Figure 2-2 System Board Power And Esd Connections - Sun Microsystems Fire 15K Hardware Installation Manual

Frame
48V -
CP
+
DC/DC
converter(s)
Logic
ground ties
multi-point
PwrCP
Logic
ground ties
multi-point
48V -
Frame
Board skin
Diode protected board screws
mate with board skin
FIGURE 2-2
+
DC/DC
converter(s)
Logic ground
Frame and
shunt logic
Safety ground
System Board Power and ESD Connections
Chapter 2 Installing the Sun Fire 15K/12K Systems Hardware
Inrush
CNTL
Power control logic
Enables and disables
power converters,
monitors power and
temperature, inter-
2
faces to I C
Board skin spring
contact with frame
1st level engage
Board engage
enables inrush
CNTL
3rd level engage
48V -
2nd level engage
48V +
2nd level engage
Logic ground
(connected by
many pins)
Logic signals
(connected by
many pins)
2
2
I C
2
2
I C
2-5