AC Power Distribution
Sun Confidential: Internal Only
45
SunService Sun Microsystems, Inc. All Rights Reserved. Enterprise Services
AC Power Distribution
All Sun Fire platforms installed in a Sun Fire cabinet are equipped with a
redundant transfer unit (RTU)
, which supports two 220VAC receptacle
modules called the
redundant transfer switch (RTS).
Connect RTS2 (front) & RTS1 (rear) to one power source
Connect RTS3 (front) & RTS0 (rear) to the other power source
http://sunsolve.central/handbook_internal/Devices/AC_Power/ACPOWER_SunFire_Redund_Trans_Switch.html
Caution –
Do not connect the two RTS’s within an RTU to the same
supply. This is less reliable than having one connection only. Use separate
AC sources.
There is normally one redundant transfer unit in a Sun Fire cabinet
containing F3800, F4800, and F4810 systems.
The F6800 system requires two redundant transfer units.
The F4800 platform in a desk-side configuration does not use a redundant
transfer unit. The F4800 platform has three direct 200 to 240VAC inputs to
the chassis.
Note –
On the F6800 platform:
The front RTU powers grid0
The rear RTU powers grid1
RTU
Rack
fan
trays (2)
Primary
200–240VAC
To an AC input box for
all platforms except the
Sun Fire 3800 platforms
220VAC
220VAC
Secondary
200–240VAC
Sun Fire 3800. Direct to
the PSUs for the
only.
RTS
RTS