Chapter 2
Configuration and Installation
© National Instruments Corporation
2-13
SCXI-1162 User Manual
Ω
24 V
+
_
1.5 k
1
2
Watt
360
SCXI-1162
Vcc
In
Switch
_
Ω
Load
Figure 2-4. Adding Series Resistance
Terminal Block
A terminal block with screw terminals is available for easy signal connection to the SCXI-1162
inputs. This kit is listed in the Optional Equipment section in Chapter 1, Introduction.
SCXI-1326 Terminal Block
The SCXI-1326 terminal block consists of a shielded board with supports to connect it to the
SCXI-1162 input connector. The SCXI-1326 has 48 screw terminals for easy signal connection.
When connecting your signals to the SCXI-1326 for use with the SCXI-1162, follow the labeling
as indicated in Figure 2-5, SCXI-1326 Parts Locator Diagram.
The following warnings contain important safety information concerning hazardous voltages.
Warnings: •
When using the terminal block with high common-mode voltages, your signal
wires must be insulated 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, the lines must be powered off to avoid shock hazard.
•
Connections, including power signals to ground and vice versa, that exceed any
of the maximum signal ratings on the SCXI-1162 can result in damage to any or
all of the boards connected to the SCXI chassis, to the host computer, and to the
SCXI-1162 module. National Instruments is not liable for any damages or
injuries resulting from incorrect signal connections.
•
If high voltages (
≥
42 Vrms) are present, the safety earth ground must be
connected 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.
