NI-9474 Specifications

NI-9474 Nomenclature

In this article, the NI-9474 with screw terminal and NI-9474 with spring terminal are referred to inclusively as the NI-9474. The information in this document applies to all versions of the NI-9474 unless otherwise specified.

Definitions

Warranted specifications describe the performance of a model under stated operating conditions and are covered by the model warranty.

Characteristics describe values that are relevant to the use of the model under stated operating conditions but are not covered by the model warranty.

  • Typical specifications describe the performance met by a majority of models.
  • Nominal specifications describe an attribute that is based on design, conformance testing, or supplemental testing.

Specifications are Typical unless otherwise noted.

Conditions

Specifications are valid for the range -40 °C to 70 °C unless otherwise noted. All voltages are relative to COM unless otherwise noted.

NI-9474 Pinout



Note You must use 2-wire ferrules to create a secure connection when connecting more than one wire to a single terminal on the NI-9474 with screw terminal or NI-9474 with spring terminal.
Table 1. NI-9474 Signal Descriptions
Signal Description
COM Common reference connection to isolated ground
DO Digital output signal connection
Vsup Voltage supply connection
Table 3. LED Indicators
LED Pattern Indication
Solid The channel has been programmed to be in the ON state.
Off The channel has been programmed to be in the OFF state.

Output Characteristics

Number of channels

8 digital output channels

Output type

Sourcing

Power-on output state

Channels off

External power supply voltage range (Vsup)

5 V DC to 30 V DC

Output impedance (R0)

Typical

0.07 Ω

Maximum

0.13 Ω

Continuous output current (I0), per channel

1.0 A maximum

Output voltage (V0)

Vsup - (I0 · R0)

I/O protection

Voltage

30 V DC maximum

Reversed voltage

None

Short circuit trip time

10 µs at 14 A

Table 3. Short-circuit Behavior
Current Channel Behavior Module Protection
Less than 1 A Channel does not trip Module is not damaged
1 A to 2 A for 100 ms maximum, repeatable after 1 s[1]1 One channel at a time. Channel does not trip Module is not damaged
2 A to 4.4 A Channel does not trip Module may be damaged
4.4 A to 14 A Channel may trip Module may be damaged
Greater than 14 A Channel trips Module is not damaged
Figure 1. Short-circuit Behavior


Output delay time (full load)

1 µs maximum

MTBF

479,889 hours at 25 °C; Bellcore Issue 2, Method 1, Case 3, Limited Part Stress Method

Safety Voltages

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.
Attention Ne pas connecter le produit à des signaux dans les catégories de mesure III ou IV et ne pas l'utiliser pour effectuer des mesures dans ces catégories.

Measurement Category II is for measurements performed on circuits directly connected to the electrical distribution system. This category refers to local-level electrical distribution, such as that provided by a standard wall outlet, for example, 115 V for U.S. or 230 V for Europe.

Environmental Characteristics

Temperature

Operating

-40 °C to 70 °C

Storage

-40 °C to 85 °C

Humidity

Operating

10% RH to 90% RH, noncondensing

Storage

5% RH to 95% RH, noncondensing

Ingress protection

IP40

Pollution Degree

2

Maximum altitude

2,000 m

Shock and Vibration
Operating vibration

Random

5 g RMS, 10 Hz to 500 Hz

Sinusoidal

5 g, 10 Hz to 500 Hz

Operating shock

30 g, 11 ms half sine; 50 g, 3 ms half sine; 18 shocks at 6 orientations

To meet these shock and vibration specifications, you must panel mount the system.

Power Requirements

Power consumption from chassis

Active mode

660 mW maximum

Sleep mode

0.6 mW maximum

Thermal dissipation (at 70 °C)

Active mode

1.5 W maximum

Sleep mode

0.6 mW maximum

Physical Characteristics

Dimensions and Weight

Dimensions

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

Weight

NI-9474 with screw terminal

150 g (5.3 oz)

NI-9474 with spring terminal

139 g (4.9 oz)

NI-9474 with 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 terminal

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

Ferrules

0.25 mm2 to 2.5 mm2

NI-9474 with spring terminal with 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 terminal

One wire per spring terminal; two wires per spring 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.)

1 One channel at a time.