB9 style
connectors and headers on the board.
The default port setup is 19200, 8, n, 1.
The CMC is also connected to IPMB0 in the backplane so that an
IPMI compliant BMC can manage it. The I-Bus 2801 and 2802
SBCs provide such a BMC. Using this interface does not require any
external connectors.
6.5.4 Hot Pluggable Board
The CMC board is hot-pluggable, that is, it will not require the
chassis power supply to be turned off to insert and remove the
board. Furthermore, the insertion and removal of the CMC board will
not cause system interruption or system reset.
6.5.5 CMC Reset Switch
There is an inset reset pushbutton on the CMC board to reset the
CMC micro controller.
6.5.6 Digital Input/Output
The CMC Board provides three TTL Level Inputs and three TTL
Level Outputs, accessible on a DB9 connector.
6.5.7 ACO (Alarm Cut Off)
The CMC board provides an external pushbutton input to allow the
user to disable the audible alarm.
The ACO pushbutton operates as a toggle switch, allowing enable
and disable of the ACO state by pressing the pushbutton repeatedly.
The current ACO state is reflected in the ACO LED.
Activating the ACO (by pressing the pushbutton) when any of the
alarm conditions occurs, will turn off the on-board audible piezo
buzzer. This does not affect the actual alarm condition.
Please Note:
To prevent draining the backup battery on the CMC board
after an intentional system shutdown, press the BAT
pushbutton on the front plate of the CMC Board. Battery
backup will be re-initialized at the next system start-up.