Led Color Selection; System Fault Relays; I 2 C Interfaces - HP Carrier-grade cc2300 Product Manual

CAUTION Electrostatic discharge (ESD) and ESD protection: ESD can damage disk drives, boards, and
other parts. We recommend that you perform all procedures in this chapter only at an ESD
workstation. If one is not available, provide some ESD protection by wearing an antistatic
wrist strap attached to chassis ground (any unpainted metal surface) on your server when
handling parts.
ESD and handling boards: Always handle boards carefully. They can be extremely sensitive
to ESD. Hold boards only by their edges. After removing a board from its protective wrapper
or from the server, place the board component side up on a grounded, static-free surface. Use a
conductive foam pad if available but not the board wrapper. Do not slide board over any
surface.

LED Color Selection

Colors of the ID, disk fault, major alarm, and critical alarm are configurable using 2 position 0.1-inch
shunts/jumpers on header J7D1 (see following table). The ID LED may be configured as blue or white. A
white ID LED needs shunts across pins 3-4 and 5-6.
Table 11-1 Front Panel LED Color Selection (FPIO Board Jumper Settings)
Shunt Pins
ID blue 1-2
ID green 3-4
ID red 5-6
Critical alarm 7-8
Disk 0 fault 9-10
Disk 1 fault 11-12
Spare 13-14
Spare 15-16

System Fault Relays

The front panel board contains four relays. These relays are for power, critical, major, and minor alarms.
The relays are controlled by the SMBUS. Refer to I
LEDs describes the relay outputs.
2
I C Interfaces
This section describes the programming of front panel board.
A PFC8574 remote 8-bit I/O expander on the private I
active low. All outputs power up high (inactive). The PFC8574 I
(read). On system reset, all ones should be written to PFC8574 since the part does not have a reset pin.
Table 11-2 Front Panel Board I2C Interface Input/output Bit Description
Bit I/O
0 O Power alarm
90
On Off
N/C Blue
Green
Red
Red Yellow
Yellow Red
Yellow Red
Name
Writing 0 turns on the power alarm relay and illuminates the POWER
Off
Off
2
C Interfaces for programming information. System Fault
2
C bus controls the front panel alarms. All signals are
2
C address is 40 hex (write) and 41 hex
Description
Chapter 8