Specifications
Table Of Contents
- AT-8900 Series Hardware Reference
- Contents
- Models Covered By This Reference
- Why You Should Read This Reference
- Where To Find More Information
- Hardware Description
- Online Documentation
- AT-TFTP Server
- Using Windows Terminal and Windows Hyperterminal
- Switch Start-up
- RS-232 Terminal Port (ASYN0)
- Useful Cables
- Test Facility
- Power Supply Units (PSUs)
- Port, Connector, and Cable Combinations
- Troubleshooting
- Expansion Options
- Restricted Procedures
- Contacting Us
Hardware Reference 23
C613-03075-00 REV A
Power Supply Units (PSUs)
At the rear of the AT-8900 Series switch chassis there are two power supply
bays. AT-8900 Series switches allow for either one or two power supplies to be
fitted (see Figure 9 on page 23). PSUs are hot-swappable and when two PSUs
are fitted in a AT-8900 Series switch they will load share. PSUs contain fans
needed to cool the AT-8900 Series switch. If only one power supply is fitted, a
fan only module (FOM) must be fitted in the second power supply bay. Fitting
two PSUs allows for power supply redundancy.
Figure 9: Rear panel of the AT-8948.
AC and DC power supplies are available. However, combinations of AC and
DC power supplies are not supported. The AT-8900 Series switch will come
with one PSU and one FOM as standard, with the second PSU being optional.
Each PSU and FOM will contain an EPROM allowing for command line
interface identification of the modules. The EPROM will contain information
including the type of module, serial number and revision of the PSU. This
information will be available through the command line interface.
To order additional power supply units, contact your authorised Allied Telesyn
distributor or reseller for more information, or visit
http:// www.alliedtelesyn.co.nz/support/at8900.
The PSUs and the FOM that can be fitted in AT-8900 Series switches are:
■ AT-PWR01 (AC power supply unit)
■ AT-PWR01 (DC power supply unit)
■ AT-FAN01 (fan only module)
For PSU specifications see “Power Supply Unit” on page 4.
LEDs
• For each PSU bay there is one dual colour (green/red) LED situated on
the front panel of the AT-8900 switch to indicate power supply status
• There are two LEDs on the rear panel of each PSU. An illuminated green
LED indicates power good. An illuminated red LED indicates either fan
failure or temperature exceeds the specified limit of 75 º C (167º F)
Controls
• Run/Standby switch DC version only
• Power switch recessed to prevent unintentional operation
CAUTION: DISCONNECT POWER CORD PRIOR TO REMOVAL OF PSU
CAUTION: DISCONNECT ALL POWER CORDS TO DISABLE SYSTEM POWER
AC INPUT
100-240V
50/60Hz
3.0A
PWR
GOOD
FAULT
AT-PWR01
AT-FAN01
FAULT