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Fan Tray
A removable fan tray, with two fans, is located below the card slots. These fans provide
vertical airflow to aid in heat dissipation. The fan tray can be removed for maintenance
or replacement without powering down the Broadmore. Empty module slots must be
covered by blank panels to maintain proper air flow.
NOTE:
require a high-capacity 3-fan tray for cooling. (Contact factory for details.)
Power and Redundancy
There are two power input connectors, labeled A and B, for receiving –48 VDC at the
rear of the chassis. Normally, power is provided directly from the installation facility's
–48 VDC source to the connectors at the rear of the chassis. The Broadmore will
operate with one power input but connecting an independent power source to the
second input will provide redundancy.
A redundant AC power supply tray (P/N 7660-17PS) is available as a separate unit
designed to be rack-mounted directly below the Broadmore 1750 chassis. The AC
Power Supply supports two non-load-sharing, hot-swappable power supply modules.
Each module is capable of supporting a Broadmore 1750 with a fully loaded
complement of interface cards. It is recommended that each power supply have its own
separate fused outlet for true power redundancy. There is no impact to the Broadmore
1750 as long as one (or both) of the modules is operating normally.
Grounding
Ground lugs at the rear of the chassis allow connection to the building ground system.
A separate ESD ground connection is provided for use with a ground strap when
performing maintenance.
Alarms
A four-wire terminal block at the rear of the chassis provides "form C" relay contact
closure connections for major and minor alarm signals.
Broadmore 1750 - Release 4.6
Configurations using more than four Structured DS3 SAMs
Product Description
Fan Tray
1-9
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Troubleshooting
