Chapter 2
Configuration and Installation
©
National Instruments Corporation
2-11
Excitation Level
Each excitation channel of your SCXI-1121 has two different current or
voltage levels. You can set a given channel to one of the following level
modes:
•
In the Current mode
0.150 or 0.450 mA
•
In the Voltage mode
3.333 or 10 V
It is important to notice that you should select the level of excitation
according to the load you are using. Table 2-7 lists the maximum load that
can be driven per channel at each level of excitation for both volt and
current excitation.
Table 2-6.
Voltage and Current Mode Excitation Jumper Setup
Excitation
Channel
Jumpers
Voltage Mode
(Factory Setting)
Current Mode
0
W14 and W15
1
W22 and W23
2
W34 and W35
3
W46 and W47
Table 2-7.
Maximum Load per Excitation Channel
Excitation Level
Maximum Load
3.333 V
28 mA
10 V
14 mA
•
•
•
W14
1 2 3
•
•
•
W15
1 2 3
•
•
•
W14
1 2 3
•
•
•
W15
1 2 3
•
•
•
W22
1 2 3
•
•
•
W23
1 2 3
•
•
•
W22
1 2 3
•
•
•
W23
1 2 3
•
•
•
W34
1 2 3
•
•
•
W35
1 2 3
•
•
•
W34
1 2 3
•
•
•
W35
1 2 3
•
•
•
W46
1 2 3
•
•
•
W47
1 2 3
•
•
•
W46
1 2 3
•
•
•
W47
1 2 3