SMART Embedded Computing 6806800V18A, Installation And Use Manual

Page: 93 / 164

AXP1440-C07 Operations
AXP1440-C07 Installation and Use (6806800V18A) 91
Power is introduced to the PEM using a DC power cable attached to the terminal blocks on
the front of the module (power input cable and return cable). The terminal block consists of
a dual stud connection which prevents the power cables from rotating and provides secure
contacts for the cable lug. There is a plastic cover that protects the cable connections.
4.5.2 IPMC Circuitry
Each PEM is capable of monitoring voltage and circuit breaker status. The PEMs are
loaded with the AdvancedTCA IPMC firmware. Preprogrammed FRU and Sensor Data
Record (SDR) information reside on the PEM and is accessible from the SAM1620-D
through the IPMB ports of the PEM. In addition, the IPMC monitoring functions include
digital inputs to detect circuit breaker trips, voltage sensors to detect backplane voltages,
current sensors to detect current to the backplane, and on-board circuitry to detect failures
on the PEM. The PEMs are managed by the Sentry Shelf Management software. Refer to
the
Centellis 4440/4620 Control via IPMI Programmer’s Reference
guide listed in
Appendix
A
for more information.
Figure 2-3 on page 68
provides a conceptual view of the connections between the PEMs,
backplane, FTMs, and SAMs.
NOTICE
The DC power inputs must only be attached to approved Telephone Network
Voltage (TNV) or Safety Extra Low Voltage (SELV) branch circuits. Branch circuits
must comply with all requirements called for in these safety standards: IEC 60950,
EN 60950, CAN/CSA-C22.2 No. 60950. Attaching inputs to non-TNV/SELV approved
power sources will cause the system to fail compliance with safety regulations.
Table 4-1 PEM IPMB Addresses
Description IPMB Address
PEM A 0x66
PEM B 0x68