Aux Power - test-drb@ccmp.vtda.org

22 Jun 2005

On Jun 22 2005,  0:34, Philipp Hachtmann wrote:
...
  Hi people,

 on my PDP11/23+ there is that key called "AUX POWER". But it doesn't
do
...
  anything on my machine. The only power switch is at
the back of my
 machine. And there is an unused connector at the back of the front
 panel. From that little panel goes a cable to the back of the PDP which
...
  ends in an unused connector, too.

 Somebody said something about a power bus?? I have not found the posting...
...

 Does a fancy power switching (everything in the rack at once) system
 exist? If yes, what do I need to get my rack complete? 
As Tony has already said, yes there's a power-switching bus, using
3-core cables terminated in 3-pin AMP Mate-N-Lock connectors.  The
control part is in the 861 (or equivalent) power controller and
consists of a small circuit board that drives a contactor (like a
3-pole power relay).  Those controllers are 19" wide rack-mount units,
usually 2U or 3U high.

The "AUX" switch on the front of your 11/23+ can be used for this, but
there are some jumpers on the panel that ought to be changed - or at
least checked - if you do, because that AUX switch is also used to
switch the LTC on and off.

You should be able to find the printset for the front panel and see
what the cables and jumpers do.

-- 
Pete						Peter Turnbull
						Network Manager
						University of York