© National Instruments Corporation
3
SCXI-1324 Installation Guide
Do not substitute parts or modify equipment. Because of the danger of introducing
additional hazards, do not install unauthorized parts or modify the device. Return the
device to National Instruments for service and repair to ensure that its safety features are
not compromised.
When using the device with high common-mode voltages, you must insulate your signal
wires for the highest input voltage. National Instruments is not liable for any damages or
injuries resulting from inadequate signal wire insulation. Use only 26-14 AWG wire with
a rating of 300 V and 60 °C for signals that may come in contact with 250 V.
When connecting or disconnecting signal lines to or from the SCXI terminal block screw
terminals, make sure the lines are powered off. Potential differences between the lines and
the SCXI ground create a shock hazard while you connect the lines.
Connections, including power signals to ground and vice versa, that exceed any of the
maximum signal ratings on the SCXI device can create a shock or fire hazard or can
damage any or all devices connected to the SCXI chassis, the host computer, and the SCXI
device. National Instruments is not liable for any damages or injuries resulting from
incorrect signal connections.
If high voltages (
≥
30 V
rms
and 42.4 V
peak
or ±60 VDC) are present, you must connect a
safety earth ground wire to the terminal block safety ground solder lug, shown in Figure 1.
This complies with safety agency requirements and protects against electric shock when
the terminal block is not connected to the chassis. To connect the safety earth ground to the
safety ground solder lug, 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.
Connecting Signal Wires to the Terminal Block
Note
section before removing equipment covers or
connecting or disconnecting any signal wires.
When connecting your signals to the SCXI-1324, follow the labeling on the
SCXI-1324 as indicated in Figure 2.
To connect the signal to the terminal block, perform the following steps,
referring to Figures 1 and 2 as necessary:
1.
Unscrew the top cover screws and remove the cover.
2.
Loosen the strain-relief screws and remove the strain-relief bar.
3.
Run the signal wires through the strain-relief opening. You can add
insulation or padding if necessary.
Summary of Contents for SCXI-1324
Page 9: ......
