National Instruments SCXI -1122 - Manual (Page 24)

Signal Connections Chapter 3
SCXI-1122 User Manual 3-2 © National Instruments Corporation
Connections, including power signals to ground and vice versa, that exceed any
of the maximum signal ratings on the SCXI-1122 can damage any or all of the
boards connected to the SCXI chassis, the host computer, and the SCXI-1122
module. National Instruments is
NOT LIABLE FOR ANY DAMAGES OR INJURIES
resulting from incorrect signal connections.
If high voltages (
≥
30 Vrms, 42.4 Vpk or 60 Vdc) are present, YOU MUST
CONNECT SAFETY EARTH GROUND TO THE STRAIN - RELIEF TAB OF THE
TERMINAL BLOCK . This maintains compliance with UL and CE, and protects
against electric shock when the terminal block is not connected to the chassis.
To connect the safety earth ground to the strain-relief tab, run an earth ground
wire in the cable from the signal source to the terminal block. National
Instruments is
NOT liable for any damages or injuries resulting from inadequate
safety earth ground connections.
To comply with UL and CE requirements, use this module only with a UL listed
SCXI chassis.
Clean devices and terminal blocks by brushing off light dust with a soft,
nonmetallic brush. Remove other contaminants with deionized water and a stiff
nonmetallic brush. The unit must be completely dry and free from contaminants
before returning to service.
Caution: Static electricity is a major cause of component failure. To prevent damage to the
electrical components in the module, observe antistatic techniques whenever
removing a module from the mainframe or whenever working on a module.