ServerNet Cluster 6770 Hardware Installation and Support Guide

Introduction to the ServerNet Cluster Switch (Model
6770)
ServerNet Cluster 6770 Hardware Installation and Support Guide—522544-002
1-10
AC Transfer Switch
AC Transfer Switch
The AC transfer switch allows the ServerNet II Switch and related components to be
powered from two independent AC power rails:
•
The primary power rail connects to an AC line cord.
•
The secondary power rail connects to a different AC line cord.
Replacement by a service provider trained by HP is recommended. The AC transfer
switch is a Class-3 CRU, and will probably cause a partial or total system outage if the
documented replacement procedure is not followed correctly. Customers replacing
Class-3 CRUs should have either six or more months experience with replacing
NonStop S-series CRUs or equivalent training. Customers must:
•
Be able to use the tools needed for the replacement procedure
•
Protect components from electrostatic discharge (ESD), and must
•
Understand the dependencies involved in NonStop S-series CRU-replacement
procedures.
Uninterruptible Power Supply (UPS)
The R1500 is a 1500-watt intelligent UPS that allows the ServerNet II Switch to ride
through AC disruptions. The ServerNet II Switch draws a maximum of 115 watts;
therefore, the UPS has more than 2 hours of battery capacity. Three versions of the
UPS are available:
•
North American
•
International
•
Japanese
The UPS is a field-replaceable unit (FRU), which is a unit that can be replaced in the
field only by qualified, trained service providers and cannot be replaced by customers.
A unit is classified as a FRU because of safety hazards such as weight, size, sharp
edges, or electrical potential; contractual agreements with suppliers; or national or
international standards.
Figure 1-9. AC/DC Power Supply of the ServerNet II Switch
VST807.vsd