NI-9351 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.

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

5,000 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.

Functional Safety Standards

This product is designed for Functional Safety applications and meets the following standards:

  • IEC/EN 61508:2010; Functional Safety of Electrical Systems, Second Edition
  • IEC/EN 62061; Safety of Machinery
  • IEC/EN 61511; Safety Instrumented Systems for the Process Industry Sector

Functional Safety Certification

Safety Integrity Level

SIL3 (IEC 61508)

Hardware fault tolerance

0

Useful lifetime

At 55 °C

20 years

At 70 °C

10 years

Note Useful lifetime specifications assume constant operation at the given temperature. If temperatures periodically drop below the given temperature, the useful lifetime will be longer than specified.
Table 1. IEC 61508 Failure Rates in FIT[1]1 1 FIT = 1 failure/109 hours
Failure Categories λSD λSU λDD λDU
Common, sea level 419 10 282 10
Common, 2,000 m 858 11 720 10
Common, 5,000 m 4,100 14 3,970 13
AI common 70.1 0.9 110 1.4
AI per channel 0.8 0.01 1.4 0.3
DI common 7.0 0.1 19 0.2
DI per channel 14 2.2 15 0.5
DO per channel 39 0.7 0.2 0.2

Input/Output Characteristics

Number of channels

4 analog input

4 digital input

4 digital output

Analog Input

Analog input range

Minimum

0 mA to 24 mA

Typical

0 mA to 25.5 mA

ADC resolution

16 bit

Type of ADC

Successive approximation register (SAR)

Sampling mode

Scanned

AI Vsup

Current

2 A, maximum

Voltage

30 V, maximum

Table 2. Accuracy
Calibrated Measurement Conditions Percent of Reading (Gain Error) Percent of Range[2]2 Range equals 24 mA(Offset Error)
Typical (25 °C ± 5 °C) ±0.12% ±0.03%
Maximum (-40 °C to 70 °C, 2 years) ±0.47% ±0.13%
Typical (-40 °C to 70 °C, 20 years) ±0.90% ±0.20%

Sample rate

1 kS/s

Input noise

400 nA RMS

Overvoltage protection, channel-to-COM

20 V, single-channel, up to 55 °C

Fault voltage derating

Refer to the following figure.

Figure 1. Fault Voltage Derating Across Operating Temperature Range

1378

Stability

Gain drift

22 ppm/°C

Offset drift

174 nA/°C

Input bandwidth (-3 dB)

12.4 kHz

Input impedance

82 Ω, typical

200 Ω, maximum

Digital Input

Input type

Sinking

Input voltage range

0 V to 30 V

Digital logic levels
OFF

Input voltage

≤6.0 V

ON

Input voltage

≥11.0 V

Input current at 24 V

1.1 mA

Hysteresis

3.0 V

Digital input sinking current

Refer to the following figure.

Figure 2. Digital Input Sinking Current vs Digital Input Voltage

1378

Input voltage protection

±30 V DC

Digital Output

Output type

Sourcing

Minimum ON time

190 μs

Caution You must enforce minimum ON time or the channel may fail to de-energize in an overcurrent or short-circuit condition. Failure to de-energize in an overcurrent or short-circuit condition may damage the module.
Caution Vous devez respecter une durée d'activation minimale, sinon la voie risque de ne pas passer hors tension en cas de surintensité ou de court-circuit. L'absence de mise hors tension en cas de surintensité ou de court-circuit peut endommager le module.

Minimum OFF time

170 μs

Caution You must enforce minimum OFF time except when the channel is configured with test pulses. Test pulse width may be smaller than the minimum OFF time.
Caution Vous devez respecter un temps d'arrêt minimum, sauf lorsque la voie est configurée avec des impulsions de test. La largeur de l'impulsion de test peut être inférieure au temps d'arrêt minimum.

Continuous output current (per channel)

250 mA, maximum

ON state voltage drop (Vsup pin to DO pin)

45 mV + (channel output current) × 0.3 Ω, maximum

OFF state leakage current

0.2 mA, maximum

Required external load

50 kΩ, maximum

Note The required external load must be present on DO configurations with internal readback or internal test pulse. A readback fault or test pulse fault may occur if the required external load is not present.

Load capacitance

0.5 μF, maximum

Cable length

200 m, maximum

Open circuit detection

11 mA

2 mA, minimum

20 mA, maximum

Protection

Voltage

0 V to Vsup, maximum

Reverse Voltage

None

Overcurrent channel disable

>250 mA, minimum

340 mA, maximum

Note Transient loads exceeding overcurrent protection will trigger an overcurrent fault. This does not apply to inrush currents required to drive the specified load capacitance and cable length.

Power Requirements

Power consumption from chassis

Active mode

60 mW, maximum

Sleep mode

200 μW, maximum

Thermal dissipation (at 70 °C)

Active mode

1.5 W, maximum

Sleep mode

1.5 W, maximum

External Power Supply Requirements

Caution You must use an appropriate power source to limit output power in case of a fault. For a list of required power supply categories, refer to the C Series Functional Safety Manual on ni.com/manuals.

Voltage input range

19 V DC to 30 V DC

Note The NI-9351 includes input power protection circuitry. If the voltage at Vsup falls outside the voltage input range, the module will power down and all channels will de-energize. You must cycle external power to the module to resume operation.
Power consumption, active or sleep mode

No DO load

1.05 W, maximum

Full DO load, 30 V input

31.3 W, maximum

Physical Characteristics

If you need to clean the module, wipe it with a dry towel.

Tip For two-dimensional drawings and three-dimensional models of the C Series module and connectors, visit ni.com/dimensions and search by module number.
Spring terminal wiring

Wire length

30 cm (12 in.), minimum

COM jumper length

30 cm (12 in.), minimum

Gauge

0.50 mm2 to 1.5 mm2 (20 AWG to 16 AWG) copper conductor wire, if using single wire per spring terminal; 0.34 mm2 (22 AWG) copper conductor wire, if using two wires per spring terminal

Wire strip length

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

Insulation temperature rating

90 °C, minimum

Wires per spring terminal

One solid or stranded wire per spring terminal; two stranded wires per spring terminal using a two-wire ferrule

Ferrules

Single ferrule, uninsulated

0.50 mm2 to 1.5 mm2 (20 AWG to 16 AWG), 10 mm barrel length

Single ferrule, insulated

0.50 mm2 to 1.0 mm2 (20 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

0.25 N · m (2.2 lb · in.)

Weight[3]3 Includes 26-pin spring terminal and connector backshell.

210 g (7.4 oz)

Safety Response Times

Note These specifications list minimum guaranteed times unless otherwise noted.
Note For more information on how to calculate response times, refer to the C Series Functional Safety Manual on ni.com/manuals.

Total C Series Functional Safety Module Response Time

Digital Configurations

Single input and dual input

122 µs

Single input with test pulse and dual input with test pulse

230 µs

Analog Configurations

Single input (1oo1)

2.065 ms

Dual input (1oo2)

2.065 ms

Triple input (2oo3)

2.065 ms

Application processing time

60 µs

Output signal response time[4]4 Includes delay time from a change in safety processing logic output to the digital output turning off. This does not include the discharge time for the output load.

5 μs, maximum

Digital Input Signal Response Time

Input signal response time (1 to 0)

Single or dual input

57 µs

Single or dual input with test pulses

165 µs

Note Input signal response time (1 to 0) assumes a 3 kΩ external pull-down, 50 m cable length with capacitance <180 pF/m, and the debounce filter and test pulse width set to the minimum values for the given configuration.
Input signal response time (0 to 1)

Single input

20 µs

Dual input

122 µs

Single input with test pulses

346 µs

Dual input with test pulses

649 µs

Note Input signal response time (0 to 1) assumes the debounce filter, test pulse width, and discrepancy time are set to minimum values for the given configuration.

Input discharge time (1 to 0)

40 µs

Note Input discharge time represents a 30 V to low state voltage threshold crossing. The maximum input discharge time assumes a 3 kΩ external pull-down, 50 m cable length with a capacitance <180 pF/m.

Analog Input Signal Response Time

Single input

2 ms

Dual input (1oo2)

2 ms

Triple input (2oo3)

2 ms

Automatic Self-Diagnostics Test Interval

Temperature fault

1.01 s

Analog input self-diagnostic faults

2 ms

Other automatic self-diagnostic faults

160 µs

Power down response time[5]5 Includes delay time from a change in safety processing logic output until power down activates. This does not include the discharge time for the internal 40 µF bulk capacitance or the output load.

435 µs

User-Configurable Diagnostic Response Time

Digital Configurations

Overcurrent

145 µs

Open circuit

145 µs

Test pulse

340 µs with output line load configured to very light

Internal readback

150 µs with output line load configured to very light

External readback

149 µs

Dual input discrepancy

159 µs

Note Test pulse and internal readback diagnostic response times depend on the output line load. Output line load is a configurable parameter for digital outputs in the Functional Safety Editor. For more information on configuring output line loads, refer to the C Series Functional Safety Manual on ni.com/manuals.
Analog Configurations

Overcurrent fault

2 ms

Discrepancy fault

3.002 ms

Discrepancy warning

3.002 ms

Note User-configurable diagnostics assume the minimum values for test pulse width, test pulse period, discrepancy time, read back delay, and output line load.

Safety Voltages

Connect only voltages that are within the following limits:

Caution Do not connect hazardous voltages to the NI-9351. A hazardous voltage is a voltage greater than 42.4 V peak voltage or 60 V DC to earth ground.
Caution Ne pas connecter de tensions dangereuses au NI-9351. Une tension dangereuse est une tension supérieure à une tension de crête de 42,4 V ou à une tension par rapport à la terre de 60 V CC.
Maximum voltages

Vsup-to-COM

30 V DC

DI-to-COM

30 V DC

DO-to-COM

0 V DC to Vsup

AI-to-COM

20 V DC

AI Vsup-to-COM

30 V DC

Caution DO channels are not protected for negative voltages or voltages greater than Vsup.
Caution Les voies DO ne sont pas protégées des tensions négatives ou des tensions supérieures à Vsup.
Isolation voltages
Channel-to-earth[6]6 Channels include Vsup, AI Vsup, and COM. (up to 5,000 m)

Continuous

60 V DC, Measurement Category I

Withstand

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

Measurement Category

Measurement Category I

Caution Do not connect the product to signals or use for measurements within Measurement Categories II, III, or IV.
Attention Ne pas connecter le produit à des signaux dans les catégories de mesure II, III ou IV et ne pas l'utiliser pour effectuer des mesures dans ces catégories.
Warning Do not connect the product to signals or use for measurements within Measurement Categories II, III, or IV, or for measurements on MAINs circuits or on circuits derived from Overvoltage Category II, III, or IV which may have transient overvoltages above what the product can withstand. The product must not be connected to circuits that have a maximum voltage above the continuous working voltage, relative to earth or to other channels, or this could damage and defeat the insulation. The product can only withstand transients up to the transient overvoltage rating without breakdown or damage to the insulation. An analysis of the working voltages, loop impedances, temporary overvoltages, and transient overvoltages in the system must be conducted prior to making measurements.
Mise en garde Ne pas connecter le produit à des signaux dans les catégories de mesure II, III ou IV et ne pas l'utiliser pour des mesures dans ces catégories, ou des mesures sur secteur ou sur des circuits dérivés de surtensions de catégorie II, III ou IV pouvant présenter des surtensions transitoires supérieures à ce que le produit peut supporter. Le produit ne doit pas être raccordé à des circuits ayant une tension maximale supérieure à la tension de fonctionnement continu, par rapport à la terre ou à d'autres voies, sous peine d'endommager et de compromettre l'isolation. Le produit peut tomber en panne et son isolation risque d'être endommagée si les tensions transitoires dépassent la surtension transitoire nominale. Une analyse des tensions de fonctionnement, des impédances de boucle, des surtensions temporaires et des surtensions transitoires dans le système doit être effectuée avant de procéder à des mesures.

Measurement Category I is for measurements performed on circuits not directly connected to the electrical distribution system referred to as MAINS voltage. MAINS is a hazardous live electrical supply system that powers equipment. This category is for measurements of voltages from specially protected secondary circuits. Such voltage measurements include signal levels, special equipment, limited-energy parts of equipment, circuits powered by regulated low-voltage sources, and electronics.

Note Measurement Categories CAT I and CAT O are equivalent. These test and measurement circuits are for other circuits not intended for direct connection to the MAINS building installations of Measurement Categories CAT II, CAT III, or CAT IV.

Calibration

You can obtain the calibration certificate and information about calibration services for the NI-9351 at ni.com/calibration.

Calibration interval

1 year

1 1 FIT = 1 failure/109 hours

2 Range equals 24 mA

3 Includes 26-pin spring terminal and connector backshell.

4 Includes delay time from a change in safety processing logic output to the digital output turning off. This does not include the discharge time for the output load.

5 Includes delay time from a change in safety processing logic output until power down activates. This does not include the discharge time for the internal 40 µF bulk capacitance or the output load.

6 Channels include Vsup, AI Vsup, and COM.