All specifications are for 20 to 30 ˚C and for 1 year unless otherwise noted.

All specifications are relative to calibration standards and require a 15 minute warm-up period.

Specifications do not include transducer error.

Input Characteristics

Number of channels......................................... 8

Minimum recommended input frequency based on output filter setting

Minimum input pulse width............................. 1.5 µs (5 V pulse train at 128 kHz)

to ±250 V maximnum

Input coupling................................................... DC (AC with SCXI-1305 or TBX-1329)

or any other input terminal (signal + common mode voltage)

Inputs protected ............................................... CH<0..7>

Input impedance

Powered on................................................ 50 G

(-0.5 to 4.5 V)

Overload..................................................... 50 k

(-250 to -0.5 V and 4.5 to 250 V)

Powered off ...................................................... 50 k

Input bias current ............................................. 500 pA maximum (0 to 50˚)

Threshold (software programmable)

Range......................................................... -0.5 to 4.98 V (-50 to 250 V with

SCXI-1327 high-voltage terminal block)

Resolution.................................................. 8 bits

Hysteresis .................................................. 0 to 4.98 V (0 to 250 V with SCXI-1327 high- voltage

attenuator terminal block)

Output Characteristics

Output impedance

Multiplexed output mode.......................... 100

Parallel output mode ................................. 330

Output short circuit protection......................... Indefinite duration

Outputs protected ............................................ MCH<0..7>

Filters (software programmable)

Type .................................................................. 4-pole, active lowpass

Power-Up and Reset States

Bandwidth and Response Time

Stability

Recommended warm-up time.......................... 15 minutes

In ppm/˚C ................................................... ±9 ppm of reading/˚C ±6.4 ppm

In Hz/˚C of range/˚C

Calibration cycle............................................... 1 year

Physical

Dimensions....................................................... 3.0 by 17.2 by 20.3 cm

(1.2 by 6.8 by 8.0 in.)

I/O connectors .................................................. 50-pin male ribbon cable rear connector

32-pin male DIN C front I/O connector

Environment

Operating temperature..................................... 0 to 50 ˚C

Storage temperature ........................................ -20 to 70 ˚C

Relative humidity ............................................. 5 to 90% noncondensing

Certifications and Compliances

European Compliance

EMC ................................................................. EN 61326 Group I Class A, 10m, Table 1 Immunity

Safety .............................................................. EN 61010-1

North American Compliance

EMC ................................................................. FCC Part 15 Class A using CISPR

Safety ............................................................... UL Listed to UL 3111-1

CAN/CSA C22.2 No. 1010.1

of temperature drift over the range 20 to 30 ˚C

SCXI 8-Channel Isolated

Frequency Input Module

Specifications

Input Frequency Ranges

Output Voltage Range

250 Hz, 500 Hz, 1 kHz, 2 kHz

0 to 5 V

4 kHz, 8 kHz, 16 kHz, 32 kHz

64 kHz, 128 kHz

Input Frequency Ranges

Temperature Drift Percent of Reading/˚C + Hz/˚C

250 Hz

0.0009% ±0.002 Hz

500 Hz

0.0009% ±0.003 Hz

1 kHz

0.0009% ±0.006 Hz

2 kHz

0.0009% ±0.013 Hz

4 kHz

0.0009% ±0.026 Hz

8 kHz

0.0009% ±0.051 Hz

16 kHz

0.0009% ±0.102 Hz

32 kHz

0.0009% ±0.204 Hz

64 kHz

0.0009% ±0.407 Hz

128 kHz

0.0009% ±0.814 Hz

Output Filter Bandwidth Setting

Minimum Input Frequency

1 Hz

15 Hz

40 Hz

600 Hz

320 Hz

5 kHz

1000 Hz

15 kHz

Bandwidth

Step Response

Settling Time (ms)

Full Scale Input Step

(-3 dB) (Hz)

to ±1%

to ±0.1%

to ±0.024%

1.0

800.0

1,530.0

5,300.0

40.0

30.0

55.0

180.0

320.0

3.2

7.0

30.0

1000.0

0.8

1.0

1.2

Function

Power-Up State

Software Reset State

Hardware Reset State

Scanning mode*

Parallel

Retains last setting

Parallel

prior to software reset

DAQ device

DIFF

Retains last setting

DIFF

Connection mode*

prior to software reset

Input frequency range

0 to128 kHz

0 to128 kHz

0 to128 kHz

Filter setting

1 Hz

1 Hz

1 Hz

Threshold level

-0.5 V

-0.5 V

Retains last setting

prior to software reset

Hysteresis level

0 V

0 V

Retains last setting

prior to software reset

*Output modes

Input

Noise (Hz)

Frequency

(DC to 255 kHz)

Ranges

24 hours

90 days

1 year

peak

rms

250 Hz

0.0150% ± 0.011 Hz

0.0217% ± 0.018 Hz

0.0418% ± 0.039 Hz

0.05

0.008

500 Hz

0.0150% ± 0.023 Hz

0.0217% ± 0.036 Hz

0.0418% ± 0.077 Hz

0.10

0.015

1 kHz

0.0150% ± 0.045 Hz

0.0217% ± 0.073 Hz

0.0418% ± 0.154 Hz

0.20

0.030

2 kHz

0.0150% ± 0.091 Hz

0.0217% ± 0.145 Hz

0.0418% ± 0.308 Hz

0.40

0.061

4 kHz

0.0150% ± 0.181 Hz

0.0217% ± 0.290 Hz

0.0418% ± 0.616 Hz

0.8

0.121

8 kHz

0.0150% ± 0.363 Hz

0.0217% ± 0.580 Hz

0.0418% ± 1.231 Hz

1.60

0.242

16 kHz

0.0150% ± 0.726 Hz

0.0217% ± 1.160 Hz

0.0418% ± 2.462 Hz

3.20

0.485

32 kHz

0.0150% ± 1.451 Hz

0.0217% ± 2.319 Hz

0.0418% ± 4.924 Hz

6.40

0.970

64 kHz

0.0150% ± 2.902 Hz

0.0217% ± 4.638 Hz

0.0418% ± 9.848 Hz

12.80

1.939

128 kHz

0.0150% ± 5.803 Hz

0.0217% ± 9.276 Hz

0.0418% ± 16.696 Hz

25.60

3.879

*Accuracy

Scan Interval (Per Channel, Any Frequency Range and Filter Bandwidth)

Module

SCXI-1126

3 µs

10 µs

20 µs