1269 User Manual
Understanding The 1269 6-3
Power Supply
Protections
The seven VXIbus power supply outputs are protected for:
C
Over-voltage
C
Over-current and short circuit
C
Over-temperature
The AC input of the power supply
includes protections for:
C
Input current fusing
See
Appendix A
for specification details pertaining to the
above protections. If any of the above protections are active,
the power supply may shutdown. This means it has,
effectively, turned itself off to protect the system. The Power
On/Standby switch or the Remote Inhibit input must be cycled
to turn the mainframe back on. Refer to
Powering On The
Mainframe
and
Using Remote Power On/Standby
Switching
in
Chapter 3.
Backplane
The Backplane serves several functions
C
Accommodates up to 6 C-size VXI modules and
up to 3 B-size VXI or VME modules. The plug-in
Personality module allows either the
C0 slot
or
B0 slot
to function as the mainframe
VXIbus
Slot 0
location.
C
Rigid mechanical interface which accommodates
a lifetime of insertions of VXI modules and the
plug-in power supply.
C
Supplies DC voltages and currents to modules.
C
Connects the VME communications interface
across P1 and P2 to all slots CO.
C
Connects the VXI extensions across P2 rows a
and c to all slots. There is no VXIbus connection
between B-Sized and C-Sized slots.
C
Connects the monitoring system module,
temperature monitor board, display board, Power
On/Standby switch, and module cooling fan with
the power supply.
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