©
National Instruments Corporation
3
NI SCXI-1339 Installation Instructions
❑
Long-nose pliers
❑
Wire cutter
❑
Wire insulation stripper
3. Connect Signals
To connect the signal(s) to the terminal block, refer to Figures 1 and 2
while completing the following steps:
Caution
This module is rated for Measurement Category I and intended to carry signal
voltages no greater than 150 V. This module can withstand up to 800 V impulse voltage.
Do not use this module for connection to signals or for measurements within Categories II,
III, or IV. Do not connect to MAINS supply circuits (for example, wall outlets) of 115 or
230 VAC. Refer to the
NI Switches Getting Started Guide
for more information on
measurement categories.
When hazardous voltages (>42.4 V
pk
/60 VDC) are present on any relay terminal, safety
low-voltage (
≤
42.4 V
pk
/60 VDC) cannot be connected to any other relay terminal.
1.
Prepare the signal wire by stripping the insulation no more than 7 mm
from the end of the wire.
2.
Remove the top cover screw.
3.
Unsnap and remove the top cover.
4.
Loosen the two strain-relief screws on the strain-relief bar.
5.
Run the signal wires through the strain-relief opening.
6.
Insert the stripped end of the wire fully into the terminal. Secure the
wire by tightening the screw of the terminal. No bare wire should
extend past the screw terminal. Exposed wire increases the risk of a
short-circuit causing a failure.
7.
Connect the safety earth ground to the safety ground lug.
8.
Tighten the two screws on the strain-relief assembly to secure the
cables.
9.
Reinstall the top cover.
10. Replace the top cover screw.
