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© National Instruments Corporation 3-1 SCXI-1122 User Manual
Chapter 3
Signal Connections
This chapter describes the input and output signal connections to the SCXI-1122 module via the
SCXI-1122 front connector and rear signal connector. This chapter also includes specifications
and connection instructions for the signals on the SCXI-1122 connectors.
The following warnings contain important safety information concerning hazardous voltages.
Warnings: You MUST insulate all of your signal connections appropriately to the HIGHEST
available voltage with which the SCXI-1122 may come in contact. ANY voltage
connected to the SCXI-1122 connector may appear on any other pin of this
connector. Treat all signals on the SCXI-1122 front connector as hazardous if
any signals on the front connector are greater than or equal to 30 Vrms, 42.4
Vpk or 60 Vdc.
D
O 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
Vrms, 42.4 Vpk or 60 VDC) that may be connected to the terminal block or
module.
D
O 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.
D
O NOT SUBSTITUTE PARTS OR MODIFY EQUIPMENT. Because of the danger of
introducing additional hazards, do not install unauthorized parts or modify the
module. Return the module to National Instruments for service and repair to
ensure that its safety features are not compromised.
Do not operate this equipment in a manner that contradicts the information
specified in this document. Misuse of this equipment could result in a shock
hazzard.
When using the terminal block with high common-mode voltages, you
MUST
insulate your signal wires appropriately. National Instruments is NOT liable for
any damages or injuries resulting from inadequate signal wire insulation.