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1261B User Manual
Racal Instruments
Ó
1995
Configuring The 1261B 2-1
Chapter 2
CONFIGURING THE 1261B
Using This
Chapter
This section includes procedures to install and configure the
1261B mainframe. Use this chapter to:
·
Review installation site considerations.
·
Install VXI modules, card guide covers, or optional blanking
plates.
·
Install the 1261B rack mount options, and install the
mainframe into an instrument rack.
·
Connect safety ground.
·
Re-configure fan speed range (HI - LO) setting.
·
Configure and connect to the optional Enhanced Monitoring
System (EMS) module.
AC Mains Power
The 1261B AC input is both auto-voltage and auto-frequency
ranging, and requires no voltage switch selection.
When the standard 1261B is shipped, it is configured for 120 VAC
operation. If Option 71 (P/N 407401) is ordered, the 1261B is
configured for 230 VAC operation. Should it be necessary to
replace the AC mains fuse (F400), refer to Chapter 7
Removal
and Replacement of The AC Mains Fuse
.
WARNING
For your protection from electrical shock when
operating at mains frequencies greater than 63Hz,
connect the chassis safety ground terminal to
permanent earth ground. See Figure 2-11.
Site
Considerations
The 1261B Mainframe is designed to operate on a bench or in an
instrument rack. If the bench top model is installed in a rack, allow
1.75 inches of clearance above the unit to permit the free flow of
air through the exhaust vents in the top cover. Refer to
Figures 1-
5
and
1-6
for vent locations for the 1261B bench top and rack
mount mainframe, respectively. Determine how you will use your
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