NI-9425 Specifications

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.

NI-9425 Pinout



Table 1. Signal Descriptions
Signal Description
COM Common reference connection to isolated ground
DI Digital input signal connection
NC No connection

Input Characteristics

Number of channels

32 digital input channels

Input type

Sinking

Digital logic levels
OFF state

Input voltage

≤5 V

Input current

≤150 μA

ON state

Input voltage

≥10 V

Input current

≥330 μA

Hysteresis

Input voltage

2 V minimum

Input current

60 μA minimum

Input impedance

30 kΩ ± 5%

I/O protection
Input voltage

8 channels

60 V DC maximum

32 channels

30 V DC maximum

Reverse-biased voltage

8 channels

-60 V DC maximum

32 channels

-30 V DC maximum

Hold time[1]1 Hold time is the amount of time input signals must be stable after initiating a read from the module.

0 μs minimum

Setup time[2]2 Setup time is the amount of time input signals must be stable before reading from the module.

1 μs minimum

Update/transfer time[3]3 The update/transfer time is valid when the module is used in a CompactRIO system. When used in other systems, driver software and system latencies impact this time.

cRIO-9151 R Series Expansion chassis

8 μs maximum

All other chassis

7 μs maximum

MTBF

1,256,699 hours at 25 °C; Bellcore Issue 2, Method 1, Case 3, Limited Part Stress Method

Power Requirements

Power consumption from chassis

Active mode

410 mW maximum

Sleep mode

0.5 mW maximum

Thermal dissipation (at 70 °C)

Active mode

1.45 W maximum

Sleep mode

1 W maximum

Physical Characteristics

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.)

Weight

NI-9425 with spring terminal

163 g (5.7 oz)

NI-9425 with DSUB

147 g (5.2 oz)

NI-9425 with Spring Terminal Safety Voltages

Connect only voltages that are within the following limits:

Channel-to-COM

60 V DC

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

NI-9425 with DSUB Safety Voltages

Connect only voltages that are within the following limits:

Channel-to-COM

60 V DC

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

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.

Calibration

You can obtain the calibration certificate and information about calibration services for the NI-9425 at ni.com/calibration.

Calibration interval

1 year

1 Hold time is the amount of time input signals must be stable after initiating a read from the module.

2 Setup time is the amount of time input signals must be stable before reading from the module.

3 The update/transfer time is valid when the module is used in a CompactRIO system. When used in other systems, driver software and system latencies impact this time.