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1261B User Manual
Racal Instruments
Ó
1995
Understanding The 1261B 6-3
Power Supply
Protections
The seven VXIbus power supply outputs are protected for:
Over-voltage
C
Over-current
C
Over-temperature
The AC input of the power supply includes protections for:
C
Input current limit (15 Amps)
C
Over-temperature
See
Appendix A
for specification details pertaining to the above
protections. If any of the above protections are active, the power
supply is 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
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 from slot 0 to slot 12.
C
Connects the VXI extensions across P2 rows a and
c from slot 0 to slot 12.
C
Connects the monitoring system module,
temperature monitor board, display board, Power
On/Standby switch, and module cooling fans with
the power supply.
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