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©
National Instruments Corporation
2-1
2
NI 2565 Operation
This chapter contains safety instructions and a functional overview of
the NI 2565 switch card, and explains the operation of each functional
unit making up the switch card.
Safety Instructions
Caution
Do
NOT
OPERATE
THIS
INSTRUMENT
IN
AN
EXPLOSIVE
ATMOSPHERE
OR
WHERE
THERE
MAY
BE
FLAMMABLE
GASES
OR
FUMES
.
Equipment described in this document must be used in an Installation Category
II environment per IEC 664. This category requires local level supply
mains-connected installation.
To prevent safety hazards, the maximum voltage between any of the channel
inputs and the ground of the computer should never exceed ±250 VDC
or 250 V
rms
.
D
O
NOT
OPERATE
DAMAGED
EQUIPMENT
. The safety protection features built into this
instrument can become impaired if the instrument becomes damaged in any way.
If the instrument is damaged, do not use it until service-trained personnel can
check its safety. If necessary, return the instrument to National Instruments for
service and repair to ensure that its safety is not compromised.
Do not operate this instrument in a manner that contradicts the information
specified in this document. Misuse of this instrument could result in a shock
hazard.
D
O
NOT
SUBSTITUTE
PARTS
OR
MODIFY
EQUIPMENT
beyond what is described in
Appendix B,
. Because of the danger of introducing
additional hazards, do not install unauthorized parts or modify the instrument.
Return the instrument to National Instruments for service and repair to ensure
that its safety is not compromised.
Connections that exceed any of the maximum signal ratings on the NI 2565 can
create a shock or fire hazard or can damage any or all of the devices connected to
!