5 Apr
2013
5 Apr
'13
6:27 p.m.
Date: Fri, 5 Apr 2013 14:28:36 -0700 (PDT)
From: Brian Roth <abacos_98 at yahoo.com>
I did a quick look at the Eng drawings and while the power
controller is 3 phase it looks like the fans
are single phase. Not sure whats going on inside the power
controller yet. I'll be tearing into this in a couple
of weeks so if anyone has experience with the conversion, speak out.
I know its been done.
The power controller is REALLY simple, very much like the PDP-11
EPO controllers, just bigger. So, there is a voltage sent out
on a 3-wire cable, and if you break two of the wires at the end of the
chain, all units power off. The other wire powers up all units
on the string. Just a little unregulated power supply and some
relays. I think there's an airflow sensor in the blower plenums
that breaks the EPO chain if a blower stops.
Jon