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Chapter 1
Installing and Configuring the SCXI-1127/1128
1-24
ni.com
To remove a module or chassis, right-click the chassis or module you want 
to remove and select Delete.
To test the chassis configuration, right-click the chassis and select Test.
Safety Information
The following cautions contain important safety information concerning 
hazardous voltages.
Cautions
You must insulate all of your signal connections appropriately to the highest 
available voltage with which the SCXI-1127/1128 may come in contact. Any voltage 
connected to the SCXI-1127/1128 connector may appear on any other pin of this 
connector.
Equipment described in this document must be used in an Installation Category II or lower 
environment per IEC 60664.
Do not operate the module in an explosive atmosphere or where there may be flammable 
gases or fumes.
SHOCK HAZARD—This unit should only be opened by qualified personnel aware of the 
dangers involved. Disconnect all power before removing the cover. Always install the 
grounding screw. If signal wires are connected to the module or terminal block, dangerous 
voltages may exist even when the equipment is turned off. Before you remove any installed 
terminal block or module, disconnect the AC power line or any high-voltage sources, 
(
≥ 30 V
rms
 and 42.4 V
peak
, or 60 VDC), that may be connected to any terminal block or 
module.
Do not operate damaged equipment. The safety-protection features built into this module 
can be impaired if the module becomes damaged in any way. If it is damaged, turn the 
module off and do not use it until service-trained personnel can check its safety. If 
necessary, return the module to National Instruments for service and repair to ensure that 
its safety is not compromised.
Clean the module and accessories by brushing off light dust with a soft non metallic brush. 
Remove other contaminants with a stiff non metallic brush. The unit must be completely 
dry and free from contaminants before returning it to service.
The module must be used in a UL-listed SCXI chassis.
Do not substitute or modify equipment. Because of the danger of introducing additional 
hazards, do not install unauthorized parts or modify the module. Return the module to