Signal Connection - National Instruments SCXI-1163 User Manual

Configuration and Installation
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.
When connecting or disconnecting signal lines to the SCXI-1326 terminal block
screw terminals, make sure the lines are powered off to prevent shock hazard.
Connections, including power signals to ground and vice versa, that exceed any of
the maximum signal ratings on the SCXI-1163 can damage any or all of the
boards connected to the SCXI chassis, the host computer, and the SCXI-1163
module. National Instruments is not liable for any damages or injuries resulting
from incorrect signal connections.

Signal Connection

To connect the signal to the terminal block, use the following procedure:
1. Remove the grounding screw of the top cover.
2. Snap out the top cover of the shield by placing a screwdriver in the groove at the bottom of
the terminal block.
3. Slide the signal wires one at a time through the front panel strain relief. You can add
insulation or padding if necessary.
4. Connect the wires to the screw terminals, making sure you connect a Vcc and a ground to
every port you use.
5. Tighten the strain relief by tightening the larger screws.
6. Snap the top cover back in place.
7. Replace the grounding screw to ensure proper shielding.
9. Connect the terminal block to the SCXI-1163 front connector as explained in the
Installation section, the next section in this chapter.
Figure 2-3 shows a parts locator diagram for the SCXI-1326 terminal block.
Warning: If high voltages ( 42 Vrms) are present, you must connect the safety earth ground
to the strain relief tab. This complies with UL 1244 and fully 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.
SCXI-1163 User Manual 2-12 © National Instruments Corporation
Chapter 2
SCXI-1326