DC Power Entry Modules (PEMs) for the 64000 Chassis

The DC configuration on the 64000 Chassis includes two Power Entry Modules Hardware component that supplies DC power with EMC filtering and over-current protection. Acronym: PEM. (PEMs), each with a rating of -48/-60VDC up to 250A.

These PEMs supply DC power, EMC filtering, and over-current protection for the Chassis.

Each PEM can supply 100% of Chassis power.

On each DC PEM, there are 5 power segments (5 circuit breakers on the DC PEM).

Both DC PEMs provide power redundancy, a total of 10KW.

The DC configuration does not have its own power source. For each DC PEM, you must supply a mains DC power source that includes batteries and branch circuit breaker of 50A for each terminal block (250A in total).

The DC PEM is a customer replaceable unit.

The two-DC PEM configuration provides full redundancy.

The DC PEMs are located in the bottom-rear of the Chassis.

Important: Do not remove a PEM while it is connected to the DC power source. Before replacing a PEM, confirm that the DC power source is disconnected and isolated.

Rear Panel with DC PEMs on the 64000 Chassis

Item	Description
1	Grill panel that allows for air exhaust.
2	Card cage that holds the rear transition modules (RTM).
3	Backplane that supports up to 14 RTMs.
4	ESD wrist strap terminal.
5	Grounding point.
6	DC Power Entry Modules (PEMs).
7	Rear cable holder.

Item	Description
1	(+) Returnand (-) 48V terminal blocks with pluggable connectors.
2	5 x 50A circuit breakers.
3	PEM LEDs.
4	Locking captive screws to secure the PEM in the Chassis.
5	Extraction latch.