2 Jun
2011
2 Jun
'11
6:29 p.m.
Pete Turnbull wrote:
What I do know is that the docs say you must draw no
more than 7A from
the 12V supply in a BA23, and one RD51 takes 4.5A. So 2 x RD51 would
overload it. I believe that's the only restriction, because putting a
second RD5x in a BA23C expansion box, connected via an RQDXE, was
supported -- and AFAIR the RQDXE doesn't do anything clever with the
control or status signals.
I checked the drive specs in the BA23 manual.
I don't know if the values are correct, however,
the manual lists 2.5 Amp on the 12 volt.
However, in any case, from my point of view,
it is far better to use an additional PC power
supply (for just the hard drives) when there
are two hard drives used in a BA23 box.
This take the load off the internal power supply.
And if you want to use an RX50 and a TK70
as well, then you would almost certainly exceed
the 7 Amp available on the 12 volt internal
power supply. As I mentioned, always use
the internal power supply for the TK50 / TK70.
Whereas I leave the RX50 outside the BA23
box if there is no TK70, with a TK70 I usually
place the RX50 and TK70 inside the BA23
box and the 2 hard drives outside the BA23
box.
Jerome Fine