NI SCXI-1127 User Manual page 32

Chapter 1 Installing and Configuring the SCXI-1127
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.
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.
Connections, including power signals to ground and vice versa, that exceed any of
the maximum signal ratings on the SCXI-1127 can damage any or all of the
modules connected to the SCXI chassis, the host computer, and the SCXI-1127
module. National Instruments is NOT LIABLE FOR ANY DAMAGES OR
INJURIES resulting from incorrect signal connections.
If high voltages ( ( ≥ ≥ 30 V
and 42.4 V , or 60 VDC) are present, YOU MUST
rms peak
CONNECT SAFETY EARTH GROUND TO THE STRAIN-RELIEF TAB OF
THE TERMINAL BLOCK. This maintains compliance with UL 3111 and
IEC-61010, 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.
Do not loosen or re-orient the safety ground solder lug hardware when connecting
the safety ground wire; to do so reduces the safety isolation between the high
voltage and safety ground.
© National Instruments Corporation 1-23 SCXI-1127 User Manual