SH4R Shelf
l Clearance Requirements
l Heat Dissipation
l FTM-4
l Air Filter Pads
Power
A centralized power supply architecture is supported. The PSM-AC4s convert the
external AC power to internal 12 VDC which is distributed to all modules via the
backplane.
The PSM-AC4s work in a redundancy configuration, supplying the required power to the
shelf in a load-sharing mode. If one of the PSM-AC4s fails, the remaining PSM-AC4s
continue supplying power to the entire shelf. This action enables the replacement of the
failed PSM-AC4.
The following redundant configurations are supported:
l 1+1 — Two PSM-AC4s (slots 35 and 36)
l 2+1 — Three PSM-AC4s (slots 35, 36, and 37)
The SH4R also supports the following non-redundant configurations:
l 1+0 — One PSM-AC4 (slot 35)
l 2+0 — Two PSM-AC4s (slots 35 and 36)
The AC power cables are connected directly to the front of the power supply at the rear
side of the shelf.
l AC Power Source Requirements
l General Power and Grounding Guidelines
l Electrical Safety Guidelines and Warnings
l PSM-AC4
Grounding
The SH4R contains the following ground terminals and connectors:
l Chassis ground
l Signal ground
l Strap for 2-zone/3-zone operation
l ESD ground
The signal ground and 3-zone ground configuration are not supported in
this release.
FSP3000 C Hardware Guide - R1.1 - Issue:A (12/09/2016) 37
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