Feedthrough
Panels
Installing the
HP
3235
30
Feedthrough panels give you
the
ability
to
connect external
equipment
to
con-
nectors that can be mated
to
terminal blocks. Terminal blocks in a
Quick
Interconnect Fixture can then be interchanged rapidly without having
to
discon-
nect and reconnect
the
external equipment. Feedthrough panels
for
high
frequency signals
(HP 34593) have BNC connectors and
the
panels
for
low
frequency signals (HP 34594) have DIN connectors. Figure 20 shows a
BNC
and
Low Frequency Feedthrough Panel. This section shows
you
how
to wire and in-
stall both low and high
frequency
panels.
LOW
FREQUENCY
FEEDTHROUGH
PANEL
UPPER
_,_---MOUNTING
SCREW
LOWER
_,_
___
MOUNTING
SCREW
BNC
FEEDTHROUGH
PANEL
Figure
20.
Feedthrough Panels.
The
feedthrough panels
appear
as
if
thcv are plug-in modules since
they
each
take
the
space
of
one plug-in slot. Cables
for
BNC connectors
or
wires
for
DIN
connectors are routed
through
the
back
of
the
HP
3235 (system side)
and
into
the card cage through an access hole next
to
slot
000.
These cables
or
wires
con-
nect
to
the feedthrough panel
from
inside the
card
cage. A terminal block
with
field wiring
is
connected
to
the
fccdthrough panel
from
outside
the
HP
3235
(the terminal block could be installed in a Quick
Interconnect
Fixture).
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