Switch/Load Unit and Plug-In Cards 3
E6198B Switch/Load Unit User Manual 3-15
J803 provides the sense connections for the four power
busses.
Backplane LEDs
Two sets of LEDs are provided on the backplane for a visual
indication that the Switch/Load Unit is functioning:
Power LEDs. The +5V, +12V and -12V LEDs indicate the status
of the corresponding voltage lines from the Switch/Load Unit
power supply and READY LED indicate the status of SLU ready
to operate. If one or more LEDs is NOT illuminated, the most
likely problem was an overcurrent situation that opened the
non-resettable fuse(s). To change fuse(s), remove power from
the Switch/Load Unit for approximately 20 seconds. The fuse(s)
will reset when power is re-applied. The same +5V, +12V, -12V
and READY LEDs are present on the frontpanel of the SLU.
Frame LEDs. The Frame Access LED flashes to indicate a data
access has occurred to that Switch/Load Unit. The five Slot
Address LEDs indicate the slot currently being addressed.
J102 Pinouts
Switch/Load Unit backplane connector J102 carries such
signals as the Digital I/O, DAC 1 and 2, and the ISense (current
sense) lines. When configured as part of a standard Agilent
system, J102 of the Switch/Load Unit is connected via cable to a
mass interconnect panel. User connections to the UUT are then
made from the mass interconnect panel. Refer to the
appropriate mass interconnect wiring guide for connection
details.
You can also make connections directly to J102 or to the
exposed end of an Agilent E3750-61607 or Agilent E6170-61610
cable connected to J102. Figure 3-9 is a J102 connector pinout
and Figure 3-10 shows the pinouts for the exposed cable
connector end. Table 3-6 defines the signals available on J102.
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