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Appendix A 
Specifications
© National Instruments Corporation 
A-3 
SCXI-1122 User Manual
Excitation
Output Characteristics
Channels 
2 (1 voltage and 1 current)
Bridge type 
Quarter, half, or full
Bridge completion 
Two 2.5 k
Ω
 
±
0.02% ratio tolerance resistors
Voltage Mode
Level 
3.333 V 
±
0.04%
Current drive 
225 mA
Drift 
30 ppm/
°
C
Current Mode
Level 
1.0 mA 
±
0.04%
Max load resistance 
5 k
Ω
Drift 
40 ppm/
°
C
Physical
Dimensions 
3.0 by 17.3 by 20.3 cm (1.2 by 6.8 by 8.0 in.)
I/O connectors 
50-pin male ribbon cable rear connector
48-pin male DIN C front I/O connector
Environment
Operating temperature 
0 to 50
°
 C
Storage temperature 
-20 to 70 C
Relative humidity 
10% to 90%
Maximum altitude 
<2000 meters
Safety
Electrical Measuring and 
IEC/EN 61010-1, UL 3111-1,
Test Equipment                                         CAN/CSA C22.2, No. 1010.1
Installation Category 
Category II
Pollution degree 
2