I've been looking for an off the shelf EPO solution, but so far the only
things I've found are for huge data centers. Anybody know of a product
in my size range, to control roughly 10 EPO shut offs? There's a point
where adding more switch blocks becomes a bit awkward.
Relays are your friend.
EPO switch has Normally Closed contacts (i.e. they open when you hit
the switch)
Power flows through contacts to small relay with NO and NC contacts
(you can use DC or AC supplies)
relay contacts go to UPSes
Multiple relays can be paralleled.
It's "fail safe" because if the AC power to the relay system fails,
the relays drop out, and turn off the UPSes.
Regards,
David Mathog
[EMAIL PROTECTED]
Manager, Sequence Analysis Facility, Biology Division, Caltech
James Lux, P.E.
Spacecraft Radio Frequency Subsystems Group
Flight Communications Systems Section
Jet Propulsion Laboratory, Mail Stop 161-213
4800 Oak Grove Drive
Pasadena CA 91109
tel: (818)354-2075
fax: (818)393-6875
_______________________________________________
Beowulf mailing list, Beowulf@beowulf.org
To change your subscription (digest mode or unsubscribe) visit
http://www.beowulf.org/mailman/listinfo/beowulf
