Product Descriptions

NI-9375: 30 V, 32-Channel (Sinking Input, Sourcing Output), 7 µs (Input)/500 µs (Output) C Series Digital Module

NI-9401: 5 V/TTL, 8 Bidirectional Channels, 100 ns C Series Digital Module

NI-9402: LVTTL, 4 Bidirectional Channels, 55 ns C Series Digital Module

NI-9403: 5 V/TTL, 32 Bidirectional Channels, 7 µs C Series Digital Module

NI-9411: ±5 V to 24 V, 6 Differential/Single-Ended Channels, 500 ns C Series Digital Module

NI-9421: 24 V, 8-Channel (Sinking Input), 100 µs C Series Digital Module

NI-9423: 24 V, 8 Channel (Sinking Input), 1 µs C Series Digital Module

NI-9425: 24 V, 32-Channel (Sinking Input), 7 µs C Series Digital Module

NI-9426: 24 V, 32 Channel (Sourcing Input), 7 µs C Series Digital Module

NI-9470: 5 VDC to 30 VDC, 8-Channel (Sourcing Output), 2 kHz C Series Digital Module

NI-9472: 24 V, 8-Channel (Sourcing Output), 100 µs C Series Digital Module

NI-9474: 30 V, 8-Channel (Sourcing Output), 1 µs C Series Digital Module

NI-9475: 60 V, 8-Channel (Sourcing Output), 1 µs C Series Digital Module

NI-9476: 36 V, 32-Channel (Sourcing Output), 500 µs C Series Digital Module

NI-9477: 60 V, 32-Channel (Sinking Output), 8 µs C Series Digital Module

NI-9478: 50 V, 16-Channel (Sinking Output), 50 µs C Series Digital Module

Physical Characteristics

Weight

NI-9375 with push-in spring terminal

164 g (5.8 oz)

NI-9375 with spring terminal

159 g (5.6 oz)

NI-9375 with DSUB

148 g (5.3 oz)

NI-9401 with DSUB

145 g (5.1 oz)

NI-9402 with BNC

199 g (6.9 oz)

NI-9403 with DSUB

150 g (5.3 oz)

NI-9411

136 g (4.8 oz)

NI-9421 with screw terminal

166 g (5.9 oz)

NI-9421 with spring terminal

153 g (5.4 oz)

NI-9421 with DSUB

144 g (5.0 oz)

NI-9423 with screw terminal

150 g (5.3 oz)

NI-9423 with spring terminal

145 g (5.1 oz)

NI-9425 with spring terminal

163 g (5.7 oz)

NI-9425 with DSUB

147 g (5.2 oz)

NI-9426 with DSUB

147 g (5.2 oz)

NI-9470 with Ultra-Fit

140 g (4.9 oz)

NI-9472 with screw terminal

150 g (5.3 oz)

NI-9472 with spring terminal

139 g (4.9 oz)

NI-9472 with DSUB

145 g (5.1 oz)

NI-9474 with screw terminal

150 g (5.3 oz)

NI-9474 with spring terminal

139 g (4.9 oz)

NI-9475 with DSUB

142 g (4.9 oz)

NI-9476 with spring terminal

167 g (5.9 oz)

NI-9476 with DSUB

147 g (5.2 oz)

NI-9477 with DSUB

145 g (5.1 oz)

NI-9478 with DSUB

148 g (5.2 oz)

Dimensions

Visit ni.com/dimensions and search by module number.

Note Some NI C Series modules offer two types of spring terminal connectors: push-in spring terminal and spring terminal. The black/orange push-in spring terminal connectors do not require a tool for signal connection; push the wire into the terminal when using solid wire or stranded wire with a ferrule, or by pressing the push button when using stranded wire without a ferrule. The black spring terminal connectors require a flathead screwdriver with a 2.3 mm × 1.0 mm (0.09 in. × 0.04 in.) blade for signal connection; insert the screwdriver into a spring clamp activation slot to open the corresponding connector terminal, press a wire into the open connector terminal, and then remove the screwdriver from the activation slot to clamp the wire into place.

NI-9375 with Push-In Spring Terminal (Black/Orange Connector)

Spring terminal wiring

Gauge

0.14 mm2 to 1.5 mm2 (26 AWG to 16 AWG) copper conductor wire

Wire strip length

10 mm (0.394 in.) of insulation stripped from the end

Temperature rating

90 °C, minimum

Wires per spring terminal

One wire per spring terminal; two wires per spring terminal using a 2-wire ferrule

Ferrules

Single ferrule, uninsulated

0.13 mm2 to 1.5 mm2 (26 AWG to 16 AWG) 10 mm barrel length

Single ferrule, insulated

0.13 mm2 to 1.0 mm2 (26 AWG to 18 AWG) 12 mm barrel length

Two-wire ferrule, insulated

2x 0.34 mm2 (2x 22 AWG) 12 mm barrel length

Connector securement

Securement type

Screw flanges provided

Torque for screw flanges

0.2 N · m (1.80 lb · in.)

NI-9375 with Spring Terminal (Black Connector)

Spring terminal wiring

Gauge

0.08 mm2 to 1.0 mm2 (28 AWG to 18 AWG) copper conductor wire

Wire strip length

7 mm (0.28 in.) of insulation stripped from the end

Temperature rating

90 °C, minimum

Wires per spring terminal

One wire per spring terminal

Connector securement

Securement type

Screw flanges provided

Torque for screw flanges

0.2 N · m (1.80 lb · in.)

NI-9402

Cable

50 Ω BNC

Cable length

2 m maximum

NI-9411

Screw terminal wiring (Vsup)

Gauge

0.05 mm2 to 1.5 mm2 (30 AWG to 14 AWG) copper conductor wire

Wire strip length

6 mm (0.24 in.) of insulation stripped from the end

Temperature rating

90 °C, minimum

Torque for screw terminals

0.22 N · m to 0.25 N · m(1.95 lb · in. to 2.21 lb · in.)

Wires per screw terminal

One wire per screw terminal; two wires per screw terminal using a 2-wire ferrule

Ferrules

0.25 mm2 to 1.5 mm2

Connector securement

Securement type

Screw flanges provided

Torque for screw flanges

0.2 N · m (1.80 lb · in.)

NI-9421 with Screw Terminal, NI-9423 with Screw Terminal

Screw terminal wiring

Gauge

0.2 mm2 to 2.5 mm2 (26 AWG to 14 AWG) copper conductor wire

Wire strip length

13 mm (0.51 in.) of insulation stripped from the end

Temperature rating

90 °C, minimum

Torque for screw terminals

0.5 N · m to 0.6 N · m(4.4 lb · in. to 5.3 lb · in.)

Wires per screw terminal

One wire per screw terminal; two wires per screw terminal using a 2-wire ferrule

Connector securement

Securement type

Screw flanges provided

Torque for screw flanges

0.2 N · m (1.80 lb · in.)

NI-9421 with Spring Terminal, NI-9423 with Spring Terminal

Spring terminal wiring

Gauge

0.2 mm2 to 2.5 mm2 (30 AWG to 12 AWG) copper conductor wire

Wire strip length

10 mm (0.39 in.) of insulation stripped from the end

Temperature rating

90 °C, minimum

Wires per spring terminal

One wire per spring terminal; two wires per spring terminal using a 2-wire ferrule

Connector securement

Securement type

Screw flanges provided

Torque for screw flanges

0.2 N · m (1.80 lb · in.)

NI-9425 with Spring Terminal, NI-9476 with Spring Terminal

Spring terminal wiring

Gauge

0.14 mm2 to 1.5 mm2 (26 AWG to 16 AWG) copper conductor wire

Wire strip length

10 mm (0.394 in.) of insulation stripped from the end

Temperature rating

90 °C, minimum

Wires per spring terminal

One wire per spring terminal; two wires per spring terminal using a 2-wire ferrule

Ferrules

0.14 mm2 to 1.5 mm2

Connector securement

Securement type

Screw flanges provided

Torque for screw flanges

0.2 N · m (1.80 lb · in.)

NI-9470 with Ultra-Fit

I/O plug type

Molex Ultra-Fit, part number 1722583116

Crimp terminal

18 AWG to 16 AWG

Molex Ultra-Fit, part number 1722536012

22 AWG to 20 AWG

Molex Ultra-Fit, part number 1722536112

Wire gauge

22 AWG to 16 AWG

NI-9472 with Screw Terminal, NI-9474 with Screw Terminal

Screw terminal wiring

Gauge

0.2 mm2 to 2.5 mm2 (26 AWG to 14 AWG) copper conductor wire

Wire strip length

13 mm (0.51 in.) of insulation stripped from the end

Temperature rating

90 °C, minimum

Torque for screw terminals

0.5 N · m to 0.6 N · m(4.4 lb · in. to 5.3 lb · in.)

Wires per screw terminal

One wire per screw terminal; two wires per screw terminal using a 2-wire ferrule

Ferrules

0.25 mm2 to 2.5 mm2

Connector securement

Securement type

Screw flanges provided

Torque for screw flanges

0.2 N · m (1.80 lb · in.)

NI-9472 with Spring Terminal, NI-9474 with Spring Terminal

Spring terminal wiring

Gauge

0.2 mm2 to 2.5 mm2 (30 AWG to 12 AWG) copper conductor wire

Wire strip length

10 mm (0.39 in.) of insulation stripped from the end

Temperature rating

90 °C, minimum

Wires per screw terminal

One wire per screw terminal; two wires per screw terminal using a 2-wire ferrule

Ferrules

0.25 mm2 to 2.5 mm2

Connector securement

Securement type

Screw flanges provided

Torque for screw flanges

0.2 N · m (1.80 lb · in.)

Environmental

Refer to the manual for the chassis you are using for more information about meeting these specifications.

Operating temperature

-40 °C to 70 °C

Storage temperature

-40 °C to 85 °C

Ingress protection

IP40

Operating humidity

10% RH to 90% RH, noncondensing

Storage humidity

5% RH to 95% RH, noncondensing

Pollution Degree

2

Maximum altitude

NI-9375 with push-in spring terminal

5,000 m

NI-9375 with spring terminal

2,000 m

NI-9375 with DSUB

5,000 m

NI-9401

2,000 m

NI-9402

2,000 m

NI-9403

5,000 m

NI-9411

2,000 m

NI-9421

2,000 m

NI-9423

2,000 m

NI-9425

5,000 m

NI-9426

2,000 m

NI-9470

5,000 m

NI-9472

2,000 m

NI-9474

2,000 m

NI-9475

2,000 m

NI-9476 with spring terminal

5,000 m

NI-9476 with DSUB

2,000 m

NI-9477

2,000 m

NI-9478

2,000 m

Indoor use only.

Hazardous Locations

Explosive atmospheres rating

Ex ec IIC T4 Gc

CCC certificate number

2021312310000312

Safety Guidelines for Hazardous Voltages (Screw Terminal and Spring Terminal Products)

If hazardous voltages are connected to the device, take the following precautions. A hazardous voltage is a voltage greater than 42.4 V peak voltage or 60 V DC to earth ground.

You may connect signals which may be floating at hazardous voltages only to the products with screw terminal or spring terminal connectors. Do not connect hazardous voltages to the NI-9375, NI-9470, or to products with DSUB or BNC connectors.

Caution Ensure that hazardous voltage wiring is performed only by qualified personnel adhering to local electrical standards.
Caution All wiring must be insulated for the highest voltage used.
Caution Do not mix hazardous voltage circuits and human-accessible circuits on the same module.
Caution Ensure that devices and circuits connected to the module are properly insulated from human contact.
Caution (NI-9421/9423) You must use the NI-9927 connector backshell to ensure that the terminals are not accessible.
Caution (NI-9472/9474) You must use the NI-9927 connector backshell kit with the product with screw terminal and the NI-9981 connector backshell kit with the product with spring terminal to ensure that the terminals are not accessible.

Safety Guidelines for Hazardous Locations

These products have been evaluated as Ex ec IIC T4 Gc equipment and are CCC certified. Each product is suitable for use within ambient temperatures of -40 °C ≤ Ta ≤ 70 °C in either nonhazardous locations or Zone 2 hazardous locations. If you are using the products in Gas Group IIC hazardous locations, you must use the device in an NI chassis that has been evaluated as Ex ec IIC T4 Gc equipment.

Follow these guidelines if you are installing the product in a potentially explosive environment. Not following these guidelines may result in serious injury or death.

Caution Do not disconnect I/O-side wires or connectors unless power has been switched off or the area is known to be nonhazardous.
Caution Do not remove modules unless power has been switched off or the area is known to be nonhazardous.
Caution Substitution of components may impair suitability for Zone 2.
Caution Transient protection shall be provided that is set at a level not exceeding 140% of the peak rated voltage value of 85 V at the supply terminals to the equipment.
Caution The system shall only be used in an area of not more than Pollution Degree 2, as defined in IEC/EN 60664-1.
Caution The system shall be mounted in a CCC-certified enclosure with a minimum ingress protection rating of at least IP54 as defined in GB/T3836.1.
Caution The enclosure must have a door or cover accessible only by the use of a tool.

Safety Voltages

NI-9375

Connect only voltages that are within the following limits:

Channel-to-COM

30 V DC maximum

External power supply (Vsup) voltage range

6 V DC to 30 V DC, 18 mA

Isolation

DI bank-to-DO bank

60 V DC maximum

Channel-to-Channel

No isolation between channels

Channel-to-earth ground

Continuous

60 V DC, Measurement Category I

Withstand up to 3,000 m

1,000 V RMS, verified by a 5 s dielectric withstand test

Withstand up to 5,000 m (DSUB and push-in spring terminal)

860 V RMS

Caution Do not connect the product to signals or use for measurements within Measurement Categories II, III, or IV.

NI-9401

Connect only voltages that are within the following limits:

Input range

0.8 V to 5.25 V

Output range

0.1 V to 4.7 V, 100 µA

Maximum voltage

Channel-to-COM

±30 V maximum on one channel at a time, Measurement Category I

Isolation voltages

Channel-to-channel

None

Channel-to-earth ground

Continuous

60 V DC, Measurement Category I

Withstand

1,000 V RMS, verified by a 5 s dielectric withstand test

Caution Do not connect the product to signals or use for measurements within Measurement Categories II, III, or IV.

NI-9402

Connect only voltages that are within the following limits:

Input range

0.8 V to 5.25 V

Output range

0.1 V to 3.0 V, 100 µA

Input overvoltage protection

±30 V maximum on one channel at a time

Channel-to-earth ground

±30 V maximum, Measurement Category I

Isolation

Channel-to-channel

None

Channel-to-earth ground

None

Caution Do not connect the product to signals or use for measurements within Measurement Categories II, III, or IV.

NI-9403

Connect only voltages that are within the following limits:

Input range

-0.25 V to 5.25 V

Output range

0.1 V to 5.2 V, 100 µA

Channel-to-COM

±30 V maximum on up to 8 channels at a time, Measurement Category I

Isolation

Channel-to-channel

None

Channel-to-earth ground

Continuous

60 V DC, Measurement Category I

Withstand

up to 3,000 m altitude

1,000 V RMS, verified by a 5 s dielectric withstand test

up to 5,000 m altitude

860 V RMS, verified by a 5 s dielectric withstand test

Caution Do not connect the product to signals or use for measurements within Measurement Categories II, III, or IV.

NI-9411

Connect only voltages that are within the following limits.

Input range

0 V to 24 V single-ended

-300 mV to 24 V differential

-7 V to 12 V common-mode

Overvoltage protection, channel-to-COM

30 V maximum, Measurement Category I

External power supply (Vsup)

5 V DC to 30 V DC

Isolation

Channel-to-channel

None

Channel-to-earth ground

Continuous

30 V RMS, 42.4 V peak, 60 V DC

Withstand

400 V RMS, verified by a 5 s dielectric withstand test

Caution Do not connect the product to signals or use for measurements within Measurement Categories II, III, or IV.

NI-9421 with Screw Terminal, NI-9421 with Spring Terminal

Connect only voltages that are within the following limits:

Channel-to-COM

30 V maximum

Overvoltage protection

40 V maximum

Reverse-biased voltage

-30 V maximum

Isolation

Channel-to-channel

None

Channel-to-earth ground

Continuous

250 V RMS, Measurement Category II

Withstand

2,300 V RMS, verified by a 5 s dielectric withstand test

Caution Do not connect the product to signals or use for measurements within Measurement Categories III or IV.

NI-9421 with DSUB

Connect only voltages that are within the following limits:

Channel-to-COM

30 V maximum

Overvoltage protection

40 V maximum

Reverse-biased voltage

-30 V maximum

Isolation

Channel-to-channel

None

Channel-to-earth ground

Continuous

60 V DC, Measurement Category I

Withstand

1,000 V RMS, verified by a 5 s dielectric withstand test

Caution Do not connect the product to signals or use for measurements within Measurement Categories II, III, or IV.

NI-9423 with Screw Terminal, NI-9423 with Spring Terminal

Connect only voltages that are within the following limits:

Channel-to-COM

30 V maximum

Overvoltage protection

35 V maximum

Reverse-biased voltage

-30 V maximum

Isolation

Channel-to-channel

None

Channel-to-earth ground

Continuous

250 V RMS, Measurement Category II

Withstand

2,300 V RMS, verified by a 5 s dielectric withstand test

Caution Do not connect the product to signals or use for measurements within Measurement Categories III or IV.

NI-9425 with Spring Terminal

Connect only voltages that are within the following limits.

Channel-to-COM

24 V

I/O protection

8 channels

60 V DC maximum

-60 V DC reverse-bias

32 channels

30 V DC maximum

-30 V DC reverse-bias

Channel-to-channel

Up to 8 channels simultaneously

±60 V maximum

All channels simultaneously

±30 V maximum

Isolation

Channel-to-channel

None

Channel-to-earth ground

Continuous

250 V RMS, Measurement Category II

Withstand up to 5,000 m

3,000 V RMS, verified by a 5 s dielectric withstand test

Caution Do not connect the product to signals or use for measurements within Measurement Categories III or IV.

NI-9425 with DSUB

Connect only voltages that are within the following limits.

Channel-to-COM

24 V

I/O protection

8 channels

60 V DC maximum

-60 V DC reverse-bias

32 channels

30 V DC maximum

-30 V DC reverse-bias

Channel-to-channel

Up to 8 channels simultaneously

±60 V maximum

All channels simultaneously

±30 V maximum

Isolation

Channel-to-channel

None

Channel-to-earth ground

Continuous

60 V DC, Measurement Category I

Withstand up to 2,000 m

1,000 V RMS, verified by a 5 s dielectric withstand test

Withstand up to 5,000 m

500 V RMS, verified by a 5 s dielectric withstand test

Caution Do not connect the product to signals or use for measurements within Measurement Categories II, III, or IV.

NI-9426

Connect only voltages that are within the following limits:

Vsup-to-channel

30 V DC maximum

Isolation

Channel-to-channel

None

Channel-to-earth ground

Continuous

60 V DC, Measurement Category I

Withstand

1,000 V RMS, verified by a 5 s dielectric withstand test

Caution Do not connect the product to signals or use for measurements within Measurement Categories II, III, or IV.

NI-9470

Connect only voltages that are below these limits.

Vsup-to-COM

0 V DC to 30 V DC maximum, Measurement Category I

Isolation

Channel-to-channel

None

Channel-to-earth ground

Continuous

60 V DC, Measurement Category I

Withstand

1,000 V RMS, verified by a 5 s dielectric withstand test

Caution Do not connect the product to signals or use for measurements within Measurement Categories II, III, or IV.

NI-9472 with Screw Terminal, NI-9472 with Spring Terminal

Connect only voltages that are within the following limits.

Channel-to-COM

30 V DC maximum

External power supply (Vsup) voltage range

6 V DC to 30 V DC

Isolation

Channel-to-channel

None

Channel-to-earth ground

Continuous

250 V RMS, Measurement Category II

Withstand

2,300 V RMS, verified by a 5 s dielectric withstand test

Caution Do not connect the product to signals or use for measurements within Measurement Categories III or IV.

NI-9472 with DSUB

Connect only voltages that are within the following limits.

Channel-to-COM

30 V DC maximum

External power supply (Vsup) voltage range

6 V DC to 30 V DC

Isolation

Channel-to-channel

None

Channel-to-earth ground

Continuous

60 V DC, Measurement Category I

Withstand

1,000 V RMS, verified by a 5 s dielectric withstand test

Caution Do not connect the product to signals or use for measurements within Measurement Categories II, III, or IV.

NI-9474 with Screw Terminal, NI-9474 with Spring Terminal

Connect only voltages that are within the following limits.

Channel-to-COM

30 V DC maximum

External power supply (Vsup) voltage range

5 V DC to 30 V DC

Isolation

Channel-to-channel

None

Channel-to-earth ground

Continuous

250 V RMS, Measurement Category II

Withstand

2,300 V RMS, verified by a 5 s dielectric withstand test

Caution Do not connect the product to signals or use for measurements within Measurement Categories III or IV.

NI-9475

Connect only voltages that are within the following limits:

Vsup-to-COM

60 V DC maximum, Measurement Category I

Isolation

Channel-to-channel

None

Channel-to-earth ground

Continuous

60 V DC, Measurement Category I

Withstand

1,000 V RMS, verified by a 5 s dielectric withstand test

Caution Do not connect the product to signals or use for measurements within Measurement Categories II, III, or IV.

NI-9476 with Spring Terminal

Connect only voltages that are within the following limits.

External power supply (Vsup) voltage range

6 V DC to 36 V DC

Vsup-to-COM

40 V DC maximum

DO

VCOMVDOVsup

Isolation

Channel-to-channel

None

Channel-to-earth ground

Continuous

250 V RMS, Measurement Category II

Withstand up to 5,000 m

3,000 V RMS, verified by a 5 s dielectric withstand test

Caution Do not connect the product to signals or use for measurements within Measurement Categories III or IV.

NI-9476 with DSUB

Connect only voltages that are within the following limits.

External power supply (Vsup) voltage range

6 V DC to 36 V DC

Vsup-to-COM

40 V DC maximum

DO

VCOMVDOVsup

Isolation

Channel-to-channel

None

Channel-to-earth ground

Continuous

60 V DC, Measurement Category I

Withstand up to 2,000 m

1,000 V RMS, verified by a 5 s dielectric withstand test

Caution Do not connect the product to signals or use for measurements within Measurement Categories II, III, or IV.

NI-9477

Connect only voltages that are within the following limits:

External power supply (Vsup) voltage range

0 V DC to 60 V DC

Channel-to-COM

60 V DC maximum, Measurement Category I

Isolation

Channel-to-channel

None

Channel-to-earth ground

Continuous

60 V DC, Measurement Category I

Withstand

1,000 V RMS, verified by a 5 s dielectric withstand test

Caution Do not connect the product to signals or use for measurements within Measurement Categories II, III, or IV.

NI-9478

Connect only voltages that are within the following limits:

External power supply (Vsup) voltage range

0 V DC to 50 V DC

Vsup-to-COM

50 V DC maximum, Measurement Category I

Isolation

Channel-to-channel

None

Channel-to-earth ground

Continuous

60 V DC, Measurement Category I

Withstand

1,000 V RMS, verified by a 5 s dielectric withstand test

Caution Do not connect the product to signals or use for measurements within Measurement Categories II, III, or IV.

Installing C Series Modules

Verify that power is not connected to the I/O connector(s) on the C Series module.

Removing C Series Modules

Verify that power is not connected to the I/O connector(s) on the C Series module before you remove a module from the chassis.

Safety Compliance and Hazardous Locations Standards

This product is designed to meet the requirements of the following electrical equipment safety standards for measurement, control, and laboratory use:

  • IEC 61010-1
  • IEC 60079-0, IEC 60079-7
  • GB/T3836.1, GB/T3836.3
Note For safety certifications, refer to the product label or the Product Certifications and Declarations section.

Product Certifications and Declarations

To obtain product certifications and the DoC for NI products, visit ni.com/product-certifications, search by model number, and click the appropriate link.

Worldwide Support and Services

NI corporate headquarters is located at 11500 North Mopac Expressway, Austin, Texas, 78759-3504, USA.