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98640A Analog Input Interface
SOURCE
$
SOURCE
-=-
FLOATING
=
SOURCE
x
0
~
'"
'~,
,
,
,
- OR +
CHANNEL "7
+OR -
GND TERMINAL
+
CHANNEL"7
GND TERMINAL
+
CHANNEL "7
GND TERMINAL
Figure 2-6. Unacceptable wiring of the inputs.
Be sure there is enough slack in the wires attached to the wire termination assembly to allow the as-
sembly to be pulled straight back. If there is not enough slack you will have to remove the wires or
release them from the strain relief.
Remove the assembly by unscrewing the two thumbscrews simultaneously to avoid binding caused by
the plate not coming off straight. Be prepared to support the wire termination assembly as the screws
run out. Pull the assembly straight back, away from the card cage, to avoid bending the the right-
angle posts on the A-to-D card.
Do not use the wire termination assembly to hang up your wire bundle. The weight of the wire may
cause damage to the assembly or the wires might slip out of the receptacles.
OPERA TIONAL CONSIDERA TIONS
The bottom of the wire termination assembly is exposed; do not allow conductors to come in contact
with the bottom of the assembly when it is installed. If the computer is turned on or there is a voltage
present on one of the channels, a short-circuit may result. The current through the short-circuit may
be enough to damage the voltage source or the metal traces on the wire termination assembly, or both.
If the traces on the wire termination assembly are damaged, you may purchase a replacement through
your Hewlett-Packard Sales and Service office or our Corporate Parts Center (CPC). The part number
is given in the description of the standard product in Section 1.
2-12
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