Brocade FastIron GS and GS-STK Hardware Installation Guide - Manual (Page 30)

20 Brocade FastIron GS and GS-STK Hardware Installation Guide
53-1002186-02
Installation precautions
2
DRAFT: BROCADE CONFIDENTIAL
Power precautions
The following precautions apply to FastIron GS POE and FastIron GS-STK POE 48-port devices:
• If your FastIron GS or GS-STK POE device has 48 ports and only one power supply, and each
POE-enabled port needs 15.4 watts, then a maximum of 31 ports can supply power to
connected devices.
• If your FastIron GS or GS-STK POE device has 48 ports and two power supplies, and the POE
ports are consuming more than 480 watts of power, a single power supply failure will cause
both power supplies to shut down.
• If your FastIron GS or GS-STK POE device has 48 ports and only one power supply, and the
power consuming devices connected to POE-enabled ports consume a total of more than 480
watts of power, the power supply may shut down.
CAUTION
Use a separate branch circuit for each AC power cord, to provide redundancy in case one of the
circuits fails.
CAUTION
Ensure that the device does not overload the power circuits, wiring, and over-current protection.
To determine the possibility of overloading the supply circuits, add the ampere (amp) ratings of all
devices installed on the same circuit as the device. Compare this total with the rating limit for the
circuit. The maximum ampere ratings are usually printed on the devices near the input power
connectors.
CAUTION
All devices with DC power supplies are intended for installation in restricted access areas only. A
restricted access area is where access can be gained only by service personnel through the use
of a special tool, lock and key, or other means of security, and is controlled by the authority
responsible for the location.
CAUTION
For a DC system (DC power supply part number RPSDC-FGS), use a grounding wire of at least 10
American Wire Gauge (AWG). The 10 AWG wire should be attached to an agency-approved crimp
connector, crimped with the proper tool.
CAUTION
For the DC input circuit to the system (DC power supply part number RPSDC-FGS), make sure
there is a Listed 30 amp circuit breaker, minimum -48Vdc, double pole, on the input to the
terminal block. The input wiring for connection to the product should be Listed copper wire, 10
AWG, marked VW-1, and rated minimum 90 degrees Celsius.