Description; Ipmc Circuitry - Emerson AXP1620 Installation And Use Manual

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Description

4.5.1

4.5.2

AXP1620 Installation and Use (6806800E23E)

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Description

The AXP1620 has PICMG 3.0 compliant, dual PEMs and is rated for nominal -48VDC to

-60VDC. The PEMs plug directly into the midplane and deliver power to the backplane. Each

input is rated for 80 amps. The two 80 amp feeds each power eight AdvancedTCA slots and the

upper and lower FTMs. Each PEM also generates a separate +12V for redundant powering of

the SAMs. This voltage is distributed to each of these modules across the backplane.

Power conversion for the SAMs and PEMs consists of two 66 watt, +48VDC to +12VDC

converters which distribute dual power busses of +12VDC to separate parts of the system. The

+12VDC outputs are provided on the backplane connector to the rest of the shelf. Power is

redundant through the secondary PEM.

Removing power to these components cannot be accomplished by turning the PEM's

circuit breakers to the OFF position. The PEMs remain powered until the -48VDC

power to each PEM is removed. Make sure you disconnect the power at the external

source before removing the PEM from the shelf.

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.

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.

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 SAM through the IPMB ports of the

PEM. In addition, the IPMC monitoring functions include digital inputs to detect circuit breaker

AXP1620 Operations

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