I-Bus 0818D, User Manual

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Chapter 6 – Platform Management Option
0818D User’s Guide 6-3
6.3 CMC Board Mechanical and Environmental
Specifications
6.3.1 Physical Size
•
9.190” high X 3.150” wide.
•
Mounts to 6U rear panel of I-Bus custom monolithic cPCI
backplane.
6.3.2 User Access
•
Chassis Management Controller Card is mounted vertically in
the rear of the chassis, behind the power supply connectors.
•
Shielded, EMI-filtered type connectors for Chassis
Management Controller
•
Relays and RS-232 interface directly accessible externally
through cutouts in rear 6U panel.
•
Additional headers on the CMC board are available to connect
RS232 devices (such as host SBCs) directly to the board.
6.3.3 Temperature Range
•
Operation: 0
_
C to 55
_
C.
•
Storage: -40
_
C to 85
_
C.
6.4 Sensors Supported
The CMC board is capable of reading temperatures, DC voltages,
fan tachometers, fan health, and power supply health. It can also
output alarm conditions on the relay outputs and LEDs.
6.4.1 Temperature Sensors
There are connector(s) in the backplane to extend the Local I
²
C bus
(I2C3_CLK and I2C3_SDA) to the external temperature sensor
modules (LM75s). The LM75s will be on I
²
C bus 3 of the VSC215
and then tied to I2C3_CLK and I2C3_SDA on the CMC connector
(see figure 7-2).
The CMC supports up to eight temperature sensors.
Temperature sensor 0 (intake) is located In the air intake path at the
bottom of the chassis. Temperature sensor 1 is located in the air
exhaust path at the top of the left side. Temperature sensor 7 is
located in the air exhaust path at the top of the right side.
Temperature sensors 2 through 6 are not currently used.