NI WSN-3214, User Manual And Specifications, Page: 43 / 53

© National Instruments 43 NI WSN-3214 User Guide and Specifications
Excitation
Excitation type ...............................................Voltage
Voltage ...........................................................2 V, ±0.85% maximum
Maximum current ..........................................6.4 mA
Maximum allowable lead resistance per lead wire
350
Ω
full-bridge ...........................................17
Ω
1 K
Ω
full-bridge ............................................50
Ω
350
Ω
half-bridge and quarter-bridge ............33
Ω
1 K
Ω
half-bridge and quarter-bridge .............90
Ω
Digital I/O
Number of channels ...............................................2
Power-on output state.............................................High impedance
DIO pin capacitance...............................................2,000 pF
Digital Input
Modes (configurable per channel) ......................... 24 V Sinking , 24 V Sinking with Power Management ,
TTL Logic , Contact Closure
Input voltage range ................................................3.3 to 24 VDC maximum
Filter: 60 Hz
High Rejection 30 30 30 30 0.08
Filter:
50/60 Hz
Low Power
27 27 27 27 0.08
Filter:
50 Hz/60 Hz
High Rejection
13 13 13 13 0.07
*
Samples per second.
Table 5. Normal Mode Rejection, Filter Characteristics
Filter Strength Filter Rejection
High rejection –60 dB at 50 and/or 60 Hz, ±1 Hz
Low power –30 dB at 50 and/or 60 Hz, ±1 Hz
Table 4.
Maximum Sampling Rate and Input Noise (Continued)
Measurement
Conditions
1 Channel
Sampling
Rate (SPS
*
)
2 Channel
Sampling
Rate (SPS)
3 Channel
Sampling
Rate (SPS)
4 Channel
Sampling
Rate (SPS)
Total Noise
(
μ
V /V
rms
)