Input Characteristics

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

Input signal ranges

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

Maximum working voltage (without SCXI-1313, 1327, or TBX-1316)

Overvoltage protection

Inputs protected ............................................... CH0..CH7

Transfer Characteristics

Nonlinearity

Offset error ....................................................... See accuracy table

Gain error ......................................................... See accuracy table

Amplifier Characteristics

Input impedance

Input bias current

SCXI-1125......................................................... ±100 pA

SCXI-1120......................................................... ±80 pA

SCXI-1120D ...................................................... ±15 pA

NMR (Normal Mode Rejection Ratio)

SCXI-1125/1120/1120D ................................... 60 dB

CMRR (Common Mode Rejection Ratio) (DC to 60 Hz)

Output range .................................................... ± 5 V

Output impedance

1

2

With SCXI-1327 high-voltage terminal block.

3

With SCXI-1313 high-voltage terminal block.

4

With TBX-1316 high-voltage terminal block.

5

Includes effects of AT-MIO-16E-2 with 1 or 2 m SCXI cable assembly.

6

Includes effects of AT-MIO-16X or AT-AI-16XE-10 with 1 or 2 m SCXI cable assembly.

Dynamic Characteristics

Input signal bandwidth

Multiplexer performance

System noise .................................................... See accuracy table

Filter type

SCXI-1125......................................................... Third-order Butterworth

SCXI-1120, SCXI-1120D ................................... Third order RC

Cutoff frequency (-3dB)

SCXI-1125......................................................... 4 Hz, 10 kHz (programmable)

SCXI-1120......................................................... 4 Hz, 10 kHz (jumper selectable)

SCXI-1120D ...................................................... 4.5 kHz, 22.5 kHz (jumper selectable)

Stability

Physical

Dimensions....................................................... 3.1 by 17.3 by 20.3 cm

(12.2 by 6.8 by 8.0 in)

I/O Connector

Rear ................................................................. 50-pin male ribbon cable rear connector

Front ................................................................. 32-pin male DIN C connector

Environment

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

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

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

Certification and Compliance

SCXI-1120/D..................................................... 250 V, Cat II working voltage

SCXI-1125......................................................... 300 V, Cat II working voltage

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

Australia & New Zealand Compliance

EMC ................................................................. AS/NZS 2064.1/2 (CISPR-11)

SCXI 8-Channel Isolated Analog Input Modules

299

National Instruments • Tel: (800) 433-3488 • Fax: (512) 683-9300 • info@ni.com • ni.com

Specifications

Module

Signal and Common Mode

SCXI-1125

SCXI-1120, SCXI-1120D

Module

Signal Ranges

SCXI-1125

±2.5 mV to ±5 V

SCXI-1120

±2.5 mV to ±5 V

SCXI-1120D

±5 mV to ±10 V

Module

Percent of Full Scale Range

SCXI-1125

±0.02%

SCXI-1120, SCXI-1120D

±0.04%

Module

Powered On

Powered Off

SCXI-1125

SCXI-1120, SCXI-1120D

Module

Normal Powered On

Powered Off/Overload

SCXI-1125

> 1 G

4.5 M

SCXI-1120

> 1 G

50 k

SCXI-1120D

> 1 M

500 k

Module

Filter

CMRR 50 or 60 Hz

SCXI-1125

4 Hz

160 dB

10 kHz

100 dB

SCXI-1120

4 Hz

160 dB

10 kHz

100 dB

SCXI-1120D

4.5 kHz

110 dB

10 kHz

98 dB

Module

Filter

Input Range

Bandwidth

SCXI-1125

4 Hz

All ranges

4 Hz

SCXI-1120

10 kHz

All ranges

10 kHz

SCXI-1125/1120

All ranges

2.6 kHz

SCXI-1125/1120

All ranges

500 Hz

SCXI-1120D

4.5 kHz

± 250 V to ± 50 mV

4.5 kHz

± 20 mV to ± 10 mV

4 kHz

±5 mV

3.5 kHz

22.5 kHz

± 250 V to ± 1 V

22.5 kHz

± 50 mV to ± 20 mV

22 kHz

± 10 V to ± 50 mV

20 kHz

± 10 mV

17 kHz

±5 mV

14 kHz

Scan Interval (Per Channel, Any Gain and Filter Setting)

Module

SCXI-1125

3 µs

10 µs

20 µs

SCXI-1120

SCXI-1120D

Module

Gain Temperature Coefficient

Offset Coefficient

SCXI-1125

20 ppm/°C

± 0.2 ± 220/gain) µV/°C

SCXI-1120

20 ppm/°C

± .42 ± 250/gain) µV/°C

SCXI-1120D

50 ppm/°C

± 20 ± 220/gain) µV/°C

Module

Multiplexed Mode

Parallel Mode

SCXI-1125, SCXI-1120, SCXI-1120D

100

330