Artesyn Centellis 2000 Shelf - DC Installation and Use (June 2014) - Manual (Page 49)

System Overview
Centellis 2000 Shelf - DC Installation and Use (6806800G45F) 49
1.1.4 Node Slots
The backplane in a Centellis 2000 Shelf - DC shelf provides two node slots, oriented horizontally
in the lower and upper part of the shelf. They are accessible from the front of the shelf.
1.1.5 Rear Transition Modules
The node slots can be connected to rear transition modules (RTM) to provide easy access to I/O
signals through the zone 3 connector defined by the AdvancedTCA specification.
The Artesyn Embedded Technologies RTMs can be used as rear expansion boards for node
blades to access the different interfaces on an AdvancedTCA blade through the RTM face plate.
1.1.6 Power Inlet and Power Entry Modules
The power inlet building block supports redundant power connection to the shelf from the
rear. It routes the power paths individually to two high current connectors which mate directly
with the front installed Power Entry Modules (PEMs). The power inlet is a fixed, non-field
replaceable unit.
Up to two field hot-swappable PEMs with a 30 A breaker and line filter are installed. The two
PEMs are used to provide redundant power.
1.1.7 Fan Trays
The system provides fault-tolerant cooling by using two hot-swappable intelligent fan trays,
one accessible from the front and one from the rear. Each fan tray contains two fans which are
speed-controlled by the shelf manager.
1.1.8 Air Filters
The air filters are installed inside the front fan tray slot. They ensure that the shelf operates
efficiently and therefore regular maintenance/replacement is required.
The presence of the air filters is monitored by the shelf manager.