NI USB-9421 User Guide and Specifications
10
ni.com
Wiring the NI USB-9421 Device
Caution
A high voltage screw terminal backshell must be installed when using hazardous
voltages (>42.4 V
pk
, 60 VDC).
Note
Table 2 illustrates the accessories available from
ni.com
for use with the
NI USB-9421.
Table 1.
LED State/Device Status
LED State
Device Status
Not lit
Device not connected or in suspend.
On, not blinking
Device connected, but no module installed.
Single-blink
Operating normally.
Double-blink
Operating normally.
Quadruple-blink
Device error. Refer to
ni.com/support
.
Table 2.
Accessories
Device
Accessory
Accessory Description
USB-9421 with Screw Terminal
NI 9932
10-terminal, detachable, high
voltage, screw terminal backshell
1
USB-9421 with 25-pin D-SUB
NI 9934
25-pin D-SUB connector
1
For more information about installing the backshell, refer to the
Assembling the High Voltage Screw Terminal Backshell
section.
