NI-9326 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 9326 Pinout



There are 6 PFI lines, from CH0 to CH5. Each counter can use any of the input PFI lines to perform measurements. Two counters can use the same PFI line as inputs for their measurements, as long as the input configurations are the same for both counters.

Input Characteristics

Number of inputs

6

Input type

Differential or single-ended

Input range

150 V RMS maximum; ±50 mV minimum

I/O protection

Input voltage (CH+-to-CH-)

150 V RMS

Input bandwidth (-3 dB)

241 kHz

Input frequency range

0.025 Hz — 128 kHz

Input pulse width detection1 Threshold setting between 10% to 90% of signal amplitude and for unsaturated square wave (<25 Vpp) only.[1]

2.0 µs minimum

Configurable input active edge per channel

Rising/Falling edge detection

Configurable input threshold range per channel

-9.5 V to 9.5 V

Configurable input hysteresis range per channel

0 V to 5 V

Input threshold error

0.6% maximum

Input threshold resolution

7.8 mV

Digital Glitch Filter line filtering settings, programmable per line

0 ns (disabled) to 5.24 ms in 80 ns steps

Input propagation delay[1]

1.67 μs maximum

Input channel-to-channel skew[1]

85 ns maximum

Input pulse width distortion[1]

1.53 μs maximum

Butterworth filter

Filter order

2nd order

Table 1. Butterworth Filter Cut-off Frequencies and Filter Delays
Filter Frequency Cut-off Frequency Filter Delay Filter Settling[2]2 Settled to 99% of final value.
Filter Frequency - 1 6167 Hz 0.037 ms 0.120 ms
Filter Frequency - 2 2941 Hz 0.070 ms 0.250 ms
Filter Frequency - 3 1439 Hz 0.137 ms 0.513 ms
Filter Frequency - 4 712 Hz 0.270 ms 1.032 ms
Filter Frequency - 5 354 Hz 0.537 ms 2.075 ms
Filter Frequency - 6 177 Hz 1.069 ms 4.163 ms
Filter Frequency - 7 88 Hz 2.135 ms 8.332 ms
Filter Frequency - 8 44 Hz 4.266 ms 16.673 ms
Filter Frequency - 9 22 Hz 8.529 ms 33.360 ms
Filter Frequency - 10 11 Hz 17.054 ms 66.727 ms
Filter Frequency - 11 6 Hz 34.103 ms 133.463 ms
Filter Frequency - 12 3 Hz 68.202 ms 266.940 ms
Filter Frequency - 13 1 Hz 136.401 ms 533.886 ms

Counter Features

Number of counters

6 counters

Resolution

32 bits

Sample rate

102.4 kHz maximum

Counter measurements

Frequency, Period, Edge counting

Internal timebase

100 MHz

Timebase accuracy

±64 ppm maximum

Input routing

Any channel can drive any counter input

Power Up Default Input and Counter Configuration

Threshold level

0 V

Hysteresis level

31.25 mV

Input Active Edge Detection

Rising

Digital Glitch Filter pulse width

0.48 μs

Butterworth Filter

Enabled

Butterworth Low Pass Filter cut-off

Filter Frequency-1

Frequency Measurement Accuracy

Table 2. Frequency Accuracy (for 128 kHz input)
Filter Mode Maximum Accuracy (%) Typical Noise (Hz Peak)
Filter Disabled (Divisor =1) 0.2568 1660
Filter Frequency — 1 0.0424 825
Filter Frequency — 2 0.0245 410
Filter Frequency — 3 0.0174 164
Filter Frequency — 4 0.0124 66
Filter Frequency — 5 0.0111 25
Filter Frequency — 6 0.0088 12
Filter Frequency — 7 0.0084 6
Filter Frequency — 8 0.0084 6
Filter Frequency — 9 0.0084 6
Filter Frequency — 10 0.0084 6
Filter Frequency — 11 0.0084 6
Filter Frequency — 12 0.0084 6
Filter Frequency — 13 0.0084 6
Figure 1. Maximum Frequency Accuracy across Frequencies


Figure 2. Frequency Noise


Crosstalk

Note Crosstalk is improved by >13 dB if measurement channel skips one channel from aggressor channel.
  1. Sine wave (VR sensor crosstalk with source impedance at victim channels)
    Figure 1. VR Sensor Crosstalk


  2. Square wave (Hall-effect sensor and encoder crosstalk with source impedance at victim channels)
    [6.22⁢×LN(Sensor⁢ Impedance)−94.7]dB

Power Requirements

Power consumption from chassis

Active mode

0.89 W maximum

Sleep mode

53 μW maximum

Thermal dissipation (at 70 °C)

Active mode

1.44 W maximum

Sleep mode

0.66 W maximum

Physical Characteristics

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.)

Weight

170 g (6.0 oz)

Dimensions

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

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

NI-9326 Safety Voltages

Connect only voltages that are within the following limits:

Channel-to-channel isolation

Continuous

150 V RMS, Measurement Category I

Withstand

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

Channel-to-earth ground isolation

Continuous

150 V RMS, Measurement Category I

Withstand

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

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.

1 Threshold setting between 10% to 90% of signal amplitude and for unsaturated square wave (<25 Vpp) only.

2 Settled to 99% of final value.