Front Panel Features - HP E8400A C-Size VXI Mainframe User And Service Manual

Front Panel Features

Table 1-1. HP E8400A Mainframe Front Panel Indicators and Switches.
Section Indicator / Switch
Input Power On Indicator
Power Supply Voltages Indicator
Temp Indicator
Fans Fan Switch
Fans Indicator
Backplane Activity Indicator
SYSFAIL Indicator
Reset Switch
10 Using the HP E8400A Mainframe
The HP E8400A front panel allows you to monitor power supply voltages,
mainframe temperatures, fan operation, and communication across the
backplane. Table 1-1 describes these features.
Green - the mainframe is turned on.
Off - there is no power applied to the mainframe. The mainframe is turned off
but may be plugged into an AC power source.
Green - all voltages on the VXI backplane are within ±8% of the VXI
specification.
Flashing Amber - one or more voltages is out of specification. The backplane
voltages and allowed variations are listed below:
Voltage
+5V
+12V +11.64V to +12.6V
-12V
+24V +23.28V to +25.2V
-24V
-5.2V
-2V
Green - the power supply temperature is acceptable.
Flashing Amber - the power supply is approaching thermal shutdown. The
power supply temperature can be measured on pin 11 of the Diagnostic
connector.
Full - the power supply and mainframe cooling fans are operating at full
speed.
Var(iable) - the power supply and mainframe cooling fans are providing
adequate cooling (default setting). Fan speed is a function of the power
supply temperature and the reference temperature (Diagnostic connector pin
12). The reference temperature is a function of ambient temperature and
load.
Green - the power supply and mainframe cooling fans are operating.
Flashing Amber - the power supply fan or the mainframe cooling fan is not
operating. Fan operation can be checked using pin 13 of the Diagnostic
connector.
Green - there is communication between instruments across the backplane.
Off - there is no communication between instruments on the backplane.
Flashing Amber - one or more instruments has asserted its SYSFAIL line due
to a power-on initialization failure, self-test failure, or hardware failure.
SYSFAIL is asserted momentarily at power on and during a system reset.
Resets all installed instruments to their power-on states.
Description
Allowed Variation
+4.875V to +5.125V
-12.6V to -11.64V
-25.2V to -23.28V
-5.46V to -5.044V
-2.1V to -1.9V
Diagnostic Pin
1
14
2
15
3
16
4
Chapter 1